NAT groups

Hi all

We use the ip-sec to a pix520, internal Terminal Server version 6.3.3 for our mobile access on a server. I ve set up a command nat as "nat (inside) 0 access-list xyz".

It s works very well.

Now, I have to create access for external counsel with ip - sec to a server especially in our local network. I try of creates another command nat 0 with another access list but it s overwrites the first command of nat 0. What can I do?

Where is my mistake?

When I see the configuration examples, I see that I must not using "nat" but how can we separate the access?

Thx for the help.

Helmut

Hi Helmut,

You can associate to an access list when you use NAT exemption.

Therefore, the workaround you can use is to merge the two into a single access lists and associate this list unique access to the command "nat (inside) 0 access-list"...

Hope that helps... PLS, don't forget to rate messages.

Paresh

Tags: Cisco Security

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    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

  • NAT for DVR Config question

    Hai all,

    New to Cisco IAM, I have a Cisco 2811 router with 2 ethernet ports:

    Here is my config:

    2-port ethernet on my router

    1 port 0/0 directly connected to the ISP link

    WAN IP is configured as 122.183.1xx.6 ip and the gateway is 122.183.1xx.5

    1 port 0/1 connected to my local network which is 192.168.1.0 network

    LAN Port 0/1 IP's 192.168.1.200

    Internet works fine

    -----------------------------------------------------------------------------------------------------------

    If I do one that is my IP address?

    I get the IP as 122.183.1xx.42

    My ISP says its a Pool of LAN IP:

    122.183.1xx.43 - 47

    ----------------------------------------------------------------------------------------------------------

    Now I just discovered my DVR outside of my internet network?

    Do I need a NAT to view my DVR?

    If I use an ID DYDNS my 2811 router filters the 37777.how port of release

    DVR IP is 192.168.1.242 port is no 37777

    What is the procedure for nat to a static pool of ip from my ISP? How to unblock port 37777?

    Help to sort it out...

    Thank you...

    have you tried the previous suggestion? I asked for but I don't see everything.

    To check if your ISP blocks or do not do the following:

    1. create an ACL as follows

    access-list 199 permit tcp any newspaper EQ 37777 122.183.1xx.43 host

    access ip-list 199 permit a whole

    2. apply to the external interface

    Router (config) # int fa0/1

    (config-if) #ip group-access 199 in

    3. now Telnet 37777 outdoor port 122.183.1xx.43

    4. check if the th packages hit you box by running the following command:

    See the list of 199 ip access

    If you see numbers of access increases on the front-line ACL meanas your ISP does not block the traffic.

    After doing this. Please send the latest config.

  • NAT outside source to a server internal

    I worked on it for months and I'm still not able to get this working properly. What I want to accomplish is to allow Usablenet to connect to our staging web server from the internet with a range of IPs for Usablenet.

    The strange thing is that this seems not correct

    network web_staging_net object

    NAT (web_staging, outside) dynamic interface

    NAT (web_staging, outside) source static obj - static destination obj - 209.x.x.97 Useablenet Useablenet 10.x.x.197!

    ACL

    outside_in list extended access permitted tcp object-group Useablenet host 10.x.x.197 eq www

    Any help will be greatly appreciated.

    What is the configuration of the web_staging_net object? What is a subnet or a single host?

    I recommend the creation of a host entry for 10.x.x.197 and remove static NAT entry of the other object.

    Something like this:

    network web_10.x.x.197 object

    Home 10.x.x.197

    NAT (web_staging, outside) static obj - 209.x.x.97

  • ASA 5510, 8.4 (4) totally confused 1 NAT

    I'll try to keep this simple. I spent about 18 hours of research, research and experiences and it is an honest figure, I kept track of my time so far.
    I need to run a home server on our network inside, but have the outside be able to reach it through the protocols and specific ports 3.
    I had HOPED to use objects and groups of y to achieve and do not have to redefine this server or 3 times the host and execute instructions from NAT 3 or more like this losses completely the concept and purpose of things, isn't? But the NAT statement seems to refuse to deal with the GROUPS. I can put a single SERVICE or a single port in the NAT, but I can't get a single NAT line under a single object - this server to several ports which are not a range.

