NAT NAT_T & identity

Hello

I just want to know when implements VPN site to site IPsec between two ASA

When I use NAT_T and when to use identity NAT

my information

says that when there is a nat between them device using NAT_T

and if we do not use a nat device (I still don't know how if there is a nat device or not since the vpn pass through the public internet.)
We use identity nat

I just want to hear a simple explanation

waiting for your answers

Hi Marc,

Please take a look at the section 3.2 or RFC 3947:

http://www.FAQs.org/RFCs/RFC3947.html

Detection of NAT is described here.

HTH,

Marcin

Tags: Cisco Security

Similar Questions

Validation of the IOS VPN peer identity IP with NAT - T

I just lost a lot of time to understand this behavior of the IOS. My conclusion reached: If you work with the good old peer identity address validation in profiles ISAKMP and the peer you are talking about is located behind a NAT, you must use the private IP address of the peer in the command "adapter address of the identity". I thought that NAT - T takes care of the translation in all sections of required configuration, but here especially, seems not so much. The interesting thing is that for all other orders, you must use the public IP address.

See the following example (showing only the relevant articles with statements by peer inside):

door-key crypto OUR_KEYRING

key pre-shared key address 1.2.3.4

Crypto isakmp PROFILE_NAME profile

VRF TEST

key ring OUR_KEYRING

function identity address 192.168.99.5 255.255.255.255

OUR_MAP 6 ipsec-isakmp crypto map

defined peer 1.2.3.4

the value of PROFILE_NAME isakmp-profile

Does anyone know if this is normal or if it is a bug? It would be useful and consistent if NAT - T changed the identity of the peer address during the phase 1 negotiation, then we would not deal with peer private addressing within site to site VPN configs. I also think of IP scenarios that overlap that may occur when you work with dealing with private peer.

See the release of relevant debugging in the attachment, after documenting a failed connection attempt (using the public, NATted IP of the peer in the command 'fit the address of identity') and once a following connection attempt (using the IP private, internal counterpart).

My router is a C2951 with IOS 15.3 (2) T2. The counterpart is an ASA (version & unknown config so far, but I'm sure that the other engineer did not indicate what it is using a private address in its config, despite my session from behind a NAT router, too).

Thank you & best regards

Toni

Toni,

Problem with identity is that it is an encrypted package (in Exchange MM) so cannot be changed in transit, so that a host may not know reliably it is the external IP address (it can make assumptions, but he doesn't know how long it is valid for).

Also if you "NAT 'd" identity you can't the difference between two devices behind same NAT/PAT on end of answering machine.

There are some implmentations IKE allowing IKE to identity type and value to specify manually. IOS not among them.

Yes decouple us identity and peer of the intellectual property, it adds flexability with a few corner cases which may arrise.

Yet another reason why NAT is evil?

M.

ASA NAT to 8.4

I'm doing the VPN tunnel between router IOS and ASA 5505. The ASA has a dynamic IP address

Everything would be ok, but I don't understand NAT in ASA's new orders. Can you tell me how to convert it to version 8.3 - 4?

access-list no. - NAT allowed extended ip 10.1.1.0 255.255.255.0 10.2.1.0 255.255.255.0

Global 1 interface (outside)

NAT (inside) - No. - NAT 0 access list

NAT (inside) 1 0.0.0.0 0.0.0.0

I use this link

http://www.Cisco.com/c/en/us/support/docs/security/PIX-500-series-Securi...

Thanks for any help.

Take a look at the document, depending on where you can find almost everything on the new model of NAT:

https://supportforums.Cisco.com/document/132066/ASA-NAT-83-NAT-operation-and-configuration-format-CLI

Especially "NAT0 / NAT Exemption / identity NAT ' in part"TWICE-NAT-MANUAL-NAT"is relevant for this task.

Security level limited access to high security

Dear all,

I have something that I need your help it clarify for me; for reasons of tests outside NAT in PIX, I placed a host on the external interface of my FW PIX and another on the inside interface. We'll call inside host (Host: 172.16.1.178) and outside (Host B: 192.168.1.96).

I then applied:

NAT (inside) 0 0 0 and

NAT (outside) 0 0 0 outside

orders to have two subnets appear to others with their original IP addresses. When ping from host B to host, no response is received and a 305005 syslog message (no translation group not found for ICMP src outdoors: 192.168.1.96 dst inside: 172.16.1.178)... However, when ping from host A to host B with the original B IP host, a response is received successfully. After this, lead to confusion if I try again to ping from host B to host, things work this time without errors. (Note: ICMP is applied both way).

Applying clear XLATE, again! Looks like the PIX doesn't sends the request of host B to host A unless there is a previous, established session from the host through the PIX.

Does anyone have an explanation for what's going on? Is their someone who have experienced something like this before?

Know your opinion.

Thank you

Haitham

You are using nat 0 (identity nat) that does not allow two-way communication, UNLESS the host location to the interface high security initiates the connection.

You can try the following:

public static 172.16.1.178 (Interior, exterior) 172.16.1.178 netmask 255.255.255.255

Which allows inside the host to be 'translated' to the outside and allow the host located on the untrsuted start the communication itself (will be seen with the same IP address)

more information:

http://www.Cisco.com/univercd/CC/TD/doc/product/iaabu/PIX/pix_sw/v_63/cmdref/s.htm#wp1026694

Franco Zamora

Identity NAT - lower growth

Having looked through the forums, it seems that identity NAT, it is what I'm looking for, but could someone confirm?

I have a server accessible via a wan connection on a demilitarized zone. I want internal users to access this server via an INTERNAL network address.

for example static (dmz, upside down) 10.1.1.100 200.1.1.100 netmask 255.255.255.255 0 0 - (assuming 10.1.1.0 is lan and 200.1.1.0 network via wan)

This will work, and is it all etc. of nat/sheep conditions?

Thank you

Hello

Your original post was on the right track. You need to configure is the d - nat inside so that it translate destination address of the safety interface higher at the bottom of the interface. If your ip address is 20.1.1.1 and you want to reach to the server using 10.1.1.100 which is your internal ip address, then your static should look like this.

static (dmz, upside down) 10.1.1.100 20.1.1.1 netmask 255.255.255.255

Thank you

Renault

Identity firewall does not work with NAT

We implement an environment that restrict access to Internet with rules based on users and groups to Active Directory.

There were many difficulties, but the current state is:

-The 'Test' of the firewall server-> identity Options results GOOD group

-The 'Test' of Agent of Active Directory on Windows-> identity Options GOOD results

-The rules we applied on the inside Firewall identity-based Interface are no "respected".

The environment:

-We have two ASA 5520 to failover.

-There are four contexts in this pair of ASA.

-Now we are activating the firewall of identity in a context.

-Of course, the AD are in one of the inside of this context, networks.

On the Configuration Guide of the identity of Firewall, to

http://www.Cisco.com/en/us/docs/security/ASA/asa84/asdm64/configuration_guide/access_idfw.html#wp1349541

We have seen that there are a lot of features that are not supported:

...

The following features of ASA do not support the use of the object based on the identity and the FULL domain name:

Route-map

-Crypto card

-WCCP

-NAT

-Group (except filter VPN) policy

-DAP

...

When using NAT does not, just remove NAT.

How to configure this feature? Identity with NAT work?

This is the reason why you have not any user ip in ASA mappings.

Domain configured in ASA name must be the netbios domain name and it must be matched with one that you see 'adacfg dc list' output, otherwise ASA will drop all user agent AD ip report.

You can have a try with the following new configs.

field of the identity of the user TEST4 aaa-Server AD-TEST4

identity of the user by default-field TEST4

inside_access_in list extended access deny the user ip TEST4\rodrigo a whole

identity NAT

Hello

I have a question,

If I want to assign a public ip address @, and do a nat 0,.

but my question is because the inisde ip address is private and pourles differnet from the public, how can they communicate?

is this possible?

thaks a lot.

Thanks for the clarification, now I think I know what you're trying to ask. NAT 0 is normally used when you do not want the PIX to run NATTING to some or all of the hosts, however, you cannot have two ip subnets that are directly connected to an interface of the PIX. You may be able to have a public address somewhere inside the PIX, condition that there is a way to reach this address through a device of next hop (some gateway) on the same subnet as the PIX inside interface. The host in question will require a gateway to be on the same subnet as the host to be able to communicate to the outside world. Appropriate routes will have on the PIX to direct traffic to the host through the gateway.

One last thing I want to say, is that when you want to avoid NAT for a device you want also other for access from a less secure PIX interface, you create usually a translation of static ip address of the device rather than a NAT 0. This is because with NAT 0 traffic must always be started indoors as the PIX fills the table of translation in this way.

I hope I don't end up confusing you.

Airport Extreme Double NAT / AT & T NVG510

My Internet connection has worked very well for several years, until recently, when the simple DSL modem (a Motorola 2210-02 - 1ATT) provided by AT & T began to experience intermittent outages. Initially, the DSL modem would lose the line for a minute or two at a time. But within 48 hours, the line started to drop during the hours in a row (synchronization failed line DSL). Whenever the modem has lost the line, my Airport Extreme (the router on my home network), shows a "Double NAT" alert. But whenever the modem 2210-02 DSL connection has been restored, alert the Airport Extreme's "Double NAT" disappeared.

After a day and a half problems, the line is down for so many hours that I finally called AT & T to check the status of our range. So, AT & T sent a technician who concluded fairly quickly the 2210-02-1ATT was the problem and replaced it with a modem/router combo (manufacturing date 11/2014) NVG510 (with router function disabled in the settings).

The speed that results and the quality of the connection via the NVG510 were good, so the tech packed 2210-02 in his bag and left. But now I get that alert "Double NAT" once again on my Airport Extreme, even if the home network is apparently working as well as it ever did.

The only setting I changed was on the NVG510 - as soon as the technology has left, I turned off the WiFi on the NVG510 function because I want the Airport Extreme to my router, same as always.

So far so good. After 24 hours with the NVG510 in place, the network worked well with no major hiccups, the only exception being the status of "Double NAT" alert displayed in Airport utility. In fact, had I have not bothered to watch Airport utility, I don't know that there was a "Double NAT" alert

Everything on the side of the NVG510 LAN is identical to what was in place with the 2210-02...

Airport Extreme 802.11ac works as "router" with the WiFi signal on another floor via an Airport Extreme 802.11n wireless (5th generation).

The WiFi signal provides web access to some desktop Mac, AppleTV, devices, mobile phones, tablet computers and a laptop (laptop is the only device that uses a VPN).

The network on the Airport Express 802.11ac, who serves as router, is "DHCP and NAT." and the "5th Gen," which extends the wireless network, set mode "bridge."

After hours of searching online, I understand that this problem is surely the result of the NVG510, and that this problem exists for at least five years. I've read at least a few tens of different ways to try a fix via adjustments to settings, but none reached the level of a real solution.

Although my network is no problem at the moment, I'm afraid that "Double NAT" alert is a sword of Damocles that will eventually crash my network, a situation I like to avoid. I dared not yet connect the laptop with a VPN to the router, but out of fear that will bring down the whole network.

I'd rather solve the "Double NAT" proactively.

Is there a a way to eliminate the Double "Nat" by adjusting the parameters of the NVG510 and/or the Airport Extreme? Or, my fears of future problems and a VPN disaster are unfounded?

Thank you

According to your comments, the NVG510 has not been reconfigured as a bridge and is providing routing functions (NAT & DHCP).

To resolve the Double NAT is the new Motorola NVG510 or AirPort Extreme needs to be reconfigured under a bridge. The simplest solution would be to reconfigure the extreme. In this way, the NVG510 can handle NAT & DHCP services required by clients of network connected to the extreme to access the Internet.

To reconfigure the extreme as a gateway, use the AirPort Utility, as follows:
- Run the AirPort Utility and then select the extreme.
- Click on Extreme and then, select Edit.
- Click the network tab to select it.
- Change the router Mode to: Off (bridge Mode)
- Click on update and allow extreme restart.

Static Nat issue unable to resolve everything tried.

