Cisco 2801 with dual T1s

[OroITDirector]

We have just installed a Cisco 2801 with dual T1s for our data connection. It then runs to a Sonicwall TZ170 and then to the network switch. We have an internal mail server with a public address of 64.##.##.## that NATs internally on the Cisco router to a 10.0.1.##. Every so often, the NAT translation will change from the actual 10.0.1.## number to another random internal IP causing to look like the mail server is offline to outside users. Is this a router issue? I didn't write the config as it is managed by ATT. Anyone ever see this?

 

[OroITDirector]

Added note..., a reboot of the router fixes the issues until the NAT translation changes again. I can't see any time patterns either.

 

[ISPKing]

Well for it to be natting to a private address, i am assuming the sonicwall is in Transparent mode> and the router is doing overload as well? anyway the main thing is to make sure that nothing else is being leased that natted private through dhcp.

CCNP

 

[burtsbees]

The firewall doesn't have to do anything.

internet--2800--firewall--LAN

the nw from the 2800 to the firewall is I assume in a private range. The LAN is a totally different address range, assuming 10.0.1.x, correct?

/

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!