    Here the need - I'll set every thing first to hold simple and straight (at least in my head):
    Interface that must face or sits on the dirty Internet is named "WAN" (why I don't know, but it is and it is too complex to change it now)
    The WAN, the external interface has an IP address of 1.1.1.66
    Our supplier has given us 16 public guests or we can use the addresses.
    (1.1.1.67 is on the ASA failover for the same interface).
    My server inside LAN is 10.10.10.70
    I need to use ANOTHER address I need to keep it out of 1.1.1.66 and 1.1.1.67 on the WAN 5510 interface pair.

    I want to use a specific 1.1.1.68 to outside Internet address to access the server sitting on 10.10.10.70 inside.
    BUT, I want access to UDP 500 and UDP 4500, ESP only, nothing else.

    The idea is this - something outdoors, which means on the Internet, need my server inside, so hit the WAN interface this IP 1.1.1.68 port UDP 500 or 4500 or ESP for join my server on the LAN inside.
    The ASA has noticed the UDP 500 traffic, 4500 and ESP to 1.1.1.68 and it translates the SAME ports on 10.10.10.70.
    So I need a NAT device that will tell hit 1.1.1.68 UDP 500 or UDP 4500 or ESP traffic should be sent to 10.10.10.70 UDP 500, or UDP 4500 or ESP.

    The server must meet the back course!
    If very simple, he did all the time. "port forwarding" and a static NAT - this server always would be 1.1.1.68 If you were to research outside and he also always came out under this address. but inside we know it as 10.10.10.70

    I can't seem to get the SENATE to take if I use a single service or define a single service, but when I create a service group that has ESP, UDP 4500 and UDP 500 in it, it does not recognize any group - he pours out if I say any word except the NAT statement SERVICE.

    It is in a way I tried, but then 8.3 and later do not seem to like it and the term "origin" is killing me and I cannot find mention anywhere.

    Object service VPN-4500
    service destination udp 4500 eq
    Object service VPN - 500
    udp destination eq isakmp service

    service object-group mygroup
    purpose purpose of service VPN-4500
    purpose purpose of service VPN-500

    (I also now ESP in there but it is of no consequence that it won't work even with just these two)

    network servernetworkobject object
    Home 10.10.10.70
    My server description
    vpn-out network object
    Home 1.1.1.68
    Second description IP address to use when the view from my server

    NAT (inside, WAN) source static servernetworkobject WANsecondIP service mygroup mygroup

    where servernetworkobject is the name I've defined for the network object in the ASA and WANsecondIP is the address that I want to use defined as a network and mygroup object is the group, I created which contains the 3 services or ports.
    These aren't real names or addresses is not really that lame in the configuration, I just cleaned it for public use

    All of THE examples that I find on the web, including Cisco sites, are very similar to this, but then I also see, it must be defined with the object network itself and which is different from that of the samples on Cisco websites! I'm SO confused... Object should simplify this in spades, instead it is making it much more difficult and make configuration a lot bigger and clumsier.

    The best way to do this is:

    1. define the static nat rule

    2. Add an access-list (or access list entry in the existing WAN_in (or what you call)) to allow the service group.

    So you should have:

    network servernetworkobject object
    Home 10.10.10.70
    My server description
    vpn-out network object
    Home 1.1.1.68
    Second description IP address to use when the view from my server

    NAT (inside, WAN) source static vpn-out servernetworkobject

    .. .and

    WAN_in list extended access allowed object-group mygroup any object servernetworkobject

  • ASA 8.4. (1) Nat ignored rules

    Hi all!

