VPN NAT help
I need to configure NAT on a VPN tunnel to accomplish the following. I already have the tunnel upward and running just need to confirm my NAT config.
ASA 8.2 Version running (5)
I only need to set up A
The internal subnet to site A is 172.30.6.0/24 and I need NAT this subnet to 172.31.183.0/24 when the destination subnet is 172.31.255.128/25
So here's what I thought.
Policy NAT 172.30.6.0/24 to 172.31.183.0/24 the translation when the destination is 172.31.255.128/25.
Public static 172.31.183.0 (inside, outside) - CBC-NAT-TRANSLATION access list
CBC-NAT-TRANSLATION scope ip 172.30.6.0 access list allow 255.255.255.0 172.31.255.128 255.255.255.128
Then I would need that
Public static 172.31.255.128 (exterior, Interior) 172.30.6.0 netmask 255.255.255.0
That sounds about right.
As I said that I did not use a network with a static NAT strategy, so I don't know if the host part of the IP address matches the host Party in the range NAT if you see what I mean.
It could, but it cannot be a concern for you anyway. You would need to watch the xlate table once you make the connection to know for sure.
In addition, it means all devices in this subnet may send packets to each device in the remote subnet but once again can not be a cause for concern.
But apart from that, Yes, your config seems fine for me.
I try with the first beach and establish a connection and then if it works check the xlate dashboard to see exactly what IP he chose.
Tags: Cisco Security
I need to configure vpn NAT ip address traffic external pool ASA
Apart from the ip address is 188.8.131.52
VPN traffic must be nat to 184.108.40.206
If I try to configure policy nat or static nat ASA gives me error "global address of overlap with mask.
Please, help me to solve this problem.
Thank you best regards &,.
Thank you, and since you are just 1 IP 220.127.116.11 Polo, the traffic can only be initiated from your site to the remote end.
Here is the configuration of NAT:
access list nat - vpn ip 192.168.1.0 allow 255.255.255.0 10.0.0.0 255.255.0.0
NAT (inside) 5 access list nat - vpn
Overall 5 18.104.22.168 (outside)
In addition, the ACL crypto for the tunnel from site to site should be as follows:
access-list allow 22.214.171.124 ip host 10.0.0.0 255.255.0.0
Hope that helps.
I have problems with a VPN on 2 routers access 8xx: I am trying to set up a quick and dirty VPN Site to Site with a source NAT VPN tunnel endpoint. This configuration is only intended to run from one day only inter. I managed to do the work of VPN and I traced the translations of NAT VPN tunnel endpoint, but I couldn't make these translated packages which must move outside the access router, because intended to be VPN traffic network is not directly connected to leave the router. However, I can ping the hosts directly connected to the router for access through the VPN.
Something done routing not to work, I don't think the NATing, because I tried to remove the NAT and I couldn't follow all outgoing packets that must be sent, so I suspect this feature is not included in the IOS of the range of routers Cisco 8xx.
I'm that extends the features VPN + NAT + routing too, or is there a configuration error in my setup?
This is the configuration on the router from Cisco 8xx (I provided only the VPN endpoint, as the works of VPN endpoint)
VPN endpoints: 10.20.1.2 and 10.10.1.2
routing to 192.168.2.0 is necessary to 192.168.1.2 to 192.168.1.254
From 172.31.0.x to 192.168.1.x
no service button
horodateurs service debug datetime msec
Log service timestamps datetime msec
encryption password service
enable secret 5 xxxxxxxxxxxxxxx
No aaa new-model
no ip cef
IP domain name xxxx.xxxx
Authenticated MultiLink bundle-name Panel
username root password 7 xxxxxxxxxxxxxx
crypto ISAKMP policy 10
ISAKMP crypto key address 10.20.1.2 xxxxxxxxxxxxx
Crypto ipsec transform-set esp-3des esp-sha-hmac VPN-TRANSFORMATIONS
CRYPTOMAP 10 ipsec-isakmp crypto map
defined by peer 10.20.1.2
game of transformation-VPN-TRANSFORMATIONS
match address 100
The config log
LAN controller 0
no ip address
switchport access vlan 12
No cdp enable
card crypto CRYPTOMAP
switchport access vlan 2
No cdp enable
switchport access vlan 2
No cdp enable
switchport access vlan 2
No cdp enable
no ip address
IP 192.168.1.1 255.255.255.248
NAT outside IP
10.10.1.2 IP address 255.255.255.0
IP nat inside
card crypto CRYPTOMAP
IP forward-Protocol ND
IP route 192.168.2.0 255.255.255.0 192.168.1.254
IP route 10.20.0.0 255.255.0.0 10.10.1.254
Route IP 172.31.0.0 255.255.0.0 Vlan12
no ip address of the http server
no ip http secure server
IP nat inside source static 172.31.0.2 192.168.1.11
IP nat inside source 172.31.0.3 static 192.168.1.12
access-list 100 permit ip 192.168.1.0 0.0.0.255 172.31.0.0 0.0.255.255
access-list 100 permit ip 192.168.2.0 0.0.0.255 172.31.0.0 0.0.255.255
Line con 0
no activation of the modem
line to 0
line vty 0 4
password 7 xxxxxxxxx
opening of session
max-task-time 5000 Planner
First of all, when I went through your config, I saw these lines,
IP 192.168.1.1 255.255.255.248
IP route 192.168.2.0 255.255.255.0 192.168.1.254
With 255.255.255.248 192.168.1.1 and 192.168.1.254 subnet will fall to different subnets. So I don't think you can join 192.168.2.0/24 subnet to the local router at this point. I think you should fix that first.
