Re: Re[2]: "portscans" (was Re: Arbor Networks DoS defense product)

[E.B. Dreger]

AL> Date: Sat, 18 May 2002 21:50:34 -0400
AL> From: Allan Liska


AL> [allan@ns1 phpdig]$ telnet www.istop.com 80
AL> Trying 216.187.106.194...
AL> Connected to dci.doncaster.on.ca (216.187.106.194).
AL> Escape character is '^]'.
AL> HEAD / HTTP/1.0

Or

	lynx http://www.istop.com/

and press the '=' key for similar info.  Or echo the HEAD request
to a program that opens a TCP socket.  Or go to www.netcraft.com.

Of course, firewalls munching on TCP/IP can screw up IP stack
fingerprinting, causing nmap et al. to report "IIS on <favorite
*ix flavor>" when it really means "IIS on ??? behind firewall
running <favorite *ix flavor>".

I wonder how many people enjoy recompiling their *ix httpd to
report itself as IIS?  Watch for requests matching certain IDS
strings... what was that again about mad fast honeypots? ;-)


--
Eddy

Brotsman & Dreger, Inc. - EverQuick Internet Division
Phone: +1 (316) 794-8922 Wichita/(Inter)national
Phone: +1 (785) 865-5885 Lawrence

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