Securing Postfix.
Patrick
pert at tas-kc.com
Fri Dec 12 22:29:52 CST 2003
It is pretty secure by default. Check to see if you have added any
domains/IP networks as local.
Check any changes you have made to the main.cf also check to see if you
are calling anything from another file that may have a command secretly
snuck in them.
in particular mydomain/mydestination these should not affect relaying
since it thinks it is these domains.
but then you have a section called Trust & Relay Control make sure you
don't trust outside machines/nets.
Perhaps you have a hacked box or weak POP before SMTP/SMTP auth setup.
I suggest using the ISP's mail server for sending mail if you have
remote users. Then you can control your local net. Check the logs
perhaps you have a hijacked PC inside your network
ismgr wrote:
> Can anyone give me some pointers/feedback on the best way to do this?
>
> I have this box (Yellow Dog 3.0) setup and it is relaying mail
> outside, but I want to make sure that this is kept secure.
>
> I've read through docs before on the main.cf file, and I think that I
> have it configured right, but wanted to make sure that I'm not leaving
> anything open from the outside.
>
> Thanks!
>
> Chris
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