From owner-freebsd-questions@FreeBSD.ORG Thu Oct 12 07:30:18 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 020B016A4E2; Thu, 12 Oct 2006 07:30:17 +0000 (UTC) (envelope-from sales@webignite.net) Received: from ylpvm43.prodigy.net (ylpvm43-ext.prodigy.net [207.115.57.74]) by mx1.FreeBSD.org (Postfix) with ESMTP id F3D3D43D60; Thu, 12 Oct 2006 07:30:13 +0000 (GMT) (envelope-from sales@webignite.net) X-ORBL: [69.225.194.103] Received: from ChrisLaptop (adsl-69-225-194-103.dsl.scrm01.pacbell.net [69.225.194.103]) by ylpvm43.prodigy.net (8.13.8 out.dk.spool/8.13.8) with ESMTP id k9C7U6Bh009100; Thu, 12 Oct 2006 03:30:11 -0400 From: "Chris - WEBignite" To: , Date: Thu, 12 Oct 2006 00:30:08 -0700 Message-ID: <008f01c6edd0$3f520c40$0200a8c0@ChrisLaptop> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 thread-index: Acbtf/jzDlq2RovxQI+5V8quzlmGfwAMDFFwAAfgJdA= In-Reply-To: <000101c6edb0$30dacaf0$0400a8c0@maf> Cc: Subject: RE: Problems with ipfw and ssh X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Oct 2006 07:30:18 -0000 I've actually just started seeing this same error. I do have a rule set for local 127.0.0.1 and an allow for layer2 traffic. Oct 11 23:59:02 firewall sshd[49200]: fatal: Write failed: Permission denied I get this error when updating my firewall rules via ssh. Any current ssh connections are dropped, but I'm able to reinitiate a new connection without trouble. -Chris -----Original Message----- From: owner-freebsd-ipfw@freebsd.org [mailto:owner-freebsd-ipfw@freebsd.org] On Behalf Of Mark Jose Sent: Wednesday, October 11, 2006 8:41 PM To: 'Spiros Papadopoulos'; freebsd-questions@freebsd.org; freebsd-ipfw@freebsd.org Subject: RE: Problems with ipfw and ssh Hi, Just a suggestion/query: Do you have you localhost/127.0.0.1 rules defined to allow all traffic? Cheers -----Original Message----- From: owner-freebsd-ipfw@freebsd.org [mailto:owner-freebsd-ipfw@freebsd.org] On Behalf Of Spiros Papadopoulos Sent: Thursday, 12 October 2006 7:53 AM To: freebsd-questions@freebsd.org; freebsd-ipfw@freebsd.org Subject: Problems with ipfw and ssh Hi, I am trying to configure a firewall using ipfw for a machine running FreeBSD 5.4. Without NAT. I am nearly a newbie on this (since i never had time until now..) but still i believe i understand exactly the concepts and what needs to be done. Except the manual page and chapter 26.1 in the handbook I am using good references such as: http://www.freebsd-howto.com/HOWTO/Ipfw-HOWTO I need to connect remotely to the machine using ssh and this is where i get the problem: Initially i can connect properly using a normal user account. When later i am trying to su to root it does nothing and the connection closes. I have ipfw enabled in the kernel to deny everything by default. I have used both (one at a time) the following rules concerning ssh, in /etc/ipfw.rules and also other combinations, such as taking off setup and keep-state etc etc which would then make my firewall stateless as far as i understood, which is something i don't want anyway. ${addcmd} 300 allow log logamount 5 tcp from any to me 22 setup keep-state - ${addcmd} 300 allow log logamount 5 tcp from any to any ssh keep-state In a first investigation (not thorough) i found this post: http://www.freebsdforums.org/forums/showthread.php?t=21876 where from, i cannot realize what is wrong or how to fix this. I run the sshd in debug mode and below is the portion, for when i am trying to su to root /* sshd -d */ Write failed: Permission denied debug1: do_cleanup debug1: PAM: cleanup debug1: do_cleanup debug1: PAM: cleanup debug1: session_pty_cleanup: session 0 release /dev/ttyp7 And here are related logs: /* line from /var/log/messages */ Oct 11 20:25:54 username sshd[26251]: fatal: Write failed: Permission denied /* /var/log/auth.log */ Sep 26 11:17:34 username sshd[50073]: Connection from xxx.xxx.xxx.xx port 1545 Sep 26 11:17:46 username sshd[50073]: Accepted keyboard-interactive/pam for user from xxx.xxx.xxx.xx port 1545 ssh2 Sep 26 10:17:49 username su: user to root on /dev/ttyp4 Sep 26 11:17:51 username sshd[50068]: Read error from remote host xxx.xxx.xxx.xx: Connection reset by peer Sep 26 13:29:40 username sshd[50076]: Read error from remote host xxx.xxx.xxx.xx: Operation timed out Is it trying to write to a socket? I cannot see what is trying to do and the permission is denied (of course maybe it is in front of me..but..) Could anyone please advice? Thanks in advance Spiros _______________________________________________ freebsd-ipfw@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw To unsubscribe, send any mail to "freebsd-ipfw-unsubscribe@freebsd.org" _______________________________________________ freebsd-ipfw@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw To unsubscribe, send any mail to "freebsd-ipfw-unsubscribe@freebsd.org"