Hello

I have a cisco asa 5515 with asa worm 9.4.1 and asdm 7.4

I have problem with configuring static nat, I have a server inside which ip is 172.16.1.85 and

my external interface is configured with a static ip address.

Internet works fine but cannot configure static nat...

Here's my config running if please check and let me know what Miss me...

Thank you

ASA release 9.4 (1)
!
ciscoasa hostname

names of
!
interface GigabitEthernet0/0
nameif outside
security-level 0
IP 151.253.97.182 255.255.255.248
!
interface GigabitEthernet0/1
nameif inside
security-level 100
IP 172.16.1.1 255.255.255.0
!
interface GigabitEthernet0/2
Shutdown
No nameif
no level of security
no ip address
!
interface GigabitEthernet0/3
Shutdown
No nameif
no level of security
no ip address
!
interface GigabitEthernet0/4
Shutdown
No nameif
no level of security
no ip address
!
interface GigabitEthernet0/5
Shutdown
No nameif
no level of security
no ip address
!
interface Management0/0
management only
nameif management
security-level 100
IP 192.168.1.1 255.255.255.0
!
boot system Disk0: / asa941-smp - k8.bin
passive FTP mode
object remote desktop service
source eq 3389 destination eq 3389 tcp service
Description remote desktop
network of the RDP_SERVER object
Home 172.16.1.85
outside_access_in list extended access allow desktop remotely any4 object RDP_SERVER
pager lines 24
asdm of logging of information
Outside 1500 MTU
Within 1500 MTU
management of MTU 1500
no failover
no monitor-service-interface module of
ICMP unreachable rate-limit 1 burst-size 1
ASDM image disk0: / asdm - 743.bin
don't allow no asdm history
ARP timeout 14400
no permit-nonconnected arp
!
network of the RDP_SERVER object
NAT (inside, outside) interface static service tcp 3389 3389
!
NAT source auto after (indoor, outdoor) dynamic one interface
Access-group outside_access_in in interface outside
Route outside 0.0.0.0 0.0.0.0 151.253.97.177 1
Timeout xlate 03:00
Pat-xlate timeout 0:00:30
Timeout conn 01:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
Sunrpc timeout 0:10:00 h323 0:05:00 h225 mgcp from 01:00 0:05:00 mgcp-pat 0:05:00
Sip timeout 0:30:00 sip_media 0:02:00 prompt Protocol sip-0: 03:00 sip - disconnect 0:02:00
Timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
Floating conn timeout 0:00:00
identity of the user by default-domain LOCAL
Enable http server
http server idle-timeout 50
http 192.168.1.0 255.255.255.0 management

Telnet 192.168.1.0 255.255.255.0 management
Telnet timeout 5
SSH stricthostkeycheck
SSH 192.168.1.0 255.255.255.0 management
SSH timeout 5
SSH group dh-Group1-sha1 key exchange
Console timeout 0
VPDN username bricks12 password * local store
management of 192.168.1.2 - dhcpd address 192.168.1.254
enable dhcpd management
!
a basic threat threat detection
Statistics-list of access threat detection
no statistical threat detection tcp-interception
dynamic-access-policy-registration DfltAccessPolicy
username, password imran guVrfhrJftPA/rQZ encrypted privilege 15
!
class-map inspection_default
match default-inspection-traffic
!
!
type of policy-card inspect dns preset_dns_map
parameters
maximum message length automatic of customer
message-length maximum 512
Policy-map global_policy
class inspection_default
inspect the preset_dns_map dns
inspect the ftp
inspect h323 h225
inspect the h323 ras
inspect the rsh
inspect the rtsp
inspect esmtp
inspect sqlnet
inspect the skinny
inspect sunrpc
inspect xdmcp
inspect the sip
inspect the netbios
inspect the tftp
Review the ip options
!
global service-policy global_policy
context of prompt hostname
anonymous reporting remote call

ciscoasa #.

Hello

Change this ACL: -.

outside_access_in list extended access allow desktop remotely any4 object RDP_SERVER

TO

outside_access_in list extended access allowed object RDP_SERVER eq any4 tcp 3389

Thank you and best regards,

Maryse Amrodia

Win2K NAT would be from 1650 to a PIX 515 - does not

Hello

:

I have a working VPN config on my 515 (6.2.2) and can tunnel from one host with a valid external IP without any problem. But, with a NAT would be customer, nothing seems to work.

I use RADIUS to authenticate after using a password for the group. Here is the sequence of events.

(1) client machine as a 10.0.0.1 address, NAT had a public address to come into the port of 'outside '.

(2) the client connects, the user enters GANYMEDE password and is connected.

(3) the user tries to browse any service and can not.

(4) if the user switches DNS to an external server, the portion of the split tunnel internet works fine but inside is still broken.

(5) clients with static IP addresses that are publicly routable connect and can perform all internal and external activities of split tunnel.

Excerpts from config. I'm doing something wrong?

Permitted connection ipsec sysopt

No sysopt route dnat

Crypto ipsec transform-set esp - esp-md5-hmac noaset

Crypto dynnoamap dynamic-map 10 transform-set noaset

noamap 10 card crypto ipsec-isakmp dynamic dynnoamap

Harpy of authentication card crypto client noamap

noamap interface card crypto outside

ISAKMP allows outside

ISAKMP identity address

part of pre authentication ISAKMP policy 10

encryption of ISAKMP policy 10

ISAKMP policy 10 md5 hash

10 2 ISAKMP policy group

ISAKMP life duration strategy 10 86400

vpngroup address noapool pool noagroup

vpngroup dns 66.119.192.1 Server noagroup

vpngroup noagroup wins server - 66.119.192.4

vpngroup noagroup by default-field noanet.net

vpngroup split-tunnel vpn - IP noagroup

vpngroup idle 3600 noagroup-time

vpngroup password noagroup *.

Help and thanks in advance.

Mike

You do not have something wrong. The problem is that NAT (NAT actually PAT, port) and IPSec is not working very well, and many features PAT can PAT IPSec traffic to all (PIX included until version 6.3).

The problem is that PAT depends on using the port number TCP or UDP source as a way to differentiate between sessions, because they are all PAT would be from the same source IP address. However IPSec (ESP at least), tracks right on top of IP, in other words, it is NOT a TCP or UDP protocol, and therefore has no associated port number. It breaks most of the PAT devices.

