X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:date:from:to:subject:message-id:mime-version :content-type; q=dns; s=default; b=sOGe2umXJU6ZImT64Sw9cv2hqZ96G Deuiyp4WcoMYY2ttnVZXF+k8Ud19BLU9eVTInOMpwBN8ApTNaV3sH4yWcJ3MC21H NL+XEF7y5vIYzgF+aEx5s56ZyK3day8yZWkjFwVl0vaGdwlrgJjpOuLl/+/I9vwK INietCfBBozZZQ= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:date:from:to:subject:message-id:mime-version :content-type; s=default; bh=zxn2l7XCTtETDro2X10KQoc/LfM=; b=uyK uQkTIP3mTKxHVvHfJ6AqERq7fAzx/3GmbDzsDoH/x8ZVDH1poyFQi2AsP4u0hi1N 96WLsLtTmRngLJvD/dr3sxnjYKfSdGQK5S+6ifjugTHlGwGi/iUYu6+KUDvK0dvy bIfFmy6lmyoEZsxmsXG6YJlaWfp3lu1DHK1oRL2E= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com X-Spam-SWARE-Status: No, score=0.7 required=5.0 tests=AWL,BAYES_40,RDNS_NONE,SPF_HELO_PASS,SPF_PASS autolearn=no version=3.3.1 Date: Mon, 15 Jul 2013 14:16:00 -0500 (CDT) From: "L. V. Lammert" To: Cygwin Mailing List Subject: Problem binding OpenSSH_6.2p2 to IPV4 stack Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-SPAM-Info: Omnitec Corporation MailScanner X-SPAM-MailScanner: Found to be clean After troubleshooting an AutoSSH problem last week, it appears that on this 2003R2 box sshd cannot bind to the IPV4 stack! Rather, with the default configuration it binds to IPV6 (and supports a loopback connection fine), but a remote connection fails. When sshd is forced to bind IPV4 ("Addressfamily inet"), sshd cannot start. With default sshd config, connection to the autossh tunnel from a remote system produces: [remote system] ssh_exchange_identification: Connection closed by remote host [2003R2 server] debug1: channel 2: connection failed: Connection refused connect_to 127.0.0.1 port 2206: failed. debug1: channel 2: free: ::1, nchannels 3 Any pointers on troubleshooting would be greatly appreciated, .. TIA! Lee -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple