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

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Port forwarding error

I am trying to use VNC on my KVM guest, following this guide: http://blog.scottlowe.org/2013/08/21/accessing-vnc-consoles-of-kvm-guests-via-ssh/ This is the ssh command I am using from my host: ...
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2answers
498 views

Reverse SSH “Connection closed by ::1”

I try to establish a remote ssh connection. I tried to connect "Remote" with ssh -fN -R 10110:localhost:22 GatewayUser@GatewayHost and "Gateway" with ssh -p10110 RemoteUser@localhost I got the ...
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0answers
32 views

Having troubles connecting through tunnel to a server [closed]

Since yesterday I'm failing connection to my server partition on my school server. To access to my server I need to pass through a tunnel that require a password and connect me to the server. This ...
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0answers
53 views

SSH reverse forward to a node “behind” the SSH server node

Scenario - SSH client, Windows laptop with Samba enabled (port 445. Don't care about netbios) SSH server "TestingLAB". This machine has 2 interfaces, "publicIP" which I use to connect from my ...
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1answer
864 views

ssh into a server which is connected to a VPN service

I have a virtual private server, which I would like to run a web server while my server is connected to a VPN service When the VPN connection to my provider is not up, I can do anything I want with ...
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2answers
223 views

What does “bind_address” mean in SSH port forwarding?

In SSH local forwarding: -L [bind_address:]port:host:hostport Specifies that the given port on the local (client) host is to be forwarded to the given host and port on the remote side. ...
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49 views

What kinds of IPC are used in ssh port forwarding?

SSH local forwarding is specified by: -L [bind_address:]port:host:hostport on the local host, a process called P1 attaches to port, so that P1 and the ssh client SC can communicate. What type of ...
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177 views

Which processes do the ports (as communication connection endpoints) belong to in SSH port forwarding?

(1) For remote forwarding: -R [bind_address:]port:host:hostport Specifies that the given port on the remote (server) host is to be forwarded to the given host and port on the local side. ...
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2answers
46 views

SSH Tunnel with key on first server

Im trying to tunnel to DestinationHost through HopHost with ssh -o ProxyCommand='ssh HopHostUser@HopHost nc -w 10 %h %p' DestinationHost First, I get to authenticate towards HopHost as HopHostUser ...
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1answer
42 views

SHH Tunneling only accepted on some ports

I'm working with Server running Ubuntu Server 14.04. I use Plink to request some reverse tunnels from a remote computer to the server. For some ports that works just fine, but for most ports it seems ...
2
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1answer
336 views

How do I create a SSH user that can only access MySQL?

I want to set up an SSH tunnel to my MySQL database on a remote server. Can I create an SSH user that has only the minimum permissions that are strictly necessary to access MySQL, for example with a ...
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1answer
68 views

Correct ssh config file settings to tunnel to a 3rd machine

I'm trying to tunnel to and end server via a bridge server. So far, I've been able to get it working from the command shell properly using the following command: ssh -A -t bridge_userid@...
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205 views

named pipe proxy over SSH

I am used to forwarding a remote service port on localhost using ssh like: ssh -L 2181:localhost:2182 user@server (forward remote host port 2182 to local port 2181) now, from the machine I ssh to, I ...
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45 views

Connect to work pc via ssh

I have a PC on my work which I want to connect to from home (on both machines Ubuntu 14.04 is installed). I already opened a port in my work firewall. Now I found an instruction to create a pseudo ssh ...
2
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1answer
85 views

In bash, how can I use a here document but then open stdin?

My example is that I'm tunneling through a server and want to create a command to type in a password but leave stdin open once that's done. For example I need to sudo to a different user everytime I ...
4
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1answer
215 views

Predicting the PID of previously started SSH command

This is the weirdest thing. In a script, I start an SSH tunnel like so: ssh -o StrictHostkeyChecking=no -fND 8080 foo@bar This starts an ssh instance that goes into the background, and script ...
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1answer
73 views

Reverse SSH dynamic port allotment error

When I run: ssh -i mycert -R 0:localhost:80 user@myserver.com and run the following on 'myserver.com': curl localhost:dynamicly_assigned_port I get 'ssh:Server send unrequested port, from port ...
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2answers
87 views

