Re: Can I change ssh port forwardings on a active connection *non-interactively* ?
On Sun (18/11/12), Darren Tucker wrote: On Fri, Nov 16, 2012 at 12:10:19AM +0200, Manolis Tzanidakis wrote: Hello all, I want to send the '~C' escape to ssh followed by ie. '-L 1024:localhost:1024' from the active ssh connection's shell, non-interactively from a script. Is it possible? Or is there a better way to accomplish this? If you start ssh with ControlMaster mode enabled you can use ssh -O forward to add forwardings to an established connection, eg: $ ssh -o ControlMaster=yes -o ControlPath=/tmp/ctl localhost $ ssh -o ControlMaster=no -o ControlPath=/tmp/ctl -O forward \ -L 1234:127.0.0.1:22 localhost I've tested some options (including ControlMaster) with one of the will-be users of this system and I think I should abandon this plan altogether and give me them pre-defined ssh_configs and putty confs instead. Anyway, thanks for your time Darren and Alexander. -- Manolis Tzanidakis http://mtzanidakis.com/ mtzanidakis[at]gmail[dot]com
Re: Can I change ssh port forwardings on a active connection *non-interactively* ?
On Fri, Nov 16, 2012 at 12:10:19AM +0200, Manolis Tzanidakis wrote: Hello all, I want to send the '~C' escape to ssh followed by ie. '-L 1024:localhost:1024' from the active ssh connection's shell, non-interactively from a script. Is it possible? Or is there a better way to accomplish this? If you start ssh with ControlMaster mode enabled you can use ssh -O forward to add forwardings to an established connection, eg: $ ssh -o ControlMaster=yes -o ControlPath=/tmp/ctl localhost $ ssh -o ControlMaster=no -o ControlPath=/tmp/ctl -O forward \ -L 1234:127.0.0.1:22 localhost -- Darren Tucker (dtucker at zip.com.au) GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4 37C9 C982 80C7 8FF4 FA69 Good judgement comes with experience. Unfortunately, the experience usually comes from bad judgement.
Re: Can I change ssh port forwardings on a active connection *non-interactively* ?
On Thu (15/11/12), Alexander Hall wrote: On 11/15/12 23:10, Manolis Tzanidakis wrote: Hello all, I want to send the '~C' escape to ssh followed by ie. '-L 1024:localhost:1024' from the active ssh connection's shell, non-interactively from a script. Is it possible? Or is there a better way to accomplish this? Without judging the reason, `ssh -t` might be a good start. Hey there, thanks for answering. Could you be more specific pls? I'm not sure how this could help. All users will have regular logins (pseudo-ttys) and can send escape sequences to ssh. I'm trying to build an idiot-proof menu for non tech savvy users to allow them create a couple of tunnels to local services (on different ports), on demand. The script needs to run a bunch of other stuff after adding the tunnels, so I can't just tell them to pass '-L etc.' to the client.. Let me rephrase this to avoid further misunderstandings. I've got this scenario (anything prior to '$' is the hostname): userbox$ ssh u...@foo.bar foo.bar$ printf %s@%s\n `whoami` `hostname` u...@foo.bar Let's say the user wants to add a tunnel to her current ssh connection for accessing httpd running on server foo.bar. The httpd listens on localhost only. I want to automate this process: foo.bar$ ~C ssh -L 2000:localhost:80 Forwarding port. -- Manolis Tzanidakis http://mtzanidakis.com/ mtzanidakis[at]gmail[dot]com
Can I change ssh port forwardings on a active connection *non-interactively* ?
Hello all, I want to send the '~C' escape to ssh followed by ie. '-L 1024:localhost:1024' from the active ssh connection's shell, non-interactively from a script. Is it possible? Or is there a better way to accomplish this? I'm trying to build an idiot-proof menu for non tech savvy users to allow them create a couple of tunnels to local services (on different ports), on demand. The script needs to run a bunch of other stuff after adding the tunnels, so I can't just tell them to pass '-L etc.' to the client.. -- Manolis Tzanidakis http://mtzanidakis.com/ mtzanidakis[at]gmail[dot]com
Re: Can I change ssh port forwardings on a active connection *non-interactively* ?
On 11/15/12 23:10, Manolis Tzanidakis wrote: Hello all, I want to send the '~C' escape to ssh followed by ie. '-L 1024:localhost:1024' from the active ssh connection's shell, non-interactively from a script. Is it possible? Or is there a better way to accomplish this? Without judging the reason, `ssh -t` might be a good start. /Alexander I'm trying to build an idiot-proof menu for non tech savvy users to allow them create a couple of tunnels to local services (on different ports), on demand. The script needs to run a bunch of other stuff after adding the tunnels, so I can't just tell them to pass '-L etc.' to the client..
