Problem with nat table 1721?

[tonycowling]

I have a 1721 router on cable modem on e0, vpn connection to two remote sites. Cable on e0 is dhcp makes this a little more complex.

My problem is with connecting to an offsite email server from the lan behind the cisco 1721.

Over a period of time approx 24 hrs we end up with outlook errors connecting to the email server.

Cannot connect or something simular.

The problem has been improved upon slightly by

ip nat translation finrst-timeout 120

If you clear the nat table the problem is fixed instantly for another period of time only to re-imerge the next day.

May be I have some kind of loop happening?

Any suggestions would be greatly appreciated.

[Georg Pauwen]

Hello,

what is the lease time given to your Ethernet0 lease ? Are you using static inside NAT entries for your mail server ? If so, you might want to consider adding the ´extendable´ option to the translation statemnent(s) for your mail server.

Can you post the configuration of your router(s) ?

Regards,

GP

[tonycowling]

The lease time on outside e0 is actually 12 months.

How can I show you my config securely?