An SSH tunnel provides an encrypted channel based on the SSH protocol.

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ssh: remote port forwarding failed for listen port <privileged>, although root

ssh root@host -R 135:other:135 Warning: remote port forwarding failed for listen port 135 Why? I'm root, nobody's listening on that port, subsequent -L 135:... works: ssh root@host -R ...
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3answers
181 views

Copying a file using SSH over a tunnel with cert forwarding

I need to find a way to copy files from mymachine to a server priv-server sitting on a private NATted network via a server pub-server with a public IP. The behind-NAT machine priv-server only has ...
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2answers
170 views

run a local SOCKS proxy tunneled through SSH

I was going through this post and couldn't quiet follow what is being implied there. A great "feature" I use every day at work: The ability to have SSH listen on port 443 so I can create a ...
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1answer
258 views

SSH over corkscrew and proxy get “ssh_exchange_identification” error

until few days ago I was able to connect to my remote ssh server, using corkscrew to tunnel the connection through the corporate proxy, with this simple configuration: ssh -v root@xxx.xxx.xxx.xxx -p ...
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1answer
521 views

Run SSH SOCKS5 proxy on system startup

I want to setup a linux server (Ubuntu Server 14.04 in this case) to be used as a SOCKS5 proxy by software on another client. Now this is pretty easy by running ssh -f -N -D 0.0.0.0:1080 localhost as ...
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2answers
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Determine dynamically allocated port for OpenSSH RemoteForward

Question (TL;DR) When assigning ports dynamically for remote forwarding (a.k.a. -R option), how can a script on the remote machine (for instance sourced from .bashrc) determine which ports were ...
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3answers
2k views

How to bring back SSH session that was started with the -f option (run in background)

I'm pretty lost on this. From the man page: -f Requests ssh to go to background just before command execution. After starting SSH with the -f option, I have a working tunnel. But after I ...
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1answer
192 views

Specifying a random monitoring port with autossh

I have many reverse ssh tunnels and because monitoring ports can't be reused, I am trying to find a free random port for monitoring. Meanwhile I specified -M 0 and the forwards work great and in ...
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1answer
305 views

Remote Xfce session in a separate console?

I have the following setups: A netbook with Xubuntu 14.04 and desktop PC with Debian 7. I can connect from netbook to desktop through SSH. I want to start a separate X server on netbook and host on ...
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1answer
383 views

How does a cisco device know if I'm connecting via telnet or ssh?

I'm experiencing strange behavior with a Cisco UC520 router. When I am directly connected to the router and telnet to it using this: telnet 192.168.1.1 23 Then I get a successful login prompt: ...
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2answers
102 views

SSH into multiple remote machines through ssh tunnel [duplicate]

I am new to ssh-tunneling. Basically I want to be able to get ssh access to servers in a remote lab (say subnet 1.2.3.X). I can log into a machine that is visible say 11.22.33.44 I want to be able ...
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1answer
123 views

Reverse ssh tunnel in config

How can I establish a reverse ssh tunnel with my ./ssh/config file? I'm trying to reproduce this command ssh -R 55555:localhost:22 user@host in my .ssh/config file so that when I type ssh host ...
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1answer
353 views

Work around two-factor SSH auth with Master connection and port forwarding?

The problem 1.0 I'm working on a server that only supports two-factor auth (keypair auth is disabled). So every time my SFTP client wants to upload a file, it asks me for a token... after 3 minutes ...
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1answer
189 views

Creating an SSH tunnel from a linux VPS to a web server database

I'm creating a server application that clients will connect to. The server application is running on an Ubuntu Server 14.04.1 VPS. The server needs to be able to connect to a MySQL database hosted on ...
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1answer
144 views

Tunnel HTTP traffic over ssh

Here's my setup. I have a private network with one public IPv4 address. On this private network, I have two servers, 192.168.1.10 and 192.168.1.20. .10 is my ssh bastion host. I have set up port ...
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2answers
2k views

Tunnel yum traffic through another server via ssh

I am running a Fedora desktop behind a corporate proxy that is blocking yum traffic (specifically *.gz and *.bz2). I have access to a separate RedHat machine via ssh which can download anything it ...
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4answers
7k views

Can I pipe /dev/video over ssh

I have two computers, a desktop in my office ( with a webcam attached ) and a laptop somewhere else on the network. Usually I take a look at my office through my webcam by running ssh Office -Y ...
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64 views

RDP from Windows PC to Linux

I have my Windows on network A and Linux machines on network B. I want to access the 0th desktop of one of the Linux machine from my Windows. I can ping my Windows machine on network A from the Linux ...
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1answer
147 views

Run script after GDM login into GNOME?