The reason for which you can build your tunnel initially, it is that it is all done by ISAKMP, which is a UDP protocol, which can be PAT would be fine. Once the tunnel is built however, all encrypted data are sent by packs of ESP, which as I said, is not a TCP or UDP protocol.

Trnalsations NAT static work cause they do not rely on the use of the port number, they just change the address of the source that works very well with ESP.

There is not much you can do about it. If you were closing the VPN into a VPN3000 concentrator, it has a feature called IPSec through NAT, which encapsulates all ESP packets in a UDP packet, which can then be PAT would be properly. The PIX, unfortunately, doesn't have this feature. The only solution is to get a NAT device that manages properly the IPSEc. Surprisingly, some of the less expensive devices on the market handle it, but you should check with each manufacturer to be sure.

VPN on ASA 5506 without internet access, help with NAT?

Hello

I have upgraded to a Cisco ASA 5505 to a 5506 X and as such have climbed to ASA 9.5

For this reason, I'm a bit stuck on how to implement the VPN. I followed the wizard and I can now establish inbound connections, but when connected (all traffic is tunnel) there is no internet connectivity.

Our offices internal (inside) network is 192.168.2.0/24

Our VPN pool is 192.168.4.0/24

I guess that I'm missing a NAT rule, but in all honesty, I'm a user ASDM and as everything is changed, I am struggling to recreate it?

Here is my config:

Result of the command: "sh run"

: Saved

:
: Serial Number: JAD194306H5
: Hardware:   ASA5506, 4096 MB RAM, CPU Atom C2000 series 1250 MHz, 1 CPU (4 cores)
:
ASA Version 9.5(1)
!
hostname ciscoasanew
domain-name work.internal
enable password ... encrypted
names
ip local pool RemoteVPNPool 192.168.4.1-192.168.4.254 mask 255.255.255.0
!
interface GigabitEthernet1/1
 nameif outside
 security-level 0
 ip address 192.168.3.4 255.255.255.0
!
interface GigabitEthernet1/2
 nameif inside
 security-level 100
 ip address 192.168.2.197 255.255.255.0
!
interface GigabitEthernet1/3
 shutdown
 no nameif
 no security-level
 no ip address
!
interface GigabitEthernet1/4
 shutdown
 no nameif
 no security-level
 no ip address
!
interface GigabitEthernet1/5
 shutdown
 no nameif
 no security-level
 no ip address
!
interface GigabitEthernet1/6
 shutdown
 no nameif
 no security-level
 no ip address
!
interface GigabitEthernet1/7
 shutdown
 no nameif
 no security-level
 no ip address
!
interface GigabitEthernet1/8
 shutdown
 no nameif
 no security-level
 no ip address
!
interface Management1/1
 management-only
 nameif management
 security-level 100
 ip address 192.168.1.1 255.255.255.0
!
ftp mode passive
clock timezone GMT 0
dns domain-lookup inside
dns domain-lookup management
dns server-group DefaultDNS
 name-server 192.168.2.199
 domain-name work.internal
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
object network obj_any
 subnet 0.0.0.0 0.0.0.0
object network 173.0.82.0
 host 173.0.82.0
object network 173.0.82.1
 subnet 66.211.0.0 255.255.255.0
object network 216.113.0.0
 subnet 216.113.0.0 255.255.255.0
object network 64.4.0.0
 subnet 64.4.0.0 255.255.255.0
object network 66.135.0.0
 subnet 66.135.0.0 255.255.255.0
object network a
 host 192.168.7.7
object network devweb
 host 192.168.2.205
object network DevwebSSH
 host 192.168.2.205
object network DEV-WEB-SSH
 host 192.168.2.205
object network DEVWEB-SSH
 host 192.168.2.205
object network vpn-network
 subnet 192.168.4.0 255.255.255.0
object network NETWORK_OBJ_192.168.4.0_24
 subnet 192.168.4.0 255.255.255.0
object network NETWORK_OBJ_192.168.2.0_24
 subnet 192.168.2.0 255.255.255.0
object-group network EC2ExternalIPs
 network-object host 52.18.73.220
 network-object host 54.154.134.173
 network-object host 54.194.224.47
 network-object host 54.194.224.48
 network-object host 54.76.189.66
 network-object host 54.76.5.79
object-group network PayPal
 network-object object 173.0.82.0
 network-object object 173.0.82.1
 network-object object 216.113.0.0
 network-object object 64.4.0.0
 network-object object 66.135.0.0
object-group service DM_INLINE_SERVICE_1
 service-object icmp
 service-object icmp6
 service-object icmp alternate-address
 service-object icmp conversion-error
 service-object icmp echo
 service-object icmp information-reply
 service-object icmp information-request
access-list outside_access_in extended permit tcp object-group EC2ExternalIPs object DEVWEB-SSH eq ssh
access-list outside_access_in remark AWS Servers
access-list outside_access_in extended permit tcp object-group EC2ExternalIPs object devweb eq ssh log debugging inactive
access-list outside_access_in extended permit ip any any inactive
access-list outside_access_in remark Ping reply
access-list outside_access_in extended permit object-group DM_INLINE_SERVICE_1 any interface outside
access-list outside_access_in remark Alarm
access-list outside_access_in extended permit tcp any interface outside eq 10001
access-list outside_access_in remark CCTV
access-list outside_access_in extended permit tcp any interface outside eq 7443
access-list outside_access_in extended deny ip any any
access-list workvpn_splitTunnelAcl_1 standard permit 192.168.2.0 255.255.255.0
access-list workvpn_splitTunnelAcl_1 standard permit 162.13.130.12 255.255.255.252
access-list workvpn_splitTunnelAcl_1 standard permit 162.13.133.72 255.255.255.252
access-list workvpn_splitTunnelAcl_1 standard permit 164.177.128.200 255.255.255.252
access-list workvpn_splitTunnelAcl_1 standard permit 164.177.132.16 255.255.255.252
access-list workvpn_splitTunnelAcl_1 standard permit 164.177.132.72 255.255.255.252
access-list workvpn_splitTunnelAcl_1 standard permit 212.64.147.184 255.255.255.248
access-list workvpn_splitTunnelAcl_1 standard permit 95.138.147.116 255.255.255.254
access-list workvpn_splitTunnelAcl_1 standard permit 95.138.147.118 255.255.255.254
access-list workvpn_splitTunnelAcl_1 standard permit host 95.138.147.118
access-list workvpn_splitTunnelAcl_1 standard permit 95.138.147.120 255.255.255.254
access-list inside_nat0_outbound extended permit ip 192.168.2.0 255.255.255.0 192.168.4.0 255.255.255.0
access-list workvpn2_splitTunnelAcl standard permit 192.168.2.0 255.255.255.0
access-list workVPN2016_splitTunnelAcl standard permit 192.168.2.0 255.255.255.0
pager lines 24
logging enable
logging buffer-size 16000
logging asdm-buffer-size 512
logging asdm warnings
logging flash-bufferwrap
mtu outside 1500
mtu inside 1500
mtu management 1500
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 7200
no arp permit-nonconnected
nat (inside,outside) source static NETWORK_OBJ_192.168.2.0_24 NETWORK_OBJ_192.168.2.0_24 destination static NETWORK_OBJ_192.168.4.0_24 NETWORK_OBJ_192.168.4.0_24 no-proxy-arp route-lookup
!
object network obj_any
 nat (any,outside) dynamic interface
object network DEVWEB-SSH
 nat (inside,outside) static interface service tcp ssh ssh
access-group outside_access_in in interface outside
route outside 0.0.0.0 0.0.0.0 192.168.3.3 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
user-identity default-domain LOCAL
http server enable
http 192.168.1.0 255.255.255.0 inside
http 192.168.2.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
service sw-reset-button
crypto ipsec ikev1 transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-DES-SHA esp-des esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac
crypto ipsec security-association pmtu-aging infinite
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set pfs group1
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set ikev1 transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA ESP-3DES-MD5 ESP-DES-SHA ESP-DES-MD5
crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map outside_map interface outside
crypto ca trustpoint _SmartCallHome_ServerCA
 no validation-usage
 crl configure
crypto ca trustpoint ASDM_Launcher_Access_TrustPoint_0
 enrollment self
 fqdn none
 subject-name CN=192.168.2.197,CN=ciscoasanew
 keypair ASDM_LAUNCHER
 crl configure

