An SSH tunnel leverages the SSH protocol to transport unencrypted data through an encrypted connection.

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28 views

SSH from Windows to Jump Server to MySQL

We have a MySQL instance running on a Linux machine and had to open a tunnel to access the server. This worked fine until admin decided to add a steppingstone / jump server. Now i can't seem to ...
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2answers
38 views

“Cannot open SSH Tunnel” on MySQL (corrected)

(help, patience and mercy... begginer lost haha) -Ok heres the deal, im trying to connect a EC2 Instance to MySQL throught SSH in MySQL Worckbrench -I set up the configurations this way SSH ...
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15 views

SSH tunnel freezes and says “administratively prohibited” when a domain cannot be resolved [migrated]

So I am opening a SSH tunnel to a remote server to use it as proxy: ssh -D 10000 -N remote I use FireFox with FoxyProxy and it is working quite well. Except sometimes the tunnel freezes. A good ...
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1answer
24 views

SSH Remote Forwarding with two hops

How can I make ports forwarded or proxied by ssh available to machines other than the local machine? e.g. machine A connecting to machine B (works) ssh -L8080:some-service:8080 user@machine-B ...
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1answer
25 views

Access a remotely inaccessible webapp through an accessible server [closed]

I need to access a locally developed webapp (port 80), which is for the time being inside a computer that cannot be accessed remotely: local machine (for ex. it's behind a firewall). So, what I ...
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30 views

Why ssh tunnel cannot create in the virtualbox or qemu with force mode (-f)?

I try on the dedicated server root@debian:~# strace -e open -f sshpass -p guest ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null guest@198.51.100.11 -C -N -D 127.0.0.1:22220 -f [pid ...
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29 views

(reverse-) ssh connection “time out during banner exchange”

I have set up a few 100 embedded boxes to contact HQ by opening up reverse ssh tunnels, each under a new port. This is mostly working fine, but today I encountered a problem with using the tunnel ...
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1answer
45 views

How to force an ssh tunnel (or a ProxyCommand) to use an existing master connection? [closed]

There are three machines A, B and C running linux. I have root access to machines A and B but not to C. A is my local machine and I want to connect to C. C is only reachable through ssh over VPN. I ...
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1answer
190 views

How to SSH to ec2 instance in VPC private subnet via NAT server

I have created a VPC in aws with a public subnet and a private subnet. The private subnet does not have direct access to external network. So, there is a NAT server in public subnet which forward all ...
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2answers
87 views

tunnel port 8080 over jumpserver using ssh - socks5 proxy?

I have this setup: LocalPC - Jumpserver - Webserver with page only accessible on this machine via localhost:8080 LocalPC and Webserver are not connected - Jumpserver has to be used. Jumpserver ...
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2answers
103 views

Improving speed of large file transfer over high latency link

So, I've recently had the need to pull a large file over the internet from one of our offices overseas. Both offices have 50Mbit fibre links in both directions, but the round-trip-time is horrendous ...
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1answer
30 views

SSH Tunneling and LAMP at same time

I am tunneling Firefox through SSH to a remote server using: ssh -D 9999 -C usr@remotehost.com This binds 9999 port on localhost. I set this up in Firefox proxy settings using Socks5. It works ...
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3answers
181 views

make program installs via ssh tunelling on CentOs system

I have a Machine A with no access to internet. I have a Machine B with access to internet. A & B can connect to each other via ssh. I'd like to make some program installs on A (perl, R package ...
0
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1answer
39 views

how to access a private host through a public one

I have a number of AWS EC2 instances, one of them has a public IP address, the rest do not have public IP addresses. I have set up SSH access to the public machine using a private/public key pair. I ...
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0answers
30 views

