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Problem with nat session between remote users and site behind a ipsec tunnel.

Hi all,

I would like to know what is necessary in my cisco ios easy vpn  configuration in order to allow remote users access to more than one  server on site B. I set up the Easy VPN configuration with the DVTI,but i have the issue that :  Remote users can initiate just one IP session with hosts of site B (just  one nat translation is available).

Trafic from site A to site B  has to be natted on an IP address in order to be allowed by site B  router.I set up the router in site A as describe below:

ip nat pool REMOTO_SERVI netmask

ip nat inside source route-map REMOTO_SERVI pool REMOTO_SERVI overload

access-list 105 permit ip

access-list 105 permit ip host

route-map REMOTO_SERVI permit 10

match ip address 105

Is this possible ?

This is the topology scheme:


Can anyone help me ?

Thanks in advance,


Re: Problem with nat session between remote users and site behin

I see an issue with the statement below

access-list 105 permit ip host

I understand that you want all your user traffic from site A should go PAT (or NAT overload) to over the ipsec tunnel to access servers on Site B ( If this is correct, then do following config.

config t

no access-list 105 permit ip host

Create a new access rule, lets say 106 (considering there is no access rule106, if yes, you can use any other name of acl rule below)

access-list 106 permit ip host

Now, call access-list 106 under crypto configuration to match the vpn traffic. The router on site B should have a reverse of acl 106 for VPN.


Please do rate all helpful posts

Mohit Paul CCIE-Security 35496 P.S Please do rate this post if you find it helpful to make it easier for others seeking answers to similar queries
New Member

Re: Problem with nat session between remote users and site behin

Hi Mopaul,

thanks for your quick reply ....

The problem that i am facing is located in the translation from the remote users of site A to site B.

I already stablished an ipsec tunnel between site A and site B and it is working fine (lan of site A: - LAN of site B: Traffic from site A to site B is natted overload in ip address in order to be accepted from site B.

Site A router is also an easy vpn server for remote users. These remote users ( have to do the same process of site A lan users in order to connect to site B servers (remote users have to be natted overload in ip address to access site B), here is where i have the problem. Sometimes i can stablished two different session from remote users to two servers of site B , but the majority of the time (99% of the time) I can only stablished one session, the other one throws an error.

if i look at the sh ip nat statistics :

pool REMOTO: netmask

        start end

        type generic, total addresses 1, allocated 1 (100%), misses 132

I don´t really know what is going on with the configuration.

Is it more clear now ?