Date:	Tue, 23 Feb 1999 08:43:24 -0000
From:	John Conover <conover@INOW.COM>
Subject:      Denial of service process table attacks
To:	BUGTRAQ@NETSPACE.ORG

The DNS process table attacks are mentioned at:

    http://lwn.net/daily/ptable.html

I have been using tcpserver as a replacement for inetd for many
months. It is at:

    ftp://koobera.math.uic.edu/www/ucspi-tcp.html

and allows limiting the *_number_* of concurrent processes forked out
of the inet facilities, as opposed to the *_rate_* of forked
processes.

Also, optionally, allows logging by port, with access control via a
fast database, by IP, and user.

I'm currently using it on httpd, ftp, faxd, smtp, telnet, pop3, and
the qmail daemons. Seems viable.

FWIW, FYI ...

	John

--

John Conover, 631 Lamont Ct., Campbell, CA., 95008, USA.
VOX 408.370.2688, FAX 408.379.9602
conover@inow.com, http://www2.inow.com/~conover/john.html