Centralize way to prevent interactive logins

I have an Ubuntu server that is used for two primary purposes for my students: To hold on to files that students need to temporarily upload for my assessment (ie: I give them an input image, and ...
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1answer
107 views

ssh tunneling not working due to strict iptables

my iptables are set so that I can only allow ssh connections. I tried ssh tunneling and I can connect to my sever, but after when I try using my server as a proxy on firefox, pages try to load ...
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1answer
58 views

ssh multiplexing via port forwarding

I'm trying to create a setup where one could "ssh" to a specific port on localhost and then get forwarded to a remote server and into a shell, without the need to enter credentials (nope, secret key ...
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1answer
45 views

ssh tunnel through two-factor auth

I need to connect to server using SSH, and the server has two-factor authentication enabled and secretkey disabled. Now, I can connect "manually" form the shell with the help of Google authenticator ...
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1answer
95 views

Site to site ssh tunnel

I have two virtual environment at different locations, and I want to set up site to site ssh tunnel for contact between those networks. I have configured the ssh tunnel on both sides with routes to ...
2
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1answer
177 views

Making proxy available on remote server through ssh tunneling

I know I can use ssh tunneling to create a "proxy" on my machine so that I can make all the traffic generated locally go through a remote server. Like this: $ ssh -D 12345 myuser@remote_ssh_server ...
2
votes
1answer
256 views

How to get the list of SSH tunnels connected with the username used?

The connection is established from Desktop(D) to Server(S) with ssh -D PORT username@Server. From the Server, the list of ssh users connected can be obtained with who, but the ssh tunnels are not ...
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2answers
497 views

How do I resolve OpenSSH protocol mismatch? [closed]

I'm trying to get around a hospital firewall. I can SSH into my devbox on Port 443: ssh -L 8080:devbox:443 root@devbox -p 443 But I can't actually get the devbox to load in my browser. When I go ...
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1answer
62 views

Receiving incoming traffic without external IP and port forwarding

I have a virtual machine in the datacenter with an external IP. I can connect via SSH to this virtual machine from my desktop, but this virtual machine has no way of accessing any ports on my desktop. ...
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0answers
75 views

Can My Company Block Websites Though An SSH Tunnel?

I am trying to tunnel through a firewall on a client site so that I can reach my company email. I have created an SSH Tunnel using putty by adding a Dynamic port (6666) in the Tunnels then logging ...
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27 views

SSH into EC2 instance through a “bridge” instance

I need to ssh into an EC2 instance which can only be accessed from another EC2 instance. So I've tried something like this ssh -N -L -i target_instance.pem localhost:22:ec2-user@10.0.0.1 -i ...
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1answer
58 views

setup ssh a special kind of ssh tunnel

Ok so I have run into a pickle. I have a web application that I really need to demo this weekend. I can't demo it unless my sysadmin (who is off work) takes down client SSL authentication. There is ...
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1answer
203 views

Proxy a remote web host to appear as localhost (via ssh tunnel)

I'm developing a web app that needs to embed pages from a legacy web app in an iframe, which needs to be recognised as the same origin to allow the page to mess with the iframe contents via ...
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0answers
143 views

Redirecting traffic through ssh tunnel

I'm trying to redirect the traffic coming from clients to external proxy server. I've the following architecture +----------------------------+ ...
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2answers
181 views

SSH tunneling in background

I'm trying to tunnel my production mongo server to my test server, so, I can perform some tests. I know I can simply establish a tunnel by ssh -L, but I need to run this as a background process as I ...
0
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1answer
107 views

SSH connection timing out on certain clients only

I have a server that has around 100 SSH tunnel connections active from client servers across Canada and the US. We use the same device that runs a custom build of Ubuntu and load that on each client ...
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3answers
1k views

MySQL access denied error when connecting via SSH tunnel

For months I've been connecting to the MySQL instance running on our local test server through an SSH tunnel without any issues. All of sudden though, with no changes I can think of, the server has ...
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1answer
117 views

SSH Tunnel - Proxy Not Working From Remote Location (Login is working)

I have just set up a Cygwin SSH server and successfully tunneled to it from a remote location. Logging in works but when I point my browser to localhost 8888 (sock 5), all connections are refused. ...
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38 views

SMB reverse port forward fails to connect

I have a rather complex server setup consisting of a reverse SSH tunnel through a Linux VPS. Namely, server A is a Mac Mini and runs a script which reverse tunnels to the VPS, which we'll call B. ...
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1answer
215 views

