HSRP NAT & Servers

[chillbob2008]

Hi,

I have two 1760 routers, one with a ethernet cable WAN link and the other with a DSL link. Both routers are runing NAT, HSRP is tracking the next hop gateway's and is all working fine.....

But I want to run a mail server behind the routers I have forwarded port 25 to hit the servers internal IP on both the routers but heres the problem - say the link on router 1 went down router 2 would take over. Presuming the MX records are setup correctly mail would start coming in on router 2. However when the WAN link on router 1 comes back up it will take over as the primary router but the link on router 2 is still up and able to accept connections inbound but the server will send data back via the active primary router (router 1) which will have a different source addresss (after NAT ext.) so the sending device wont recognise the replys.

Any one know a way around this, or would it be ok just to rely on the MX records to onceagain detect that the lowest numbered route is back up - I'm not sure how long this process takes?

Thanks

p.s. both connections are from different ISP's

 

[burtsbees]

You can NAT to a loopback, so that the translations will remain. This is how I have done it with HSRP and NAT. I am not sure this would help, but it is a thought...

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!