HTTPS inpect on Cisco 837 router

[ddantoni]

Hi,

I have a Cisco 837 router with IOS v12.3T(11).

I can't establish connection to https server as WindowsUpdate for exemple (When I check updates, an error appear). I think that the problem is on inspect rules because the problem not appear on my bank https site.

I have try to set inspect rule on eth0 and Dialer0 interface but the problem persist.

If there is some optimization or security improve to do on my config, it involve me.

My running-config is in attachment.

Thanks lot of.

PS : Excuse me for my bad english, I am French.

[nkhawaja]

if you remove inspection rules, then it works?

[ddantoni]

No,

If I remove inspect rules, I have no access to internet (no dns, no www, ...).

I tried to add an access-list permit any any on eth0 interface (out) and dialer0 (out) but i had always no internet.

[ddantoni]

I have found the problem.

The problem was MTU on dialer0

I have changed ip mtu 1452 to 1492 and it's ok.

bye