Maybe have 192.168.1.2 255.255.255. 248 on the router connected (instead of 192.168.1.254)
Once this has been done. We will have to look at routing.
You are 172.31.0.2-> 192.168.1.11 natting
Now, in order for that to work, make sure that a source addresses (192.168.1.11) NAT is outside the subnet router to router connected (if you go with 192.168.1.0/29 subnet router to router, with 192.168.1.1/29 on the local router and 192.168.1.2/29 on the connected router as suggested, it will be fine). So in this case 192.168.1.8/29 to the subnet that your NAT would be sources fall.
Have a static route on the router connected (192.168.1.2) for the network 192.168.1.8/29 pointing 192.168.1.1,
IP route 192.168.1.8 255.255.255.248 192.168.1.1
If return packets will be correctly routed toward our local router.
If you have an interface on the connected rotuer which includes the NAT would be source address range, let's say 192.168.1.254/24, even if you do your packages reach somehow 192.168.2.0/24, the package return never goes to the local router (192.168.1.1) because the connected router sees it as a connected subnet, so it will only expire
I hope I understood your scenario. Pleae make changes and let me know how you went with it.
Also, please don't forget to rate this post so useful.
I use a router IOS as a VPN L2L device to connect my site to several different customer locations, some of them use the same internal IP addresses. These VPNS have been working well.
I recently added another client to this system and I am now having a problem with the new configuration. With this configuration, I have NAT my internal addresses. NAT works correctly, but it NAT my bad common NAT addresses and therefore do not generate the tunnel.
My internal IP 10.10.x.x
incorrect NAT pool 10.129.x.x
decent NAT pool 10.99.x.x
The problem is simple. You have almost an identical ACL for two guests. As the first NAT rule has been added previously, it comes into play. To resolve this issue, you must set explicit host/subnet destination match instead of 'none' keyword.
For example like this:
ip access-list extended ME-CRYPTO-ACL
permit ip 10.129.40.0 0.0.0.255 host 10.10.131.63
ip access-list extended ME-NAT-ACL
permit ip 10.10.10.0 0.0.0.255 host 10.10.131.63
ip access-list extended SA-CRYPTO-ACL
permit ip 10.96.21.0 0.0.0.255 host 10.99.2.95
ip access-list extended SA-NAT-ACL
permit ip 10.10.10.0 0.0.0.255 host 10.99.2.95
Another solution is more complex and harder to understand (and explain), you can use Virtual models with tunnel-protection for each customer, VRF and NAT for common services.
HTH. Please rate this post if this has been helpful. If it solves your problem, please mark this message as "right answer".
We have a partner that we set up a VPN L2L with. Their internal host IP infringes on our internal IP range. Unfortunately, they are not offer NAT on their side. Is it possible on the SAA to configure a NAT device for my internal hosts will say 126.96.36.199 and ASA changes the internal address of the remote end overlapping?
If this is the scenario
192.168.5.0 ASA1 <---> <-- internet="" --="">ASA2<-->-->
ASA1 (NAT will be applied)
ASA2 (without nat will be applied)
You want to do something like that on ASA1
Change your source host or network to be 192.168.7.0 when communicating with the remote network. Change the remote network to come as long as 192.168.8.0 coming to your network on the SAA.
