[ILUG] dead pings

[Vincent Cunniffe]

Deim Agoston wrote:
> 
> Hello !
> 
> A friend of mine asked me to scan a host whether he can ssh into the host
> or not (he got a login but the admin said that he provides only https).
> When I tried to nmap the machine to discover is it true or not I got no
> responses. I know /proc/sys/net/ipv4/icmp_echo_ignore_all directive and
> setting it 1 turns off all the messages but when I tried to use the -P0
> option I got no responses too. How can he achieve this ? Some kind of
> tricky ipchain rules ?

You can configure any firewall, including ipchains, to either accept a
connection, explicitly refuse it, or just eat the packets silently.

Vin