    I'm having some problems with NAT, the packet does not match the nat rule (which I believe it should be) and is not choose the right output interface. So card crypto never started

    This is the relevant config:

    Interface Port - channel2.4

    Description Public TESA ADSL internet connection

    VLAN 7

    nameif PublicTESA

    security-level 5

    address IP PUBLIC_IP1 255.255.255.128

    Interface Port - channel2.1

    BT internet connection, used for (VPN) platforms description

    VLAN 4

    nameif PublicBT

    security-level 5

    address IP PUBLIC_IP2 255.255.255.252

    Interface Port - channel1.1

    Description user VLAN

    VLAN 100

    nameif users

    security-level 70

    IP 172.16.30.10 255.255.255.0

    network of the net users object

    172.16.30.0 subnet 255.255.255.0

    NET description users

    object EXTERNAL_COMPANY_NAME-remote control-net-1 network

    Home 172.21.250.206

    Tunel l2l net remote 1 description

    object EXTERNAL_COMPANY_NAME-remote control-net-2 network

    172.21.248.0 subnet 255.255.255.0

    Tunel l2l description remote control 2 net

    object-group network EXTERNAL_COMPANY_NAME-Local-networking-group

    LANs Description L2L EXTERNAL_COMPANY_NAME

    users-net network object

    object-group network EXTERNAL_COMPANY_NAME-remote control-nets-group

    remote networks Description L2L EXTERNAL_COMPANY_NAME

    network-object POLCIA-remote control-net-1

    network-object POLICIA-remote control-net-2

    destination of EXTERNAL_COMPANY_NAME-Local-networks-EXTERNAL_COMPANY_NAME Local-networking-group static NAT (PublicBT everything) static source EXTERNAL_COMPANY_NAME-remote control-nets-group EXTERNAL_COMPANY_NAME-remote control-nets-group

    NAT (all, PublicTESA) dynamic source any description of the Nat interface to the internet at the PublicTESA interface

    RESULT:

    If I send a package from User Interface using 172.16.30.41 to 172.21.250.206, he was sent to PubicTESA do NAT with

    PUBLIC_IP1

    I recommend that you open a TAC case, then it can get properly studied.

  • 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.

  • Issue of NAT...

    Hi Experts,

    Quick question, if I want to do NAT exception for ALL ip traffic on an interface in version 8.4 (2). What should I do?

    I just want to check it again... would it work or do I have to use another method: nat (interface, all) static source a whole

    Thank you

    Soroush.

    Hello

    I guess you already asked something like that on the previous thread.

    If you situation is still for no. HOSTS must be translated through the firewall then you can simply configurations to LET OUT all THE NAT.

    Usually when people need hosts exempted from NAT they don't usually have some networks of destination for which it should apply. (VPN connections). If you set parameters of destination for the NAT configuration also.

    You might naturally public subnets behind the firewall without NAT. As long as no other NAT rule fits these public subnets as a source, you can simply leave out all the NAT configuration.

    What I tested I would probably the NAT configuration above although I mentioned in the other thread. It might even cause problems.

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    object-group network NETWORKS

    network-object

    network-object

    NAT (interface, no) static source of NETWORKS

    Pretty hard to say more than once is not an accurate picture of the situation.

    -Jouni

  • DynDNS and NAT

    Hello

    Being new in the Cisco field, the notement in CLI, I have two small problem that may be related.

    The LUN DDNS update is not done and not of the NAT doesn't work, someone could maybe help me