ACL soccer match:!-match-list ACLaccess acl_match_VPN ip 192.168.7.0 allow 255.255.255.0 192.168.5.0 255.255.255.0
! - NAT ACL
vpn_nat 192.168.5.0 ip access list allow 255.255.255.0 192.168.8.0 255.255.255.0
! - Translations
public static 192.168.7.0 (exterior, Interior) 192.168.5.0 netmask 255.255.255.0 0 0
static (inside, outside) 192.168.8.0 public - access policy-nat list
Complete the VPN configuration using acl_match_VPN as the ACL match. Your inside host will have to use the 192.168.7.0 network when you talk to the remote end.
I hope this helps.-->--->
I have my vpn set up exactly as I need. Users can connect to the vpn and get an IP of 172.16.17.0/24. These users can access then machines hidden behind the asa on the private interface 172.16.16.1/24. Users on the 172.16.16.1 interface can also access any machine not on the private through the router using nat interface. What I can not understand how is allowing vpn also users to access any machine not on the private via NAT on the router interface. Help would be appreciated.
See the road from ciscoasa #.
Gateway of last resort is a.b.c.1 to network 0.0.0.0
C 172.16.16.0 255.255.254.0 is directly connected, igbprivate
S 172.16.17.20 255.255.255.255 [1/0] via a.b.c.189, igbpublic
C 255.255.252.0 a.b.c.0 is directly connected, igbpublic
C 192.168.1.0 255.255.255.0 is directly connected, management
S * 0.0.0.0 0.0.0.0 [1/0] via ak.b.c.124.1, igbpublic
access list 101 line 1 permit extended ip 172.16.16.0 255.255.255.0 172.16.17.0 255.255.255.0
in the running-config nat statements
interface of global (igbpublic) 1
NAT (igbprivate) 0-access list 101
NAT (igbprivate) 1 0.0.0.0 0.0.0.0
If your VPN users connect on the side of the SAA Public then I still think Hairpining is what you should look into. It is very similar to my problem in which I want to VPN users to access internet through VPN. Packets from the VPN users must enter the public interface and return directly. I hope I understand this.
Need help to find how to configure anyconnect VPN with VPN client using a NAT networking internal.
There are many items on the side - how to disable NAT for vpn pool.
I need to create the gateway VPN to the complex international lnetwork, vpnpool is out of range of regular subnet of that network, so it's going to be questions witout NAT routing.
I so need to vpn clients connected to
be PATed to . The problem is that there is also a dynamic to PAT rule for the ordinary acccess Iternet which translates as 'rules NAT asymmetry... "error.
Create two times different NAT rules and moving them on up/down makes no difference. There are also some hidden rules of vpn setup :-(that could not be seen.
V8.3 seems is destroying trust in Cisco firewall...
Something like this works for me.
192.168.0.0/24---routeur--172.16.0.0/24 ASA-= cloud = host. (the tunnel he get IP address of 'over' pool, which is also connected to the inside)
BSNs-ASA5520-10 (config) # clear xlate
INFO: 762 xlates deleted
BSNs-ASA5520-10 (config) # sh run nat
NAT (inside, outside) static all of a destination SHARED SHARED static
NAT source auto after (indoor, outdoor) dynamic one interface
BSNs-ASA5520-10 (config) # sh run object network
network of the LOCAL_NETWORK object
192.168.0.0 subnet 255.255.255.0
The SHARED object network
172.16.0.0 subnet 255.255.255.0
BSNs-ASA5520-10 (config) # sh run ip local pool
IP local pool ALL 10.0.0.100 - 10.0.0.200
local IP ON 172.16.0.100 pool - 172.16.0.155
BSNs-ASA5520-10 (config) # sh run tunne
BSNs-ASA5520-10 (config) # sh run tunnel-group
attributes global-tunnel-group DefaultWEBVPNGroup
address pool ON
If I get your drift... bypass inside and outside is not really necessary on Cisco equipment as it should work straight out of the box via the proxy arp, but I'm not face or solution providers for remote access.
I have the following problem and can't seem to find a solution.
I have 2 routers Cisco, A and B with a VPN connection. Two routers have a serial number
interface pointing outside and an ethernet interface (allows to call the A and B)
pointing to the inside.