Apache / Tomcat AJP DNS failures when tunneling

I have a situation where I can access a private NAT-ed apache2.4 / tomcat7.0 railo4.2 server directly from the host or local network but when tunneling in through an SSH remote port forward the ...
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269 views

Multiple Reverse SSH Tunnels using Single Port

I am able to accept reverse SSH connections from multiple remote systems on a single server using a port for each connection: Remote A: ssh -fN -R5000:localhost:22 user@server-ip -p22 Remote B: ssh ...
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278 views

Mysql through ssh often can't connect or timeout

I have a MariaDB server (10.0.12) on a machine (Ubuntu 14.04) that other servers connect to through ssh for security purpose. The ssh tunnel is openned via autossh like so: autossh -M 3306 -f -Ng ...
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1answer
71 views

Cannot remote copy file via tunnel [closed]

I'm trying to get a file from server1 (localhost) with scp. I am accessing server1 from the gateway server2 (that is the only one accessible from the internet). I am able to open a ssh connection by ...
0
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1answer
174 views

Control outgoing interface linux SSH tunnel [duplicate]

I am using a simple socks proxy in my browser. I create the socks using ssh -D myremote.server Now all requests go via the primary IP address of myremote.server. Can I change this behaviour that ...
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2answers
473 views

SSH connection falling down

I've set up a connection with autossh that creates some tunnels at system startup, but if I try to connect, after successful login (with RSA key) connection fall down, here a trace: debug1: ...
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0answers
143 views

SSH Fails to Disconnect after Interruption

I have a set of issues, all combining to make for one nasty problem. The background: I have a server behind a firewall reverse tunneling using an external VPS (we'll call the server "the server" and ...
1
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4answers
226 views

Prevent closing of SSH Local Port Forwarding

I am running various services on an Ubuntu virtual machine running on Azure, and I would like to access some of the services remotely, even though the ports are not open publicly. To do so I have set ...
3
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0answers
23 views

restrict ssh reverse portforwarding per user [duplicate]

I have a server that needs to accept incoming ssh connections with portforwarding. The incoming clients request a port forward from a port on the server to a port locally. They authenticate using a ...
1
vote
1answer
4k views

how to connect to mongodb server via ssh tunnel

It was easy for me to connect to my remote mysql server on AWS using a sequelpro, however I'm struggling with doing the same thing with mongodb. I tried setting up an ssh tunnel via command line ...
1
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2answers
975 views

Setting up a tunnel with putty, jump server for using synergy

Long time ago I set up an environment where my Linux machine (LM) was a synergy server and my Windows machine (WM) the synergy client as described here. Since our admin put in a Linux jump server ...
1
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4answers
3k views

SSH remote port forwarding failed

Follow-Up: It looks like the rapid series of disconnects coinciding with a few months of running each server is probably coincidental and just served to reveal the actual problem. The reason it ...
1
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3answers
304 views

RealVNC SSH tunnel still warns of unencrypted connection

I'm using Putty and RealVNC to establish a secure connection to an OSX 10.9 server machine. I've tried to run this connection over an ssh tunnel I set up, but the client warns of an unencryted ...
1
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1answer
86 views

restrict shell commands for munin-node (netcat)

I've spent fair amount of day fiddling with this, and I'm about to give up (for today). I followed the instructions outlined here. All works at the moment. But to increase security I'd like to ...
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2answers
553 views

Number of SSH connections rises, and blocks data?

We have a client server setup, where the client sets up an SSH tunnel and uses port forwarding to send data to the server: ssh -N -L 5000:localhost:5500 user@serveraddress The normal number of SSH ...
0
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1answer
96 views

Access Internal Website from Public Internet

I have the current setup: laptop -> gatekeeper -> master_server -> my_machine There are 3 SSH's that I need to do to get to my_machine and I found a solution to do it in one step by editing SSH's ...
0
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1answer
159 views

RDP through SSH tunnel fails [closed]

I'm trying to set up RDP through SSH tunneling to an Amazon EC2 instance, but it is failing. I have set up PuTTY properly and can connect to the remote server via RDP and log in, but after successful ...