closing port 25

[3inetworks]

Customer just doesn't want his staff to connect to server at port 25. So, we will need to block port 25 from his staff. I can keep Postfix use port 25, but is there any restriction from Postfix can be done, to prevent his staff to connect to server at port 25?

Thanks.

[irfan]

I think you can add a rule in your firewall to block incoming connections on port 25 from their (client's) network.

[lmthong]

Originally Posted by irfan

I think you can add a rule in your firewall to block incoming connections on port 25 from their (client's) network.

Today i used firewall to lock port 25 on LAN network to my MTA server. No one can use webmail! I did not try with WAN bound (because my MTA need to talk to other MTA). Any idea about this? What does zimbra-webmail use port 25 for?

[phoenix]

Originally Posted by lmthong

Today i used firewall to lock port 25 on LAN network to my MTA server. No one can use webmail! I did not try with WAN bound (because my MTA need to talk to other MTA). Any idea about this? What does zimbra-webmail use port 25 for?

Don't add your posts to old threads especially when your question has nothing to do with the original thread.

Port 25 isn't used by the Web UI, port 25 is used by MTAs to communicate with each other and transfer mail.