snip

dhcpd auto_config outside
!
dhcpd address 192.168.1.2-192.168.1.254 management
dhcpd enable management
!
no threat-detection basic-threat
threat-detection statistics port
threat-detection statistics protocol
threat-detection statistics access-list
threat-detection statistics tcp-intercept rate-interval 30 burst-rate 400 average-rate 200
ssl trust-point ASDM_Launcher_Access_TrustPoint_0 inside
ssl trust-point ASDM_Launcher_Access_TrustPoint_0 inside vpnlb-ip
group-policy DfltGrpPolicy attributes
 vpn-tunnel-protocol ssl-client
group-policy workVPN2016 internal
group-policy workVPN2016 attributes
 dns-server value 192.168.2.199
 vpn-tunnel-protocol ikev1
 split-tunnel-policy tunnelall
 ipv6-split-tunnel-policy tunnelall
 default-domain value work.internal
 split-dns value work.internal
 split-tunnel-all-dns enable
dynamic-access-policy-record DfltAccessPolicy

!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum client auto
  message-length maximum 512
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map
  inspect ftp
  inspect h323 h225
  inspect h323 ras
  inspect rsh
  inspect rtsp
  inspect esmtp
  inspect sqlnet
  inspect skinny
  inspect sunrpc
  inspect xdmcp
  inspect sip
  inspect netbios
  inspect tftp
  inspect ip-options
!
service-policy global_policy global
prompt hostname context
call-home reporting anonymous
hpm topN enable
Cryptochecksum:
: end

Hi Ben-

What you are trying to accomplish is called VPN crossed. Depending on your initial configuration, you have 2 NAT problems. The first has to do with the NAT you place your order. In the code later that we are dealing with two NAT ASA 8.3 times and who are ranked 2 sections going on before and after the device NAT. object

My general rule for control of NAT is like this:

Twice NAT (front) - use this section for exemptions from NAT or unusual configurations that have to go first
Purpose of NAT - Use this section to the static NAT instructions for servers
Twice NAT (after) - use this section to your global declarations of NAT, basically a catch-all

Then, never use 'all' as an interface for all training of NAT. This may seem like a good idea, but it will bite you. Remember, it is more the notion of control NAT, then 'all' interface is bit VPN configurations and similar DMZ. Always be specific about your interface for NAT pairs.

To this end, here is what I suggest that your NAT configuration should resemble:

nat (inside,outside) source static NETWORK_OBJ_192.168.2.0_24 NETWORK_OBJ_192.168.2.0_24 destination static NETWORK_OBJ_192.168.4.0_24 NETWORK_OBJ_192.168.4.0_24 no-proxy-arp route-lookup!object network DEVWEB-SSH nat (inside,outside) static interface service tcp ssh ssh !nat (inside,outside) after-auto source dynamic any interfacenat (outside,outside) after-auto source dynamic any interface

The key is that you need a NAT device explicitly reflecting the VPN traffic. PSC

ASA 5505 as internet gateway (must reverse NAT)

Hi all the Cisco guru

I have this diet:

Office-> Cisco 877-> Internet-> ASA 5505-> remote network

Office network: 192.168.10.0/24

Cisco 877 IP internal: 192.168.10.200

Cisco 877 external IP: a.a.a.a

ASA 5505 external IP: b.b.b.b

ASA 5505 internal IP: 192.168.1.3 and 192.168.17.3

Remote network: 192.168.17.0/24 and 192.168.1.0/24

VPN tunnel is OK and more. I have the Office Access to the remote network and the remote network access to the bureau by the tunnel.

