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IPTables Newbie

Well, the first thing, you dont need -p UDP (not ucp) since smtp is only transfered over tcp.  Do you have any other rules?  iptables -n -L and send the output the list.


On Mon, Nov 24, 2003 at 02:14:38PM -0600, Michael White wrote:
> Hello All,
> I'm new to LUG's, so I haven't had time to search the archives for this or a similar question.  Please bear w/ me if I'm repeating a recently answered question as I'm in need of a quick resolution.
> I'm building an RH9 firewall/mailserver combo box for a small client.  Sendmail appears to be running correctly in that I'm able to telnet to port 25 from an internal system.  However, after performing the following commands, I'm unable to telnet to the same port from and external IP:
> IPTABLES -A INPUT -p tcp --dport 25 -j ACCEPT
> IPTABLES -A INPUT -p ucp --dport 25 -j ACCEPT
> Am I going about this all wrong?  Should I be entering the command differently?
> Because this client is basically has no budget, running the firewall and the mailserver on the same box is my only option.  Any suggestions for resolving this problem are greatly appreciated?
> TIA,
> Michael White
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