Re: block pings

[Danny Pansters <danny@ricin.com>]

On Tue, 29 Aug 2000, Nick wrote:
> how do you stop linux from replying to pings like
>
> microsoft does.  you can't ping www.microsoft.com or www.msn.com
>
> thankx nick

OK, I got curious since it involves icmp, so it's not done in 
/etc/inetd.conf, and I didn't know how to do it. 
All I can say is RTFM, it's right there in the icpm man page that 
I tried first.

Just put this in /etc/sysctl.conf to turn ping replies off:

net/ipv4/icmp_echo_ignore_all=1

Then run

# sysctl -p

But after that you should really go back to /etc/sysctl.conf and get rid of 
it again (hint: it involves running sysctrl again :-).

What the hell,

-- 
Danny Pansters
danny@ricin.com