Openssh server: fatal: Too many listen sockets. Enlarge MAX_LISTEN_SOCKS [closed]

I am using Ubuntu 14.04 LTS. I want to create an openssh server, which listens on many ports (at least 100 different ports). Multiple clients would connect to this server, but each client would need ...
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1answer
81 views

Connecting two end-points through proxy server with SSH tunneling

I have a simple client and a HTTP server (port 80). In some cases, the client and server can exist on different locations, NAT'ed behind a firewall (allowing only outbound connections to port 80). I'...
4
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1answer
667 views

forward all mysql traffic to a ssh tunnel

I have a local application that needs to connect to a remote mysql server at 40.40.40.40:3306 The main firewall blocks all connections but ssh, I can set up a ssh tunnel and connect to the server ...
2
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2answers
96 views

Using reverse SSH tunneling in one step instead of two steps (with -X)

Suppose we have three hosts: miki - my computer behind a NAT vps0 - my VPS mum - computer of my mother, behind a different NAT. The task is to connect from my computer to my mum and keep X11 ...
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1answer
136 views

SSH Tunneling - Local and Remote Use Cases

I just learned the basics of SSH tunneling from googling. I saw this interesting question: How does reverse SSH tunneling work? But I still find it a bit confusing, more specifically on the user@...
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135 views

Reverse AutoSSH working, but the proxied LISTEN ports fail randomly

I'm having a hard time describing the error, sorry for the lengthy explanation: I have a successful, working, stable reverse AutoSSH solution nailed up between a client beagle board and a server. The ...
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0answers
17 views

Connect from firewalled server to git through connected client

The servers I am working on block port 22 on outgoing connections. But my local machine doesn't block port 22. I would like to reverse tunnel the server to my local machine, so that when I run git ...
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3answers
72 views

How to start two processes piggie-backed? So the first finishes when the second finishes?

I'm running a script with ssh commands to a server behind a jump-host. Each time I want to run a command on my server in the secure network, I need to ssh into the jump-host (bastion) server and run ...
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2answers
107 views

Can connecting to a SSH tunnel result in a vulnerability?

it's probably a noob question, but I haven't found a real answer yet. I bought a proxy service. In order to setup my browser I have to establish a SSH tunnel to their server. Since I do not want to ...
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1answer
140 views

If I use an SSH tunnel to forward a remote port to a local one, and my IP address changes, will that tunnel still work?

Simple - trying to use my personal computer as a server, by forwarding a public static IP address's port to mine, but I'm worried about Comcast pulling out the rug from underneath my feet and changing ...
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2answers
243 views

How can I maintain open ssh connection and use it from shell scripts?

Currently i invoke the following: $ ssh me@host.com my_cmd This is slow and not easy to automate safely. I would like to establish ssh connection once and have some script that will forward my ...
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157 views

SSH connection breaks after executing commands (broken pipe)

I am connecting to a remote machine on WAN and LAN networks using SSH. After logging in with username & password I type some commands in the shell. After the 2nd or 3rd command PuTTY throws the ...
2
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1answer
493 views

ssh login with a tunnel through intermediate server in a single command?

Is there a way in a single SSH command to login via SSH to a remote server passing through an intermediate server? In essence, I need to create a tunnel to my "bridge server" and via the tunnel to ...
2
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1answer
974 views

How can I remotely access an intranet website from an external network via an SSH tunnel?

I recently setup FreeIPA on an internally accessible system at home. I'd like to manage this web UI from networks that are external to my LAN, but at the same time, I don't want to have to expose this ...
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85 views

SMTP traffic being forwarded through SSH even do AllowTcpForwarding is disabled

I have a situation on one server, where it seems to be spaming over traffic being sent over SSH tunnel. Output below shows connections being made to remote SMTP server that seem to be initiated over ...
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1answer
88 views

How to ignore “Unable to connect to target host” error messages

I am using an SSH tunnel. It works fine but it gives me these messages regularly: channel 5: open failed: connect failed: Unable to connect to target host channel 4: open failed: connect failed: ...
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1answer
159 views

Ubuntu 14.04 I can't get SSH tunneling to work with -g switch?

