Date: Thu, 26 Jul 2001 02:24:06 -0700 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: "Kris Kennaway" <kris@obsecurity.org>, "Shawn Ramsey" <shawn@megadeth.org> Cc: <questions@FreeBSD.ORG> Subject: RE: telnetd problem? Message-ID: <00b401c115b4$b78dbaa0$1401a8c0@tedm.placo.com> In-Reply-To: <20010726004017.A42068@xor.obsecurity.org>
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That's a bandaid. He stated that the problem wasn't happening until he updated to the new code, so obviously a patch they put into the telnetd broke something. In any case this posting is completely inappropriate on this list - he should be subscribed to -stable if he's running stable and he should be submitting these kinds of things there. Please don't clutter the general -questions list with problems with beta versions of FreeBSD!! Ted Mittelstaedt tedm@toybox.placo.com Author of: The FreeBSD Corporate Networker's Guide Book website: http://www.freebsd-corp-net-guide.com >-----Original Message----- >From: owner-freebsd-questions@FreeBSD.ORG >[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Kris Kennaway >Sent: Thursday, July 26, 2001 12:40 AM >To: Shawn Ramsey >Cc: questions@FreeBSD.ORG >Subject: Re: telnetd problem? > > >On Thu, Jul 26, 2001 at 12:14:43AM -0700, Shawn Ramsey wrote: >> We seem to be getting some port 23 IRC probes or something. This is causing >> a bunch of telnetd daemons to start, and they never die. So the number of >> telnetd daemons grow until running on of ptys. Short of blocking telnetd >> access, is there anything than can be done about this? There are dozens of >> telnetd daemons open, and no active port 23 traffic. Why won't they die? > >There's an exploit which involves sending 16MB of data to the telnetd >server. People are probably doing that and it's (predictably) taking >a long time to complete. Restrict connections to telnetd or use >inetd's rate/child-limiting facilities. > >Kris > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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