I recently bought a laptop and wrote a script that sets up a reverse ssh tunnel if a certain user logs in through GDM. I did this because I've had a laptop stolen in the past and would like to be ...
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3answers
9k views

SSH: tunnel without shell on ssh server

I have to set up a tunnel between two hosts. For this i use ssh in this way: ssh -L MY_LOCAL_PORT:FOREIGN_ADDRESS:FOREIGN_PORT MYUSER@SSH_SERVER after that, I login into my SSH_SERVER. How can I ...
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1answer
500 views

How do I troubleshoot ssh tunnels disconnection?

I am using SSH tunnels launched via autossh at boot on a device installed at remote locations. Up to now everything was working fine but yesterday the connection partly went down and autossh wouldn't ...
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1answer
31 views

remote desktop on host

I have a host and I need people from Europe to access application on its desktop. So far I have told them to use ssh -x -C user@host and then launch an application with application& to get the app ...
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Forcing broswers to use a different host and port when viewing websites over ssh-tunnels

I've setup an ssh tunnel to a network that has a website I need to view. However, when requesting the page my browsers sends the host localhost and url http://localhost:1234 in the HTTP headers. Is ...
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1answer
662 views

VNC & SSH : local (win-putty) -> hop (linux) -> remote (linux)

I'm gettin a headache trying to access a remote VLC & SSH. This is the situation : Local : Win box behind NAT, dynamic IP. I want to connect from here. Hop : Linux box, static IP server Remote ...
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1answer
159 views

How do you verify if an INCOMING ssh tunnel is still up and who it belongs to?

See edit below for short version I am having issues displaying the status of the ssh tunnels on our server. Here is some relevant info: user001 = remote client's username 123.123.123.123 = ssh ...
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1answer
115 views

How can I use a Raspberry Pi as a router between two WiFi networks?

I want to RDP from PC1 (Running Windows 7), to PC2 (Running Windows 7) using Pi (Raspberry Pi running Debian). This the network situation: Network1 Network2 ...
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1answer
753 views

SSH local port forwarding for web traffic requires proxy configuration in browser settings?

I enabled SSH local port forwarding with a command ssh -NL 8080:whatsmyip.org:80 <remote-sshd-machine>. Now when I opened up a Firefox and navigated to http://127.0.0.1:8080, the web-page did ...
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177 views

iptables rule to transfer UDP through a SSH tunnel

The problem I have two programs that runs on two distant computers and communicate through a specific protocol. All I know is that this protocol only communicates through UDP and uses the ports 1101 ...
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1answer
706 views

How can I mount a remote sshfs directory of an publicly inaccessible server on my inaccessible client machine?

This is an extension of the question by @Andrei How to mount remote SSHFS via intermediate machine? Tunneling? I'm in the same situation that I want to mount a remote directory, however the ...
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4answers
2k views

rsync over ssh tunnel

---------- /| /| ------------ | Home | | | | | | Work | | |--------| |---------------------| ...
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2answers
609 views

SSH tunnelling explained in layman's terms

I've just used this guide to create a SSH tunnel to bypass my corporate proxy. I didn't use the usual "Putty", but in "MobaXterm" (a program similar to putty that also offers unix tools) I wrote, to ...
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2answers
296 views

Allow multiple remote connections to an ssh Dynamic forwarded port

Let us assume I have three machines A - Server to which I am sshing to B - Client from which I am sshing C - Another Client in B's subnet Now, I set up dynamic port forwarding for port 1235 by ...
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3answers
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MySQL Workbench Cannot start SSH tunnel manager

I don't know why this error is happening when I try to connect by MySQL Workbench. Cannot start SSH tunnel manager. I'm using slackware 14.1 and installed all dependencies.    
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2answers
417 views

Auto restart ssh session after sleep

I have an active ssh session to a remote server that it would be nice to be able to restart upon waking from sleep/hibernate (ubuntu), and seamlessly restore tunnels. The Gnome Terminal window is ...
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81 views

xtightvnc through ssh gateway — connection refused

Following setup: homepc -> gateway -> workpc workpc:~$ tightvncserver :12 homepc:~$ ssh -N gatewayuser@gateway -L 1212:workpc:5912 Now I try to connect via homepc:~$ xtightvncviewer ...
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71 views

How to get information from sshd about established remote tunnels

I have a server running on which from many different places people log on via ssh and open remote ssh-tunnels to other places behind different firewalls. Now I want to try to get an overview, which ...
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0answers
2k views

How can I forward sound over VNC?

