Ping flooding (fwd)

Michael Dillon michael at
Mon Jul 8 23:24:02 UTC 1996

Are there any procedures in place to track down this kind of network
abuse. In particular, is it possible that it is a stealth attack?
Before you answer, take note that this is going to appear in Bob
Metcalfe's column next week.

---------- Forwarded message ----------
Date: Mon, 8 Jul 1996 15:30:43 -0600 (MDT)
From: Kevin Rosenberg <kevin at>
Reply-To: inet-access at
To: inet-access at
Subject: Re: Ping flooding
Resent-Date: Mon, 8 Jul 1996 15:30:53 -0600 (MDT)
Resent-From: inet-access at

> Some months later we had an incident of massive amounts of forged email
> from a site called SUNSETDIRECT.COM.  For several weeks they sent forged

We are currently undergoing a ping flood attack, though our upstream
provider has filtered icmp from the host so the flood is no longer
affecting our T1 line.

The system administrator of the site that appears to be flooding us
doesn't believe his site is the source of the attack. He states that he
can't see the icmp packets, though I don't know how he is sniffing his

My questions are these: 

Is it possible for someone to forged the source IP address of an icmp

If so, do they have to be in some routing proximity, or can they forge the
source address while they are connected from anywhere in the world?


Kevin Rosenberg             | CyberPort Station
Chief System Administrator  | The Finest Internet Service Possible!
kevin at         |
          Finger kevin at for PGP Public Key

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