IPTABLES blocking imcp and telnet HELP!!

fooforon · 04-06-2004, 12:13 AM

Hi,

I have been reading up on IPTABLES and Im still quite confused, I working on this personal project just for fun and got stuck.

I have three machins

win2k(192.168.0.3)<-->(192.168.0.1)redhat8.0(150.149.0.1)<-->win2ksrv (150.149.0.2)

the redhat machine is acting as a router and I would like to stop icmp packets and telnet port 23

This is where im stuck at

iptables -A INPUT -m tcp ..... something about port 23
iptables -A INPUT -m icmp ..... icmp

any help would be greatly appericated

Jamie

win32sux · 04-06-2004, 12:22 AM

iptables -A INPUT -p TCP -s 0/0 --destination-port 23 -j DROP

iptables -A INPUT -p ICMP -s 0/0 --icmp-type 8 -j DROP

fooforon · 04-06-2004, 06:07 AM

Thank you

bentman78 · 04-06-2004, 02:35 PM

you can block and enitire port range too. That is better than trying to acutally set up rules to block each and every porotocol.