Traffic between Subnet A and B is NOT coordinated and VPN works great.
Now router B has a second ethernet (C), subnet C interface.
I added this subnet to the IPSEC ACLS on both routers as I want to allow A subnet
access subnet C via the VPN.
The tunnel is running with no NAT is done.
However, the B, B and C subnet access router is using a NAT:
IP nat inside
The C interface
NAT outside IP
IP nat inside source overload map route NAT interface C
route NAT allowed 10 map
corresponds to the IP 123
access-list 123 allow ip SUBNET_B SUBNET_C
So far so good. Now the problem:
How can I NAT traffic from subnet to subnet A C?
I tried to add
access-list 123 allow ip SUBNET_A SUBNET_C
but it does not help that the outbound VPN seems to not be affected by the
NAT rule, probably because it is not considered as coming from an interface with ip nat «»
Is there a way to do this without using the tunnel interfaces?
Thanks in advance,
If I understand you correctly, you want traffic from subnet A reach router B, deciphering, NATted interface B and thten routed to interface C.
Please correct me if I'm wrong.
You can use ACB (routing based on the policy) for this.
Create an ACL to identify traffic:
access-list 101 permit ip subnet A subnet C
Create a loop:
Loopback int 1
IP 188.8.131.52 255.255.255.252
IP nat inside
Create a road map to route traffic after its decrypted.
pol_nat allowed 10 route map
corresponds to the IP 101
set ip next-hop 184.108.40.206
Apply the road map to your WAN interface:
int 0 series
IP policy route map pol_nat
In this way, traffic is first decrypted and is routed to the loopback, which has a 'ip nat inside' applied, then it will be routed to the subnet C after being natted with your NAT rule.
* Please rate if this can help.
I have an ASA 5505 can I VPN in, my problem is that I do not have access to my internal network. Right now, I have my cable modem enter my ASA and my ASA goes to my Cisco 3660 router. I think my problem is somewhere in the routing domain, but I don't really know what I'm doing... Help, please.
The ASA config:
: Saved : ASA Version 8.2(3) ! hostname ciscoasa domain-name wood.homeesrv.com enable password DQucN59Njn0OjpJL encrypted passwd 2KFQnbNIdI.2KYOU encrypted names dns-guard ! interface Ethernet0/0 switchport access vlan 2 ! interface Ethernet0/1 ! interface Ethernet0/2 ! interface Ethernet0/3 ! interface Ethernet0/4 ! interface Ethernet0/5 ! interface Ethernet0/6 ! interface Ethernet0/7 ! interface Vlan1 nameif inside security-level 100 ip address 192.168.2.1 255.255.255.0 ! interface Vlan2 nameif outside security-level 0 ip address dhcp ! ftp mode passive dns domain-lookup inside dns domain-lookup outside dns server-group DefaultDNS name-server 220.127.116.11 name-server 18.104.22.168 domain-name wood.homeesrv.com access-list inside_nat0_outbound extended permit ip 192.168.1.0 255.255.255.0 192.168.3.0 255.255.255.0 access-list VPNWoodHome_splitTunnelAcl standard permit 192.168.2.0 255.255.255.0 access-list WoodVPN_splitTunnelAcl standard permit 192.168.2.0 255.255.255.0 access-list Split_Tunnel_List standard permit 192.168.1.0 255.255.255.0 pager lines 24 logging enable logging asdm warnings mtu inside 1500 mtu outside 1500 ip local pool HomeVPN 192.168.3.0-192.168.3.10 mask 255.255.255.0 icmp unreachable rate-limit 1 burst-size 1 no asdm history enable arp timeout 14400 global (outside) 1 interface nat (inside) 0 access-list inside_nat0_outbound nat (inside) 1 0.0.0.0 0.0.0.0 route outside 0.0.0.0 0.0.0.0 22.214.171.124 1 route inside 192.168.1.0 255.255.255.0 192.168.2.2 1 timeout xlate 3:00:00 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 dynamic-access-policy-record DfltAccessPolicy aaa-server VPN protocol radius http server enable http 192.168.2.0 255.255.255.0 inside http 192.168.1.0 255.255.255.0 inside no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart crypto ipsec transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac crypto ipsec transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac crypto ipsec security-association lifetime seconds 28800 crypto ipsec security-association lifetime kilobytes 4608000 crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set pfs group1 crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set 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 dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set reverse-route crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP crypto map outside_map interface