blocking squirrelmail

KenHam · 03-28-2005, 01:35 PM

I'd like to block some computers on local network to access the webmail (squirrelmail). I'd tried to use the follow command but it's not working. Can anybody help me please?

Example:

iptables -A INPUT -p tcp -s 192.168.0.3 --dport 143 -j DROP

thanks!
Ken

david_ross · 03-28-2005, 01:39 PM

If they are using squirrelmail then it runs over http - the standard port being 80.

KenHam · 03-28-2005, 01:53 PM

Thanks for the answer but I read that squirrelmail uses port 143. Besides when I used iptables to block the port 143, i could block the squirrelmail for all users:

iptables -A INPUT -p tcp --dport 143 -j DROP

Why I can't put a specific IP to block access into this command? Do you have any other options?

Ken

david_ross · 03-28-2005, 01:57 PM

Port 143 is the port used for IMAP. The web server communicates with the imap server. The user never connects directly to the imap server when using a web based email client.

KenHam · 03-28-2005, 03:00 PM

Many thanks!