X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-0.4 required=5.0 tests=AWL,BAYES_20,RCVD_NUMERIC_HELO,SPF_HELO_PASS,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org To: cygwin@cygwin.com From: Oleksandr Gavenko Subject: Can not make port forwarding from Cygwin when ControlMaster/ControlPath used. Date: Mon, 13 Feb 2012 11:18:07 +0200 Lines: 41 Message-ID: <84r4xzw0q8.fsf@bifit.com.ua> Mime-Version: 1.0 Content-Type: text/plain User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.91 (windows-nt) X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com I can forward port from Cygwin to Debian: cygwin# nc -l -p 6000 debian1# ssh -L 7000:cygwin.host:6000 user@cygwin.host debian2# telnet localhost 7000 But if do same in inverse direction I got: debian# nc -l -p 6000 cygwin1# ssh -L 8000:debian.host:6000 user@debian.host bind: Address already in use channel_setup_fwd_listener: cannot listen to port: 8000 Could not request local forwarding. I don't understand what this mean... netstat under Cygwin is Windows utility: debian# netstat -l -n | grep 6000 tcp 0 0 0.0.0.0:6000 0.0.0.0:* LISTEN cygwin2# netstat -n -a -n TCP 127.0.0.1:8000 0.0.0.0:0 LISTENING 2308 [ssh.exe] Note that ssh.exe is not "ssh -L" but that I run to connect to debian.host for "nc -l -p 6000". To resolve issue I comment this line in ~/.ssh/config: # ControlPath ~/.ssh/sock_%r@%h_%p # ControlMaster auto -- Best regards! -- 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