[ale] ICMP Echo Disable
Danny Cox
danny at compgen.com
Wed Oct 4 12:36:42 EDT 2000
All,
I recently wrote:
Stephen,
On Wed, 4 Oct 2000, Stephen Pellicer wrote:
> > On Wed, Oct 04, 2000 at 10:47:52AM -0400, frost33 at mindspring.com wrote:
> > > Is there a way to turn off ping capabilities on the fly? In other
> words,
> if you were getting flooded by pings, is there any way to stop the attack
> without killing your connection?
>
> There is another way, on-the-fly. You can turn off all icmp echo
> replies by saying:
>
> echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all
>
> or broadcast response by:
>
> echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
>
> as root.
>
> See ...src/linux/Documentation/proc.txt for further info.
Well, I got it backwards (Doh!). Make both of those 'echo 1'
instead of 'echo 0'.
Danny
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