But when I try to access the network remotely (there are 2 VLANS: management and OLD-private) to the internet, ASA answer me:

305013 *. * NAT rules asymetrique.64.9 matched 53 for flows forward and backward; Connection for udp src OLD-Private:192.168.17.138/59949 dst WAN:*.*.64.9/53 refused due to path failure reverse that of NAT

Ping of OLD-private interface to google result:

110003 192.168.17.2 0 66.102.7.104 0 routing cannot locate the next hop for icmp NP identity Ifc:192.168.17.2/0 to OLD-Private:66.102.7.104/0

Result of traceroute

How can I fix reverse NAT and make ASA as internet gateway?

There is my full config

!
ASA Version 8.2 (2)
!
hostname ASA2
domain default.domain.invalid
activate the encrypted password password
encrypted passwd password
names of
!
interface Vlan1
Description INTERNET
1234.5678.0002 Mac address
nameif WAN
security-level 100
IP address b.b.b.b 255.255.248.0
OSPF cost 10
!
interface Vlan2
OLD-PRIVATE description
1234.5678.0202 Mac address
nameif OLD-private
security-level 0
IP 192.168.17.3 255.255.255.0
OSPF cost 10
!
interface Vlan6
Description MANAGEMENT
1234.5678.0206 Mac address
nameif management
security-level 0
192.168.1.3 IP address 255.255.255.0
OSPF cost 10
!
interface Ethernet0/0
!
interface Ethernet0/1
Shutdown
!
interface Ethernet0/2
Shutdown
!
interface Ethernet0/3
Shutdown
!
interface Ethernet0/4
Shutdown
!
interface Ethernet0/5
Shutdown
!
interface Ethernet0/6
switchport trunk allowed vlan 2.6
switchport mode trunk
!
interface Ethernet0/7
Shutdown
!
connection of the banner * W A R N I N G *.
banner connect unauthorized access prohibited. All access is
connection banner monitored, and intruders will be prosecuted
connection banner to the extent of the law.
Banner motd * W A R N I N G *.
Banner motd unauthorised access prohibited. All access is
Banner motd monitored and trespassers will be prosecuted
Banner motd to the extent of the law.
boot system Disk0: / asa822 - k8.bin
passive FTP mode
DNS domain-lookup WAN
DNS server-group DefaultDNS
Server name dns.dns.dns.dns
domain default.domain.invalid
permit same-security-traffic intra-interface
object-group Protocol TCPUDP
object-protocol udp
object-tcp protocol
object-group service RDP - tcp
RDP description
EQ port 3389 object
Access extensive list ip 192.168.17.0 LAN_nat0_outbound allow 255.255.255.0 192.168.10.0 255.255.255.0
Standard access list LAN_IP allow 192.168.17.0 255.255.255.0
WAN_access_in list of allowed ip extended access all any debug log
WAN_access_in list extended access permitted ip OLD-private interface WAN newspaper inactive debugging interface
WAN_access_in list extended access permit tcp any object-group RDP any RDP log debugging object-group
MANAGEMENT_access_in list of allowed ip extended access all any debug log
access-list extended OLD-PRIVATE_access_in any allowed ip no matter what debug log
access-list OLD-PRIVATE_access_in extended permit ip 192.168.10.0 255.255.255.0 192.168.17.0 255.255.255.0 inactive debug log
OLD-PRIVATE_access_in allowed extended object-group TCPUDP host 192.168.10.7 access-list no matter how inactive debug log
access-list OLD-PRIVATE_access_in allowed extended icmp host 192.168.10.254 interface private OLD newspaper inactive debugging
access-list OLD-PRIVATE_access_in allowed extended icmp host 192.168.17.155 interface private OLD newspaper debugging
access-list 101 extended allow host tcp 192.168.10.7 any eq 3389 debug log
Access extensive list ip 192.168.17.0 WAN_1_cryptomap allow 255.255.255.0 192.168.10.0 255.255.255.0
WAN_1_cryptomap to access ip 192.168.1.0 scope list allow 255.255.255.0 192.168.10.0 255.255.255.0
WAN_cryptomap_2 to access ip 192.168.1.0 scope list allow 255.255.255.0 192.168.10.0 255.255.255.0
Capin list extended access permit ip host 192.18.17.155 192.168.10.7
Capin list extended access permit ip host 192.168.10.7 192.168.17.155
LAN_access_in list of allowed ip extended access all any debug log
Access extensive list ip 192.168.17.0 WAN_nat0_outbound allow 255.255.255.0 192.168.10.0 255.255.255.0
Access extensive list ip 192.168.17.0 WAN_2_cryptomap allow 255.255.255.0 192.168.10.0 255.255.255.0

permit inside_nat0_outbound to access extended list ip 192.168.10.0 255.255.255.0 192.168.17.0 255.255.255.0
pager lines 24
Enable logging
recording of debug trap
logging of debug asdm
Debugging trace record
Debug class auth record trap
MTU 1500 WAN
MTU 1500 OLD-private
MTU 1500 management
mask 192.168.1.150 - 192.168.1.199 255.255.255.0 IP local pool VPN_Admin_IP
no failover
ICMP unreachable rate-limit 1 burst-size 1
ICMP permitted host a.a.a.a WAN
ICMP deny any WAN
ICMP permitted host 192.168.10.7 WAN
ICMP permitted host b.b.b.b WAN
ASDM image disk0: / asdm - 631.bin
don't allow no asdm history
ARP timeout 14400
Global (OLD-private) 1 interface
Global interface (management) 1
NAT (WAN) 1 0.0.0.0 0.0.0.0