outside crypto map inside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP crypto isakmp enable inside crypto isakmp enable outside crypto isakmp policy 10 authentication pre-share encryption 3des hash sha group 2 lifetime 86400 client-update enable telnet timeout 5 ssh timeout 5 console timeout 0 management-access inside dhcpd dns 126.96.36.199 188.8.131.52 interface inside ! threat-detection basic-threat threat-detection statistics access-list no threat-detection statistics tcp-intercept webvpn enable inside enable outside group-policy WoodVPN internal group-policy WoodVPN attributes dns-server value 192.168.1.14 184.108.40.206 vpn-tunnel-protocol IPSec webvpn split-tunnel-policy tunnelspecified split-tunnel-network-list value WoodVPN_splitTunnelAcl default-domain value wood.homeserv.com username Jonathan password WsMCHUiqvEuA9Gmb encrypted privilege 15 tunnel-group WoodVPN type remote-access tunnel-group WoodVPN general-attributes address-pool HomeVPN default-group-policy WoodVPN tunnel-group WoodVPN ipsec-attributes pre-shared-key ***** ! 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 Cryptochecksum:20c3b97b24f2fadeb1154024bd995f03 : end no asdm history enable
Cisco 3660 Router Config:
Current configuration : 1096 bytes
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
no aaa new-model
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.1.1 192.168.1.19
ip dhcp pool 192.168.1.0/24
network 192.168.1.0 255.255.255.0
dns-server 220.127.116.11 18.104.22.168 192.168.1.14 192.168.1.13
username woodjl privilege 15 secret 5 $1$FJyW$Ozgsn9oO0acvYSSeohvzX/
ip address 192.168.2.2 255.255.255.0
ip nat outside
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip http server
ip http authentication local
no ip http secure-server
ip http timeout-policy idle 600 life 86400 requests 10000
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 192.168.2.1
line con 0
line aux 0
line vty 0 4
to do this: -.
attributes of Group Policy WoodVPN
no value in split-tunnel-network-list WoodVPN_splitTunnelACL
value of Split-tunnel-network-list Split_Tunnel_List
Add also: -.
access-list inside_nat0_outbound extended permit ip 192.168.3.0 255.255.255.0 192.168.1.0 255.255.255.0
Let me know if that helps.
I have a PIX 515E current of execution to 7.
Is it possible to use VPN with only 1 static IP address from the ISP (no gateway or the ip address of the ISP router is provided).
I can set up routing on the ADSL modem, but then the PIX does not have a valid Internet IP address?
I think that v7 does not support PPPOE? so I can't set the mode on the bridged adsl modem?
Is there a way to fix this?
Any help appreciated gratefully.
apply the commands below:
ISAKMP identity address
ISAKMP nat-traversal 20
If the problem persists, then please post the entire config with ip hidden public.
I have a site to site vpn between my main office and an office. Traffic between flow correctly with the exception of some protocols. My main router has static NAT configured for port 25 and a few others. For each of these protocols that have a static nat, I can't send the traffic from my office to the IP in the static nat
either I can't access port 25 on 172.16.1.1 of my office of the branch of the 172.17.1.1, but I have remote desktop access
It's like my list of NAT is excluding the static entries that follow. I have posted below the configs. Any help would be appreciated.
Main office: 2811
Two routers connected to the internet. VPN site to Site between them with the following config
crypto ISAKMP policy 1
isakmp encryption key * address *. ***. * *.116
Crypto ipsec transform-set esp-3des esp-md5-hmac VPN - TS
map VPN-map 10 ipsec-isakmp crypto
set peer *. ***. * *.116
game of transformation-VPN-TS
match address VPN-TRAFFIC
I have two IP addresses on the router principal.122 et.123
There is an installer from the list of the deny on the two routers - that's the main:
overload of IP nat inside source list 100 interface FastEthernet0/0
access-list 100 remark = [Service NAT] =-
access-list 100 deny ip 172.16.0.0 0.0.255.255 172.17.0.0 0.0.255.255
access-list 100 permit ip 172.16.0.0 0.0.255.255 everything
access-list 100 permit ip 172.24.0.0 0.0.255.255 everything
To serve clients vpn no internet, the following nat is configured to send e-mail to exchamge
IP nat inside source static tcp 172.16.1.1 25 *. ***. * expandable 25 *.122
Try to use the nat policy to exclude traffic from your servers to be natted when switching to the branch office network.
