Zimbra Security what ports MUST I have open?

[Linuxwho?]

Hi All,

I want to thank you for your responses on my trouble threads. Now..if I am only opening smtp port 25 on my firewall from outside..and 443..is there any other ports I need open on the linux server? Or can I close them all down but those two? .. (and 7071). Thanks guys.

I am fairly new at linux so I am wondering CAN anyone still hack you with only 443 and 25 open? What are the vulnerabilities possible. Thank you.

[Krishopper]

Have a look at Firewall_Configuration

[Dirk]

You only need 25 and 443 open to the outside world. 25 to recieve mail and 443 to get the webmail console.