My First Denial of Service Attack..... (fwd)

Sun Oct 6 23:22:55 UTC 1996

---------- Forwarded message ----------
Date: Sun, 6 Oct 1996 11:40:25 -0400
From: Dave Van Allen <dave at fast.net>
Reply-To: inet-access at earth.com
To: "'inet-access at earth.com'" <inet-access at earth.com>
Subject: RE: My First Denial of Service Attack.....
Resent-Date: Sun, 6 Oct 1996 09:38:04 -0600 (MDT)
Resent-From: inet-access at earth.com

FYI, (if it has already been mentioned, please excuse the double post,
but:)

The latest version of the SYN attack code published in Phrack (last
weeks edition, NOT last months) has an imbedded 'ping' ever several
hundred SYN packets.

If you get attacked, run snoop, tcpdump or anything that captures
packets, and look for the pings - they have the real source address of
the sender of the SYN flood attack.

Please note, obviously the code can be modified to NOT ping, but our
attacker last night did not do that, and we had the name of the user,
their ISP, and other info in less than 15 minutes.

Best regards,
-
Dave Van Allen - You Tools Corporation/FASTNET(tm) 
dave at fast.net  (610)954-5910 http://www.fast.net 
FASTNET - PA/NJ/DE Business Internet Solutions 

>----------
>From: 	Avi Freedman[SMTP:freedman at netaxs.com]
>Sent: 	Saturday, October 05, 1996 7:37 PM
>To: 	inet-access at earth.com
>Subject: 	Re: My First Denial of Service Attack.....
>
>> I have a question about this -
>> 
>> Could place an incoming ping filter denying all on your router, AND turn 
>> off small servers on the router? Would this work? Is there a downside to 
>> this?
>> 
>> -Elroy ( elroy at mail.kcstar.com )
>
>Not to state the obvious, but if you turn off pings into your network
>then noone can ping into your network (for diagnostics etc...)
>
>Turning off small-servers on the router only affects things to the
>router (and not ICMP pings, just presumably udp pings).
>
>Avi
>
>
>============================== ISP Mailing List
>==============================
>Email ``unsubscribe'' to inet-access-request at earth.com to be removed.
>Email ``subscribe'' to inet-access-request at earth.com to join the list.
>

============================== ISP Mailing List ==============================
Email ``unsubscribe'' to inet-access-request at earth.com to be removed.
Excellent day for putting Slinkies on an escalator.