inside_nat0_outbound (WAN) NAT 0 access list
WAN_access_in access to the WAN interface group
Access-group interface private-OLD OLD-PRIVATE_access_in
Access-group MANAGEMENT_access_in in the management interface
Route WAN 0.0.0.0 0.0.0.0 b.b.b.185 1
Timeout xlate 03:00
Timeout conn 01:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
Sunrpc timeout 0:10:00 h323 0:05:00 h225 mgcp from 01:00 0:05:00 mgcp-pat 0:05:00
Sip timeout 0:30:00 sip_media 0:02:00 prompt Protocol sip-0: 03:00 sip - disconnect 0:02:00
Timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-registration DfltAccessPolicy
the ssh LOCAL console AAA authentication
local AAA authentication attempts 10 max in case of failure
Enable http server
http 192.168.1.0 255.255.255.0 WAN
http 0.0.0.0 0.0.0.0 WAN
http b.b.b.b 255.255.255.255 WAN
No snmp server location
No snmp Server contact
Server enable SNMP traps snmp authentication linkup, linkdown cold start
Service resetoutside
Crypto ipsec transform-set ESP-DES-SHA esp - esp-sha-hmac
Crypto ipsec transform-set esp-SHA-ESP-3DES-3des esp-sha-hmac
life crypto ipsec security association seconds 28800
Crypto ipsec kilobytes of life - safety 4608000 association
card crypto WAN_map 1 corresponds to the address WAN_1_cryptomap
card crypto WAN_map 1 set peer a.a.a.a
WAN_map 1 transform-set ESP-DES-SHA crypto card game
card crypto WAN_map WAN interface
ISAKMP crypto enable WAN
crypto ISAKMP policy 10
preshared authentication
3des encryption
sha hash
Group 2
life 86400
crypto ISAKMP policy 30
preshared authentication
the Encryption
sha hash
Group 1
life 86400
Telnet timeout 5
SSH a.a.a.a 255.255.255.255 WAN
SSH timeout 30
SSH version 2
Console timeout 0
dhcpd auto_config management
!

a basic threat threat detection
host of statistical threat detection
Statistics-list of access threat detection
a statistical threat detection tcp-interception rate-interval 30 burst-400-rate average rate 200
NTP server 129.6.15.28 source WAN prefer
WebVPN
attributes of Group Policy DfltGrpPolicy
Protocol-tunnel-VPN IPSec l2tp ipsec svc webvpn
internal admin group strategy
group admin policy attributes
DNS.DNS.DNS.DNS value of DNS server
Protocol-tunnel-VPN IPSec
Split-tunnel-policy tunnelspecified
value of Split-tunnel-network-list LAN_IP
privilege of encrypted password password username administrator 15
type tunnel-group admin remote access
tunnel-group admin general attributes
address pool VPN_Admin_IP
strategy-group-by default admin
tunnel-group a.a.a.a type ipsec-l2l
tunnel-group a.a.a.a general-attributes
strategy-group-by default admin
a.a.a.a group of tunnel ipsec-attributes
pre-shared-key *.
NOCHECK Peer-id-validate
!
class-map inspection_default
match default-inspection-traffic
!
!
type of policy-card inspect dns preset_dns_map
parameters
maximum message length automatic of customer
message-length maximum 512
Policy-map global_policy
class inspection_default
inspect the preset_dns_map dns
inspect the ftp
inspect h323 h225
inspect the h323 ras
inspect the rsh
inspect the rtsp
inspect esmtp
inspect sqlnet
inspect the skinny
inspect sunrpc
inspect xdmcp
inspect the sip
inspect the netbios
inspect the tftp
Review the ip options
!

Thank you for your time and help

Why you use this NAT type?

Access extensive list ip 192.168.17.0 WAN_nat0_outbound allow 255.255.255.0 any
NAT (OLD-private) 0-list of access WAN_nat0_outbound

You are basically saying the ASA not NAT traffic. This private IP address range is not routed on the Internet. This traffic is destined to be sent over the Internet? If so, that LAC should then not be there.

If you want NAT traffic to one IP public outside the ASA, you must remove this line and let the NAT and GLOBAL work:

NAT (OLD-private) 1 0.0.0.0 0.0.0.0

Global (WAN) 1 interface

nat ASA 5520 problem

Hi I have a Cisco Asa 5520 and I want to vpn site-to-site by using another interface with a carrier of lan to lan, the problem is when I try to pass traffic have the syslog error to follow:

No translation not found for udp src lan2lan:10.5.50.63/44437 dst colo: biggiesmalls groups / 897

LAN to LAN service interface is called: lan2lan
one of the internal interfaces is called: colo

I think that is problem with Nat on the SAA but I need help with this.

Config:

!
interface GigabitEthernet0/0
nameif outside
security-level 0
eve of fw - ext 255.255.255.0 address IP XXaaaNNaa
OSPF cost 10
OSPF network point-to-point non-broadcast
!
interface GigabitEthernet0/1
No nameif
no level of security
no ip address
!
interface GigabitEthernet0/1.50
VLAN 50
nameif lb
security-level 20
IP 10.1.50.11 255.255.255.0
OSPF cost 10
!
interface GigabitEthernet0/1,501
VLAN 501
nameif colo
security-level 90
eve of fw - int 255.255.255.0 172.16.2.253 IP address
OSPF cost 10
!
!
interface GigabitEthernet1/1
Door-Lan2Lan description
nameif lan2lan
security-level 0
IP 10.100.50.1 255.255.255.248
!
access extensive list ip 10.1.0.0 lan2lan_cryptomap_51 allow 255.255.0.0 object-group elo
permit access list extended ip sfnet 255.255.255.0 lan2lan_cryptomap_51 object-group elo
pager lines 24
Enable logging
host colo biggiesmalls record
No message logging 313001
External MTU 1500
MTU 1500 lb
MTU 1500 Colo
lan2lan MTU 1500
ICMP unreachable rate-limit 1 burst-size 1
ARP timeout 14400
NAT-control
Global 1 interface (external)
interface of global (lb) 1
Global (colo) 1 interface
NAT (lb) 1 10.1.50.0 255.255.255.0
NAT (colo) - access list 0 colo_nat0_outbound
NAT (colo) 1 10.1.13.0 255.255.255.0
NAT (colo) 1 10.1.16.0 255.255.255.0
NAT (colo) 1 0.0.0.0 0.0.0.0
external_access_in access to the external interface group
Access-group lb_access_in in lb interface
Access-group colo_access_in in interface colo
Access-group management_access_in in management of the interface
Access-group interface lan2lan lan2lan
!
Service resetoutside
card crypto match 51 lan2lan_map address lan2lan_cryptomap_51
lan2lan_map 51 crypto map set peer 10.100.50.2
card crypto lan2lan_map 51 game of transformation-ESP-3DES-SHA
crypto lan2lan_map 51 set reverse-road map
lan2lan_map interface lan2lan crypto card
quit smoking
ISAKMP crypto identity hostname
ISAKMP crypto enable lan2lan
crypto ISAKMP policy 10
preshared authentication
3des encryption
sha hash
Group 2
life 86400
Crypto isakmp nat-traversal 20
enable client-implementation to date
IPSec-attributes tunnel-group DefaultL2LGroup
pre-shared-key xxXnnAA
tunnel-group 10.100.50.2 type ipsec-l2l
tunnel-group 10.100.50.2 General-attributes
Group Policy - by default-site2site
No vpn-addr-assign aaa
No dhcp vpn-addr-assign
Telnet timeout 5
!