I'm running this command on myServer: ssh -g -p 9922 -f myuser@serverOnOpenInternet -L 1212:serverBehindFirewall:80 -N serverOnOpenInternet runs sshd on port 9922. (not my call) Once I run the ...
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1answer
85 views

Forwarding traffic coming from SSH tunnel to VPN tunnel on a Linux device

I want to route network traffic that comes from one end of an ssh tunnel (constructed by ssh dynamic port-forwarding) into one end of a VPN tunnel. Given four Linux devices A, B, C and D, for ...
2
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1answer
57 views

Is sshd_config TPCKeepAlive still using unencrypted channel and therefore vulnerable

This post from 2008 in ubuntuforums recommends disabling TCPKeepAlive Disable TCP KeepAlive messages. These messages are spoofable and are sent outside of the encrypted channel, and ...
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2answers
668 views

sshfs over mosh tunnel

I am using sshfs over ssh tunnel. The reason for this is because I do not have direct access to machine from which I want to mount file system. This command establishes me tunnel: ssh -o ...
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3answers
401 views

How to browse a website as if I am in USA? [closed]

I am in Taiwan right now and whenever I go to a website that I could browse in USA, it directly transfers me to the Asia site. There is no way to browse the USA version of the site, probably because ...
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2answers
81 views

How SSH Tunneling is working

can someone explain how the following ssh tunneling is working ? ssh root@localhost -P 2222 -pw 1234 L 3300:remote_WIN_machine1:3389 this ssh command is running from Linux machine while the remote ...
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1answer
69 views

Tunnelling through multiple machines on Red Hat with varying users and keys

I'm trying to SSH tunnel hop to a Tomcat7 server where JMX was configured on port 9090. Essentially: localhost > hostB > hostC. In a terminal, from localhost to hostB: ssh -L 8989:localhost:...
2
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0answers
69 views

user@localhost password not accepted when ssh-ing through a tunnel [closed]

I am trying to log into a workstation through another server, following this guide http://serverfault.com/questions/53080/how-to-enable-ssh-x11-forwarding-through-additional-server Step 1, connecting ...
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0answers
159 views

Accessing forwarded port via SSL/TLS

I have a Raspberry Pi that sets up an SSH tunnel with my VPS so that I can access several things remotely. My Pi forwards its local port 80 to my VPS's port 3180, so I can access it via http://domain....
2
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1answer
409 views

Does `ssh -D` proxy DNS request?

Is DNS resolution tunneled to the other end when I use a SOCKS proxy created with ssh -D? I have read the manual, searched the Internet, and found no documentation relevant.
2
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1answer
1k views

Why SSH login works in shell but fails in all third parties via ssh tunnel?

I'm using ssh to log in (prompt password first time) on a remote server. In shell, using this command: ssh root@myserver.com works well! But all other db software applications that I tested (...
2
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1answer
59 views

Correctly closing multiple hop SSH tunnel

I want to tunnel VNC traffic to host2, which is only accessible from host1, whereas host1 is publicly accessible. I setup a multi-hop SSH tunnel as described in this question, using: ssh -L 5901:...
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135 views

It is possible to make an IPSEC VPN Bonding?

I wanted to know if It is possible to bound two IPSEC tunnels ? I've already done a VPN bonding of SSH tunnels, but It will be better if I use IPSEC.
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0answers
248 views

Tunnel audio chat over ssh

I'm running a HelpDesk for internal call center employees. Right now, we can chat with employees over our web portal and remote-control their Linux Mint workstations via VNC over a secure SSH tunnel. ...
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2answers
9k views

Channel 0: open failed: administratively prohibited: open failed

I was doing this tutorial, but when it comes to the part where O should run these commands: local-server# ssh -NTCf -w 0:0 87.117.217.27 local-server# ssh -NTCf -w 1:1 87.117.217.44 It says: ...
2
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1answer
2k views

ssh tunneling: connection closed by foreign host

I'm trying to create a scenario to test a simple ssh tunneling, just for using a simple telnet. I have two hosts: ubuntu and suse. Both of them have the other hostname on /etc/hosts file for address ...
0
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1answer
61 views

What's the diference between a SSH tunnel and a VPN? [closed]

What situations do I have to use one in detriment to the other? I believe that both serves for the same situations at the most of the case, isn't?