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Re: ICMP - Today India, Samoa, and Iran are in the tank - back to orginal thread DDoS, or No DDoS?
From: vigilaro () gmx net
Date: Mon, 18 Oct 2004 14:38:15 -0400

Today Iran (Terhan), India (Bangalore) and Samoa are dragging
the Asian index down. how you determine if its' DoS on these routers, or not? Is there a Public Darknet Monitoring Site out there tracking backscatter, or other such focused traffic?

Andreas-


Cedric Blancher wrote:

Le lun 18/10/2004 à 17:12, james edwards a écrit :
I don't see the reason why it would cause a problem, as firewall is able
to spot ICMP related to server's IP connections as well...
New connections to the server must be implecitally allowed, as there
is no established state to refer to.

I guess that if you want to run a server behind a firewall, then you
have to allow some TCP or UDP connections to it... And you only have to
deal ICMP stuff for thoses connections, as others are prohibited, and
the firewall does this.

I really don't see where the problem is.

My point is just to show that we do have now solutions to filter ICMP in
a smart way that won't break PMTU discovery and stuff that rely on ICMP
messages reception...


PS : I think we could end this offline, we're far away from original
topic :)



--
pub  1024D/553A49A5 2004/09/22 vigilaro (der wachter) <vigilaro () gmx net>
    Key fingerprint = DD07 4DC8 C434 8FD3 C0F3  5A6C 2376 B26C 553A 49A5
sig  553A49A5 vigilaro (der wachter) <vigilaro () gmx net>

allgemeiner Schlüssel vorhanden
http://math-www.uni-paderborn.de/pgp/

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