From owner-freebsd-questions Mon Jun 15 16:30:02 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA19217 for freebsd-questions-outgoing; Mon, 15 Jun 1998 16:30:02 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from scifair.acadiau.ca (scifair.acadiau.ca [131.162.160.32]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA19106 for ; Mon, 15 Jun 1998 16:29:18 -0700 (PDT) (envelope-from miker@scifair.acadiau.ca) Received: from localhost (miker@localhost) by scifair.acadiau.ca (8.8.5/8.8.5) with SMTP id UAA10148; Mon, 15 Jun 1998 20:29:01 -0300 (ADT) Date: Mon, 15 Jun 1998 20:29:01 -0300 (ADT) From: Michael Richards To: Christoph Kukulies cc: questions@FreeBSD.ORG Subject: Re: using tcpdump effectively In-Reply-To: <199806151447.QAA29137@gilberto.physik.RWTH-Aachen.DE> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Mon, 15 Jun 1998, Christoph Kukulies wrote: > What sporadically happens is that a X session to our Mentor Design Architect > running on HP is ceased and the connection breaks (we login via rlogin > and start the X client with DISPLAY set to the FreeBSD machine.) Es mag dich nicht! > When the connection breaks we see something like 'no route to host' This looks like it could be a routing problem. The X protocol has a number of well known security problems. Personally I would suggest that you use secure shell to forward the X11 connections. I believe you can download the unix verion from www.datafellows.com. > Could that be caused by denial of service attacks? What exactly is a denial > of service attack? Rather than try to break into a system, the person simply tries to break the system so as to be a pain in the butt to the "real" users. -Mike To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message