Re: What ports shoud be opened for mail server?

From: Yuan Liu (yliu@stemnet.nf.ca.remove_this)
Date: 07/06/02 

From: Yuan Liu <yliu@stemnet.nf.ca.remove_this>
Date: Sat, 06 Jul 2002 19:28:25 GMT

Jason wrote:

> Hi,
>
> I am wondering what ports should be opend in the firewall box if my mail
> server is in the dmz.
> Any help will be appreciated.
>
> Jason

What is a mail server in your context? If it only provides SMTP
(sendmail) to the Internet, only 25 needs be open. If it provides other
protocols like POP-3 (110) and IMAP (143) to the INTERNET, then you have
to open appropriate ports. Depending on your configuration, you may
also need to open SSL (443), and so on.

Yuan Liu

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