The VPN is OK? ("' isakmp crypto to show his" should show a MM_Active tunnel to the peer address ")

Normally exempt us VPN site-to-site of NAT traffic. This could be your problem. If you can share your configuration, we can have a look.

p.s. you should affect the question of the security / VPN forum.

Cannot ping inside the vpn client hosts. It's a NAT problem

Hello everyone, I'm running into what seems to be a cause of exclusion with an IOS IPSEC VPN NAT/nat. I can connect to the VPN with cisco IPSEC VPN client, and I am able to authenticate. Once I have authenticate, I'm not able to reach one of the guests inside. Below is my relevant config. Any help would be greatly appreciated.

AAA new-model

!

!

AAA authentication login default local

radius of group AAA authentication login userauthen

AAA authorization exec default local

AAA authorization groupauthor LAN

crypto ISAKMP policy 3

BA 3des

preshared authentication

Group 2

!

ISAKMP crypto client configuration group businessVPN

key xxxxxx

DNS 192.168.10.2

business.local field

pool vpnpool

ACL 108

Crypto isakmp VPNclient profile

businessVPN group identity match

client authentication list userauthen

ISAKMP authorization list groupauthor

client configuration address respond

!

!

Crypto ipsec transform-set esp-3des esp-sha-hmac RIGHT

!

Crypto-map dynamic dynmap 10

Set transform-set RIGHT

Define VPNclient isakmp-profile

market arriere-route

!

!

10 ipsec-isakmp crypto map clientmap Dynamics dynmap

interface Loopback0

IP 10.1.10.2 255.255.255.252

no ip redirection

no ip unreachable

no ip proxy-arp

IP virtual-reassembly

!

Null0 interface

no ip unreachable

!

interface FastEthernet0/0

IP 111.111.111.138 255.255.255.252

IP access-group outside_in in

no ip redirection

no ip unreachable

no ip proxy-arp

NAT outside IP

inspect the outgoing IP outside

IP virtual-reassembly

automatic duplex

automatic speed

clientmap card crypto

!

the integrated-Service-Engine0/0 interface

description Locator is initialized with default IMAP group

IP unnumbered Loopback0

no ip redirection

no ip unreachable

no ip proxy-arp

IP virtual-reassembly

ip address of service-module 10.1.10.1 255.255.255.252

Service-module ip default gateway - 10.1.10.2

interface BVI1

IP 192.168.10.1 255.255.255.0

no ip redirection

no ip unreachable

no ip proxy-arp

IP nat inside

IP virtual-reassembly

IP nat inside source static tcp 192.168.10.2 25 interface FastEthernet0/0 25

IP nat inside source static tcp 192.168.10.2 443 interface FastEthernet0/0 443

IP nat inside source static tcp 192.168.10.2 3389 interface FastEthernet0/0 3389

IP nat inside source map route nat interface FastEthernet0/0 overload

nat extended IP access list

deny ip 192.168.10.0 0.0.0.255 192.168.109.0 0.0.0.255

refuse the 10.1.1.0 ip 0.0.0.255 192.168.109.0 0.0.0.255

ip licensing 10.1.1.0 0.0.0.255 any

permit ip 192.168.10.0 0.0.0.255 any

sheep extended IP access list

permit ip 192.168.10.0 0.0.0.255 192.168.109.0 0.0.0.255

ip permit 10.1.10.0 0.0.0.255 192.168.109.0 0.0.0.255

ip licensing 10.1.1.0 0.0.0.255 192.168.109.0 0.0.0.255

outside_in extended IP access list

permit tcp object-group Yes_SMTP host 111.111.111.138 eq smtp

permit any any eq 443 tcp

permit tcp 20.20.20.96 0.0.0.31 host 111.111.111.138 eq 3389

permit tcp 20.20.20.96 0.0.0.31 host 111.111.111.138 eq 22

allow any host 111.111.111.138 esp

allow any host 111.111.111.138 eq isakmp udp

allow any host 111.111.111.138 eq non500-isakmp udp

allow any host 111.111.111.138 ahp

allow accord any host 111.111.111.138

access-list 108 allow ip 192.168.109.0 0.0.0.255 192.168.10.0 0.0.0.255

access-list 108 allow ip 192.168.109.0 0.0.0.255 10.1.1.0 0.0.0.255

access-list 108 allow ip 192.168.109.0 0.0.0.255 10.1.10.0 0.0.0.255

!

!

!

!

route nat allowed 10 map

match ip address nat

1 channel ip bridge

In my view, the acl applied to customer is back. It must allow traffic from the internal network to the pool of customers.

To confirm, you can open the Cisco VPN client statistics (after login) then go in the route Details tab. We should see the networks you should be able to reach the customer. Make sure that the good ones are here.

Kind regards

Static nat and NAT ACL 0

All,

I have nat 0 ACL indicating that an ip address should not be natted, while a static nat statement saying we need natted. I just want to know that we will have precedence.

Thank you

It is of the order of operations PIX nat / ASA.

the NAT 0 acl_name (nameif) has priority.

1 nat 0-list of access (free from nat)

2. match the existing xlates

3. match the static controls

a. static NAT with no access list

b. static PAT with no access list

4. match orders nat

a. nat [id] access-list (first match)

b. nat [id] [address] [mask] (best match)

i. If the ID is 0, create an xlate identity

II. use global pool for dynamic NAT

III. use global dynamic pool for PAT

NAT NAT_T &amp; identity

Similar Questions

Maybe you are looking for

NAT NAT_T & identity