Hello.

Does anyone know what port the PING command utilises? I have iptables running to block everything except for what is specified. It's all working fine however for the life of me I can't find anywhere what port PING uses?

Thanks alot to anyone that can lend a hand

Regards
Craig

Correct me if i'm wrong but i believe pings use the protocol icmp so ports don't apply to pings.

Oh ok. Thanks for your reply.

So would you know what I would need to allow to make my machine (that is firewalled) reply to ping requests?

At the moment I've basically done this...

iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j ACCEPT
iptables -A INPUT -p tcp -m multiport --dport 135,136,137,138,139,445 -j ACCEPT
iptables -A INPUT -p udp -m multiport --dport 135,136,137,138,139,445 -j ACCEPT

In the end this blocks everything, but allows port 22 (ssh), and 133-139 & 445 for samba.

However it still doesn't reply to ping

Anyone?

Thanks
Craig

Hi all.

Figured it out. This works a treat...

iptables -A INPUT -p icmp -j ACCEPT

Thanks
Craig

I could be wrong but the port that is used is port 8
At least for tcp/udp