[ILUG] dead pings

[Gleth Silverlight]

>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 ?

There's a nice article about *stealth*ing your box on rootprompt.org:

http://www.rootprompt.org/article.php?article=922

Have Fun,
Jim.