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Re: [FW-1] weird email attachment problem!!



> I have a simple scenario where two subnets are connected through fw-1(4.1
> sp5 on IP440 3.4.1).
>
> 192.168.2.0/24 and 192.168.3.0/24 are connected on the same interface of the
> firewall with 192.168.2.1 and 192.168.3.1 as their default gateways on the
> firewall(multiple addresses in the interface of the firewall)respectively.
>
> the mail servers are located on 192.168.3.0/24 subnet.
>
> from last couple of days, any mails with attachments originating from .2
> subnet is either very very slow or times out.
>
> they can receive just fine but cannot send.
>
> both these subnets are natted to same legal ip. i do have nat rules to not
> nat any traffic between the two subnets. i.e.,
>
> subnet .2  --> subnet .3 any orig orig  orig
> and vice versa.
>
> subnet 3 is working perfectly fine.
Usually slow mail problems are a result of identd timeouts. One of the
first rules in your rulesbase should be:
any any ident REJECT

The reject is critical. A drop will cause timeout problems.

If this does not fix your problem, then the next choice is DNS problems.
Make sure your systems are using the right DNS servers and that those
servers are up and operational.

-Don

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