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

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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
325 views

How do I route a spare network interface through an SSH tunnel?

I just bought a Raspberry Pi and I am wanting to route an ad hoc wireless network interface fully through an SSH tunnel that was created using another wireless interface. I want to do this so that I ...
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2answers
28 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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388 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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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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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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20 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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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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x11 connection established but magic-cookie value different?

From my local machine I ssh to a remote server along with authentication regarding X display. I know that in this process, MIT-MAGIC-COOKIES are used and the value in both server and client needs to ...
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54 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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13answers
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SSH tunneling error: “channel 1: open failed: administratively prohibited: open failed”

When I open this ssh tunnel: ssh -nXNT -p 22 localhost -L 0.0.0.0:8984:remote:8983 I get this error when trying to access the HTTP server running on localhost:8984: channel 1: open failed: ...
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Proxy from OSX laptop to debian server for web browsing

I want to setup a proxy from my OSX laptop (10.9) to a debian server via SSH, to browse the net via that server. The debian server has an openssh-server running, and I can login. I tried several ...
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2answers
586 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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1answer
118 views

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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0answers
56 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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1answer
39 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 ...
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1answer
1k views

channel 1: open failed: administratively prohibited: open failed

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
57 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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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
67 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
49 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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216 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
50 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 ...
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1answer
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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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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 ...
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1answer
49 views

How can I tell which ports have been used for reverse SSH tunnels?

I have two machines, client and server. client has created a reverse-tunnel on server with something like ssh -R 12345:localhost:12345 server. When logged into server how could I find ports which ...
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1answer
78 views

Understanding interface forwarding with VPN

I have a server with static IP address that I rented (Debian on it), and I have a server with a server at home which I bought and setup as home server (with Ubuntu Server). What I would like to do ...
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1answer
536 views

How to create a SSH tunnel over 2 servers?

I have 2 servers, A and B. I want to create a tunnel from my system to server B but I have some limits to do this. So I have to first tunnel to server A and from server A to server B. My goal is to ...
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2answers
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SSH -L Tunnel no longer working

Local machine running my scripts needs to access a remote server's DB. Last week I could do, on the local machine ssh -f -N -T -L1081:localhost:3306 ueser@remoteserver -p2222 on the local machine: ...
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1answer
90 views

use SSH tunnel to baypass Captive portal

I know that DNS tunneling is the good choice when we try to bypass captive portal, but i tried to do SSH tunneling instead of DNS but it doesn't works, technically speaking is that possible -bypass ...
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SSH tunneling through a busybox router

I have a busybox router and I'm able to login to the console using telnet & I also have access to the web interface. My question is, how can I create an ssh tunnel from my local network through ...
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2answers
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ssh tunnelling explanation

I have a question regarding ssh tunneling. I've read this article http://www.popcornfarmer.com/2009/01/ssh-tunneling-tutorial/ I would like to make X forwarding work and run some X applications ...
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Understanding SSH tunnels

I have linux (Ubuntu) server which I have root access to through ssh (port 22) only. On that server there is a MySQL database listening on port 3306. Is it possible to use putty (on my machine) and ...
39
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4answers
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How does reverse SSH tunneling work?

As I understand this, firewalls (assuming default settings) deny all incoming traffic that has no prior corresponding outgoing traffic. Based on Reversing an ssh connection and SSH Tunneling Made ...
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1answer
39 views

log into a machine through another, with (de)compression at the ends only [duplicate]

I have looked all around but couldn't find the answer to a very simply question: I would like to log into machine C from machine A, passing through machine B. However, B is slow, so I would also like ...
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1answer
2k views

start autossh reverse tunnel automatically when network comes up

I connect from my home PC thru an Internet server I own to a restricted client (that I also own) using a reverse ssh tunnel. I have a script that sets up the restricted client to middleman leg of ...
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4answers
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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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2answers
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Attach to an existing ssh tunnel

I have an existing ssh tunnel which connects machine A to C over B. #user@A: ssh -N user@B -L 9999:C:9999 Is there any way to create a new ssh tunnel on D and attach it to the existing tunnel so ...
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1answer
151 views

Directx application using wine over ssh -x

I'm trying to run a Windows app (Artemis video game - server mode) on my archlinux server. As it is an windows application I have to run it using Wine. As I'd like to be able to launch the server ...
0
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1answer
59 views

Connect to LAN resource via ssh tunnel

I have the following problem. From machine A I connect to machine B over the internet via ssh and port forwarding. Machine B is part of my local network and has connection to machine C which acts as a ...
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2answers
152 views

Find which ports a program access

I have a program that tries to connect to a server on start-up on a unknown port. I need to find out which port the program accesses to enable a ssh tunnel. I tried netstat but since the connection ...
2
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1answer
122 views

Creating a linux user with limited privileges for ssh tunnelling

I am following this post to create ssh tunnel to mysql. The details description of my application scenario is given in my other SOQ. I exactly followed these steps to create a user: useradd -s ...
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1answer
99 views

Double port forwarding - SSH

NOTE: I'm not explaining why I want to do this. But here is the requirement. There are 4 hosts. Host A, Host B, Host C, Host D Host A is running some application which can be accessed at port 8001 ...
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1answer
112 views

Give an access to Internet to a server reachable by SSH but where Internet is blocked

I can use my home computer A to connect by SSH to a server B where access to the external network is blocked. In other words, all requests to Internet from B throw an error: Network is unreachable. ...
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1answer
190 views

Multiple SSH tunnel through raspberry pi?

In my home network I have a PC, raspberry pi, macbook and a few other devices which I want to access away from home. As it stands, I have setup VNC server on my PC along with remote desktop and have ...
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ssh connection hangs when looking up a SERVFAIL domain

Scenario: I am browsing the internet through an ssh -D port-forwarding tunnel, both browsing (http, https, ...) connections and domain lookup queries are done using this SOCKS 5 local proxy. The ...
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1answer
36 views

Supply additional ssh options in config file

How can I supply additional options in .ssh/config? I know that information like Host, Port, User etc. may be used in the ssh-configuration file to abbreviate ssh commands. I frequently create ...
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2answers
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Tunnels to the same port number

I have an application that connects to several hosts on the same port: a.protected:123 b.protected:123 I don't have direct access to either of them, but I can make a ssh tunnel (through ...
3
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3answers
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How do I tunnel SSH over SSH?

I have successfully setup a tunnel over SSH on linux mint, and can browse the web. However, when I try to ssh using the same port, I get: Couldn't establish connection to proxy: Network is ...