smtp slow w/ ipchains

[mvvilleza]

Hi all,

I have a RHL 6.2 box. I enabled ipchains w/ the ff rules:

ipchains -A input -i eth0 -p tcp --dport 25 -j ACCEPT
ipchains -A output -i eth0 -p tcp --sport 25 -j ACCEPT

When i do a telnet on port 25 on the linux box, the smtp connection is significantly slow. But after removing the ipchains rules, telnet to port 25 is fast. What other ports do i need to open to improve smtp connection?

 

[mvvilleza]

Don't bother, found solution already...

Another question, if my linux is configured to use DHCP, how will i know the dns address assigned to it?

 

[lgarner]

cat /etc/resolv.conf is one way

 

[RhythmAce]

ifconfig would be another