Sth like this
STATIC_NAT extended IP access list
deny ip 172.16.1.1 host 172.17.1.0 255.255.255.0 aka nat0 for traffic from the server
allow the ip 172.16.1.1 host a
policy-NAT route map
corresponds to the IP STATIC_NAT
IP nat inside source static tcp 172.16.1.1 25 *. ***. 25-card *.122 of extensible policy-NAT route
I received a request to provide a connectivity solution between our private server 10.102.x.y and a3rd advantage partner server. 10.247.x.y solution of VPN site to site. I want to hide our real IP of 10.102.x.y and replace 10.160.x.y (using Natting).
The configuration is the following:
3rd party partner server->
3rd party ASA FW-> Tunnel VPN IPSec Internet-> Our ASA FW-> Our server private 10.247.x.y
10.102.x.y private IP
My dogs entered so far (still awaiting 3rd party to set up their ASA)
name 10.160.x.y OurNat'dServer
crypto ISAKMP policy 6
Crypto ipsec transform-set 3rd Party esp-aes-256 esp-sha-hmac
3rd party ip host 10.160.x.y host 10.247.x.y allowed extended access list
tunnel-group 80.x.x.x type ipsec-l2l
80.x.x.x group of tunnel ipsec-attributes
pre-shared key xxxxxxxxx
football match 117 card crypto vpnmap address 3rd party
card crypto vpnmap 117 counterpart set 80.x.x.x
card crypto vpnmap 117 the transform-set 3rd Party value
public static 10.160.x.y (Interior, exterior) 10.102.x.y netmask 255.255.255.255
The config goes to meet my requirements and the solution envisaged, or is my inaccurate understanding?
Any help on this would be appreciated.
Thanks in advance,
Select this option.
Who will break actually internet traffic with this server because the external address that is sent over the internet is considered to be a 10.160.x.y. In the past, I did something like this:
public static 10.160.x.y (Interior, exterior), list-dest-3rdParty access policy
policy-dest-3rdParty of the ip host 10.102.x.y host 10.247.x.y allowed extended access list
Who will ONLY perform NAT traffic on this server if traffic is coming from the 10.247.x.y.
Hi people, I was hoping sopmeone on these forums might be able to help. I have some problem with a config for our ASA5510, functioning 8.2 (1)
I installed a VPN tunnel a firewall to vyatta off-site. The tunnel is up.
ABN-FW3-CISCO ASA5510 # show crypto ipsec his
Tag crypto map: VPN_Zettagrid_Map, seq num: 10, local addr: 116.212.X.X
VPN_cryptomap list access ip 22.214.171.124 255.255.0.0 allow 192.168.11.0 255.255.255.0
local ident (addr, mask, prot, port): (126.96.36.199/255.255.0.0/0/0)
Remote ident (addr, mask, prot, port): (192.168.11.0/255.255.255.0/0/0)
#pkts program: 14, #pkts encrypt: 14, #pkts digest: 14
#pkts decaps: 16, #pkts decrypt: 16, #pkts check: 16
compressed #pkts: 0, unzipped #pkts: 0
#pkts uncompressed: 14, comp #pkts failed: 0, #pkts Dang failed: 0
success #frag before: 0, failures before #frag: 0, #fragments created: 0
Sent #PMTUs: 0, #PMTUs rcvd: 0, reassembly: 20th century / of frgs #decapsulated: 0
#send errors: 0, #recv errors: 0
local crypto endpt. : 116.212.X.X, remote Start crypto. : 119.252.X.X
Path mtu 1500, fresh ipsec generals 58, media, mtu 1500
current outbound SPI: 670F3BF5
Now I can pass information of the 119.252.X.X to our internal networks (188.8.131.52/16) vyatta (yes I know this is a wide audience, but it comes to the environment, I inherited, I'm running with a project to put private network addresses, but its not finished quite yet)
The problem seems to be information of ASA to the internal network behind the vyatta - 192.168.11.0/24.
