Filtering ICMP (Was Re: SMURF amplifier block list)

Eric Germann ekgermann at
Tue Apr 21 21:31:41 UTC 1998

At 08:45 PM 4/21/98 +0400, Alex P. Rudnev wrote:
>1) Traceroute is not affected by this filter;

Just a note that if you are using Winders, tracert does use ICMP Echo
Requests, no high port numbers.  FYI.

>2) ICMP is really blocked at many different places of Internet; we answer 
>every day _no matter you can't ping, it's becuase they refuse 
>PING's to their network_. 

Still don't make it right.

Eric Germann				Computer and Communications Technologies
ekgermann at			Van Wert, OH 45891
					Phone:	419 968 2640			Fax:	419 968 2641

Network Design, Connectivity & System Integration Services 
A Microsoft Solution Provider					

More information about the NANOG mailing list