how to lock down sendmail?

[golfcart]

I've got a fresh install of RedHat 9 and need to run sendmail for this computer only. How do I set it up so it only accepts outgoing mail from localhost or from domains that I choose? Thanks

[krohnjw]

You could use hosts.allow, and then use an implicit deny in hosts.deny.

If you just want local connections then you can just block the port using iptables, then no incoming connection could ever be made.

[golfcart]

If you just want local connections then you can just block the port using iptables, then no incoming connection could ever be made.

I would like to do this. Can you give me some quick instructions on how to do it correctly. Thanks alot

[krohnjw]

Redhat 9 should have a fancy little wizard to set that up for you Will be in the Kmenu or whatever the hell you call that foot, under system if i remember correctly. Just tell it the ports you want open, it will block everything else by default.

If that isnt working for you let me know and I can paste you an iptables script that will just block everything, and open up a few ports for you if you want.

[Siliconjunkie]

I believe that what you want is how it comes out of the box.

[golfcart]

Thanks krohnjw, I unchecked everything. I will be opening http and ssh but not until I get all of the patches in place