    Here is the config of the CISCO881-K9

    !
    !
    !
    !
    IP dhcp dns update both
    no ip bootp Server
    no ip domain search
    IP domain name dyndns.org
    8.8.8.8 IP name-server
    IP ddns update dyndns method
    DDNS
    !
    IP ddns update method wellmess6780_dyndns
    HTTP
    Add http://MyLogin: [email protected] / * //nic/updatesystem=dyndns&hostnam e =& myip =
    remove     http://MyLogin: [email protected] / * //nic/updatesystem=dyndns&host name =& myip =
    maximum interval 0 0 30 0
    minimum interval 0 0 30 0
    !
    DHCP-client update dns server IP times
    IP cef
    No ipv6 cef
    !
    !
    license udi pid CISCO881-K9 sn FCZ164091N8
    !
    !
    username privilege 15 secret 4 thierry hxs3I1G5/VfWpIztplmqsbnfWy7MCP3fSM9VloHus 9 q
    !
    !
    !
    !
    !
    !
    !
    !
    !
    !
    !
    !
    !
    !
    interface FastEthernet0
    LAN description
    no ip address
    !
    interface FastEthernet1
    LAN description
    no ip address
    !
    interface FastEthernet2
    LAN description
    no ip address
    !
    interface FastEthernet3
    LAN description
    no ip address
    !
    interface FastEthernet4
    no ip address
    no ip redirection
    no ip unreachable
    no ip proxy-arp
    automatic duplex
    automatic speed
    PPPoE enable global group
    PPPoE-client dial-pool-number 1
    !
    interface Vlan1
    Description $FW_INSIDE$
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    no ip unreachable
    no ip proxy-arp
    IP nat inside
    IP virtual-reassembly in
    IP tcp adjust-mss 1452
    !
    interface Dialer1
    IP ddns update hostname wellmess6780.dyndns.org
    IP ddns update wellmess6780_dyndns
    the negotiated IP address
    no ip redirection
    no ip unreachable
    no ip proxy-arp
    IP mtu 1492
    NAT outside IP
    IP virtual-reassembly in
    encapsulation ppp
    Dialer pool 1
    Dialer idle-timeout 0
    persistent Dialer
    PPP authentication chap callin pap
    PPP chap hostname     [email protected] / * /
    PPP chap password 7 01125F575611505C38
    PPP ipcp dns request
    No cdp enable
    !
    default IP gateway - 192.168.16.254
    IP forward-Protocol ND
    no ip address of the http server
    IP 8088 http port
    23 class IP http access
    local IP http authentication
    IP http secure server
    IP http timeout policy slowed down 60 life 86400 request 10000
    !
    IP nat inside source static tcp 192.168.16.99 80 80 Dialer1 interface
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    IP route 0.0.0.0 0.0.0.0 FastEthernet4
    IP route 0.0.0.0 0.0.0.0 Dialer1
    !
    access-list 100 permit ip 192.168.16.0 0.0.0.255 any
    access ip-list 100 permit a whole
    not run cdp
    !
    !
    !
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    local connection
    line to 0
    line vty 0 4
    access-class 23 in
    privilege level 15
    local connection
    transport input telnet ssh
    !
    !
    end

    Hello

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    no access ip-list 100 permit a whole

    Kind regards.

    Alain

    Remember messages useful rate.

  • NAT on SAA

    Hello world

    I want to know if any subnet is not directly configured on SAA on any interface. This subnet is from another router by VLAN routing. Can I configure NAT on SAA for this subnet?

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    interface Ethernet0/0
    switchport access vlan 2
    !
    interface Ethernet0/1

    switchport access vlan 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 0
    IP 200.150.75.2 255.255.255.252
    !
    interface Vlan2
    nameif outside
    security-level 100
    the IP 10.0.0.2 255.255.255.252
    !
    SW0 - ASA object network
    subnet 10.0.0.0 255.255.255.252
    network of the object VLAN10
    192.168.10.0 subnet 255.255.255.0
    network of the VLAN20 object
    subnet 192.168.20.0 255.255.255.0
    !
    Route outside 0.0.0.0 0.0.0.0 200.150.75.1 1
    Route inside 192.168.10.0 255.255.255.0 10.0.0.1 1
    !
    LAN extended permitted tcp an entire access list
    list of permitted udp extended LAN access a whole
    access allowed extended LAN icmp a whole list
    !
    !
    LAN access group in the interface inside
    SW0 - ASA object network
    NAT dynamic interface (indoor, outdoor)
    network of the object VLAN10
    NAT dynamic interface (indoor, outdoor)

    network of the VLAN20 object
    NAT dynamic interface (indoor, outdoor)
    !
    !
    !
    !

    -------------

    Note: 192.168.10.0 and 192.168.20.0 subnet is not directly configured on ASA and I want to configure NAT for this subnet also but does not work.

    Kind regards

    Deepak Kumar

    www.deepuverma.in

    I agree that Karsten has a much better solution. But I thought that the solution with by subnet nat rule should work and I was wondering why it did not work. Looking a little closer, I noticed that the vlan 1 security level 0 and public IP is appointed on the inside while vlan 2 with security level 100 and the private IP address is appointed to the outside. This delay prevents either working solution.

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    Rick

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