From owner-freebsd-security Thu Jun 14 12: 6:24 2001 Delivered-To: freebsd-security@freebsd.org Received: from mail.webmonster.de (datasink.webmonster.de [194.162.162.209]) by hub.freebsd.org (Postfix) with SMTP id 44CAC37B405 for ; Thu, 14 Jun 2001 12:06:17 -0700 (PDT) (envelope-from karsten@rohrbach.de) Received: (qmail 51954 invoked by uid 1000); 14 Jun 2001 19:06:38 -0000 Date: Thu, 14 Jun 2001 21:06:38 +0200 From: "Karsten W. Rohrbach" To: Crist Clark Cc: Marcel Dijk , Evren Yurtesen , "Antoine Beaupre (LMC)" , "Thomas T. Veldhouse" , Jason DiCioccio , freebsd-security@FreeBSD.ORG Subject: Re: IPFW almost works now. Message-ID: <20010614210638.F49807@mail.webmonster.de> Mail-Followup-To: "Karsten W. Rohrbach" , Crist Clark , Marcel Dijk , Evren Yurtesen , "Antoine Beaupre (LMC)" , "Thomas T. Veldhouse" , Jason DiCioccio , freebsd-security@FreeBSD.ORG References: <3B2698EF.BD7EF0DB@globalstar.com> <02a201c0f415$4dad56b0$0900a8c0@windows> <3B27D344.82AEDED0@globalstar.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-md5; protocol="application/pgp-signature"; boundary="9/eUdp+dLtKXvemk" Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <3B27D344.82AEDED0@globalstar.com>; from crist.clark@globalstar.com on Wed, Jun 13, 2001 at 01:55:32PM -0700 X-Arbitrary-Number-Of-The-Day: 42 X-URL: http://www.webmonster.de/ X-Disclaimer: My opinions do not necessarily represent those of my employer Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org --9/eUdp+dLtKXvemk Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Crist Clark(crist.clark@globalstar.com)@2001.06.13 13:55:32 +0000: > Marcel Dijk wrote: > >=20 > > > To the original poster, also keep in mind that firewalls at the other > > > end of your connection could be making trouble for you too. You can u= se > > > tcpdump(8) and firewall logging to see if traffic is getting to your > > > FTP server at all. > > > -- > > > Crist J. Clark Network Security Engine= er > > > crist.clark@globalstar.com Globalstar, L.P. > > > (408) 933-4387 FAX: (408) 933-4926 > >=20 > > Traffic IS getting to the FTP server, because I can login. The thing is= when > > I have logged in and the client sends the LIST command it can't read the > > directory and closes the connection. As discribed here: > >=20 > > _______________________________________ > > Can't build data connection: interrupted system call. > > ABOR command succesfull. > > Connection Lost > > _______________________________________ > >=20 > > So, connection TO the server seems to work but when the server tries to= SEND > > traffic to the client it fails. >=20 > I realize that you are having no problem with your _control_ connection, > your data connection is failing. I was interested in tcpdump(8) to make > sure that the incoming data connection was actually making it to your > server, or just to see what the heck was up with the data connection. ipfilter's protocol dependend stateful filtering could do serous magic here... /k --=20 > "I didn't change a thing and from the moment I didn't change it, > it didn't work anymore." --Anonymous KR433/KR11-RIPE -- WebMonster Community Founder -- nGENn GmbH Senior Techie http://www.webmonster.de/ -- ftp://ftp.webmonster.de/ -- http://www.ngenn.n= et/ karsten&rohrbach.de -- alpha&ngenn.net -- alpha&scene.org -- catch@spam.de GnuPG 0x2964BF46 2001-03-15 42F9 9FFF 50D4 2F38 DBEE DF22 3340 4F4E 2964 B= F46 --9/eUdp+dLtKXvemk Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE7KQs+M0BPTilkv0YRAneHAJ4k/bNTCXHPvXP4ey4bQCaLCd03CACgnor6 RD0MY/J/jIREuShWVr9QSSk= =iReI -----END PGP SIGNATURE----- --9/eUdp+dLtKXvemk-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message