How can block my SMTP Traffic?

krishnakishore · 06-18-2004, 02:12 PM

Hi
I have a linux box with RH 9.0 and it is havinf two ethernets, eth0, eth1, where as eth 0 is connected to internet and eth1 is connected to my local lan.

I want to block the SMTP traffic from my Local LAN to internet at my Linux box. What Changes i have to made to my firewall file.

Please Help me out......

advance thanx,,

myguest · 06-19-2004, 02:56 AM

if you have a firewall you can add a rule to drop all SMTP traffic

maxut · 06-19-2004, 04:02 AM

iptables -A FORWARD -i eth1 -p tcp --dport 25 -j DROP

or

iptables -A FORWARD -i eth1 -p tcp --dport 25 -j REJECT

ppuru · 06-19-2004, 07:49 AM

You can also use /etc/hosts.deny

smtp: <network address>

For example

smtp: 192.168.100.