When I check my syslog I get the following error: (this example has been a connection attempt mstsc)
: Inbound TCP connection deny from 184.108.40.206/60660 to 192.168.11.101/3389 SYN flags on the interface inside
Now Im guessing this SYN message means that the ASA trying to NAT my outgoing packets... which is strange because I have configured a rule sheep. But when I do a show nat is the result:
ABN-FW3-CISCO ASA5510 # display nat inside
is the intellectual property inside 220.127.116.11 outside 192.168.11.0 255.255.0.0 255.255.255.0
Exempt from NAT
translate_hits = 0, untranslate_hits = 37 (this value does not change)
Here is my config for NAT
Inside_nat0_outbound to access extended list ip 18.104.22.168 255.255.0.0 allow 192.168.11.0 255.255.255.0
Inside_nat0_outbound to access ip 10.0.0.0 scope list allow 255.255.255.0 192.168.11.0 255.255.255.0
Access extensive list ip 22.214.171.124 Inside_nat0_outbound allow 255.255.255.0 192.168.11.0 255.255.255.0
(I have a separate ACL for interesting traffic)
VPN_cryptomap to access extended list ip 126.96.36.199 255.255.0.0 allow 192.168.11.0 255.255.255.0
VPN_cryptomap to access ip 10.0.0.0 scope list allow 255.0.0.0 192.168.11.0 255.255.255.0
Access extensive list ip 188.8.131.52 VPN_cryptomap allow 255.255.255.0 192.168.11.0 255.255.255.0
Global 1 interface (outside)
NAT (inside) 0-list of access Inside_nat0_outbound
NAT (inside) 1 0.0.0.0 0.0.0.0
NAT (dmz) 1 172.30.3.0 255.255.255.0
NAT (management) 1 184.108.40.206 255.255.255.0
NAT (dmz2) 1 172.30.2.0 255.255.255.0
static (inside, dmz) 220.127.116.11 18.104.22.168 255.255.0.0 subnet mask
Im guessing that one of these rules is in conflict? Does nat (inside) 0 Inside_nat0_outbound access list take precedence over the nat (inside) 1 0.0.0.0 0.0.0.0?
I can post more if necessary config, any help at this point would be much appreciated
Hmm looks like you establish 192.168.11.0 who seems to be blocked by the ACL on the traffic of 22.214.171.124 inside the interface.
Please paste config ACL or see if that blocks this traffic.
Just a mental block, I feel at the moment.
ASA 5585 code 9.0.x race - there is no NAT configuration at all on the box. This ASA firewall will end a site to site VPN. -
My question is - is a rule of "NAT exemption" required... .similar to the crypto ACL for the traffic in the tunnel... .or is NAT exemption required only when NAT is configured.
My apologies if this is a silly question
When there is no NAT config, the ASA will pass all traffic not translated, which includes the traffic tunnel. If you're right, you don't need any NAT exemption.
However, you can configure it. For example, if you plan to add NAT at a later stage, then it might be easier to implement than NAT if your NAT exemption is already in place.
A partner of business (BP) has the following requirements. I don't know which statements of config I need to use to ensure this successful connection
Business (BP) needs partner complete the VPN tunnel on a firewall that is behind another firewall running NAT
(BP) will create UDP 500 and UDP 4500 endpoints on the NAT firewall which is forwarded to the Firewall VPN termination.
Because of this, the (BP) needs of my dissertation support encapsulation of ESP over UDP (NAT - T)
My series of ASA5500 using the code (825) has the statements
Crypto isakmp nat-traversal 21
crypto ISAKMP ipsec-over-tcp port 10000
VPN # match address BP_VPN crypto card
VPN # set peer (peer_ip) crypto card
VPN # game of transformation-AES_256_SHA crypto card
IPSec-l2l type tunnel-group (peer_ip)
IPSec-attributes of tunnel-group (peer_ip)
pre-shared key (TBD)
BP_VPN list extended access permit tcp host 10.x.x.x, 172.16.x.x eq (specified port) host
BP_VPN list extended access permit tcp host 10.x.x.y host 172.16.x.x eq (specified port)
NatExempt_VPN list extended access permit tcp host 10.x.x.x, 172.16.x.x eq (specified port) host
NatExempt_VPN list extended access permit tcp host 10.x.x.y host 172.16.x.x eq (specified port)
Please indicate whether these statements are sufficient and if not what else would be needed.
You need not order
crypto isakmp ipsec-over-tcp port 10000It is for the exclusive implementation that was used before NAT - T is available. You only need to nat-traversal active. For your ACL, using ports in there makes everything complicated. You should see if you can just use 'ip' here. If there is already configured on your ASA virtual private networks, then the config is probably ok. If this isn't the case, you must always configure ISAKMP and activate the encryption on the interface card.
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