I use TightVNC and Remmina Remote Desktop to connect my Raspberry Pi to my Ubuntu laptop over VNC. It works great for the most part, except for the fact that there is no sound. I have googled all ...
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2answers
1k views

Tunnelling VPN through SSH mac

I have a pptp VPN server set up on my Raspberry Pi at home, and it works really well, except when I'm stuck behind my college's firewall. I can SSH into it through commonly open firewall ports (443, ...
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114 views

Cron job running but not establishing tunnel

I have a script which establishes a reverse tunnel on an endpoint HostB. It looks like this: cat tun.sh #!/usr/bin/env bash # Test code /usr/bin/ssh -V 1> /home/userA/bin/tun.stdout 2> ...
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147 views

Can I use `screen` to keep an ssh tunnel alive from the client?

I read here that you can keep your ssh sessions alive a bit longer using a utility called GNU screen. Is it possible to keep an SSH tunnel alive longer with this as well?
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1answer
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What is the best way to create remote tunnel?

I have 3 Linux servers: 10.0.0.0/24 - (10.0.0.10) Linux server inside my LAN. 20.0.0.0/24 - (20.0.0.10) Linux server with HTTP Apache server 50.50.50.50/32 - Server on Amazon AWS which see ...
3
votes
1answer
9k views

channel 1: open failed: administratively prohibited: open failed [duplicate]

I am trying to set up an SSH tunnel (on a Raspberry Pi) with the following command: ssh user@terbank.cs.kuleuven.be -L 5672:tabor.cs.kotnet.leuven.be:5672 -N (I should note that I can, or at least ...
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1answer
146 views

SSH tunnelling outgoing traffic shaping

I am using an OpenSSH server for a client app that uses the traffic forwarding, SSH tunnelling and some users are consuming an extraordinary amount of bandwidth. Is there a way to shape the traffic on ...
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2answers
9k views

Bash script calls expect script with master SSH connection

I'm trying to write a bash script that calls an expect script to establish a master SSH connection to be used for the remaining SSH commands in the bash script. ~/.ssh/config: ControlMaster auto ...
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1answer
392 views

autossh won't run in background

I try to set autossh to run at boot adding it to /etc/rc.local but I am unable to even get it to run in the background. This is the crucial part of my config file: Host remotehost.com LocalForward ...
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1answer
394 views

SSH tunnel to VNC on a Windows 7 system. Error: Tunnel device open failed

The system I'm trying to SSH from is Fedora 20 x86_64. The system tunneling to is Windows 7 Ultimate 32-bit and it has Cygwin installed with TigerVNC and OpenSSH. VNC is running on Windows 7 on port ...
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3answers
1k views

forwarding web traffic through a vps running on Ubuntu in another country

I've got a vps in another country. And I'd like to forward all my web traffic through it. I know there are commercial options available in the market but I'd like to do it by myself for the sake of ...
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1answer
173 views

Error “ssh_exchange_identification” with Corkscrew

I'm trying to reach my ssh server (i'm behind a corporate proxy) so I tried to use Corkscrew. My ssh server is listening on port 443, I put sshd: ALL in my /etc/hosts.allow and there's nothing into my ...
3
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1answer
153 views

limiting a user's TCP transfer quota

I've been researching how to limit a user's monthly TCP download plus upload quotas. The total transfer limit is 1 TB / month . There are 50 users, so I wish to limit each user to a maximum of 20 GB / ...
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2answers
244 views

Having ssh tunneling itself for remote access from a third machine [duplicate]

I am struggling with understanding if and how the following is possible. Say that I have a machine T (target) which I want to access from remote (ideally via ssh). T is behind a router/firewall R ...