I used instead 5432 as the Source port and my.tunnel.domain:5432 as the Destination. Using the accepted answer you'll enter the proxy server as the host name of the session. So in this step of that PuTTY SSH tunnel tutorial. Using my solution, you need to enter the final host name (the protected server you want to log in to) in the session settings. Please note that the approach is a little different from the accepted answer. (I think you need a full path to plink if the program folder is not in your PATH) Using this solution I can easily change the settings of the proxy server in one place. The reason I did it this way, is that I need a specific proxy for a lot of sessions. Replace «session name» by the name of the Putty session you want to use as a proxy. In the options under Connection > Proxy you select 'Local' as the proxy type and as local proxy command you enter plink "«session name»" -agent -nc %host:%port. In addition to the accepted answer, which uses SSH on the remote side as a proxy, you can also use plink (you can get it on the offical Putty site) as a local proxy. Now, create this script as hosta:/home/tunnel/check_ssh_tunnel.I know it's an old question, but I think it's still useful to add an alternative. You might also set some SSH options like the destination port in ~/.ssh/config. PC Windows If you dont have a SSH client with TUNNELING functions, you can download PuTTY SSH Client for Windows PuTTY Configuration in Tunnels menu: define. Depending on your configuration, you might need to allow the user ‘tunnel’ in /etc/ssh/sshd_config. ssh/authorized_keys # Now paste in the public key for this point you should be able to ssh from to without using a password. Ssh-rsa blahAAAAB3NzaC1yc2EAAAABIwAAAQEA.6BEKKCxTIxgBqjLP create a ‘tunnel’ user on Host B and save the public key for in the authorized_keys file ~]# useradd -d /home/tunnel ~]# passwd tunnel # Set a strong ~]# su - ~]# mkdir ~]# vi. Your public key has been saved in /home/tunnel/.ssh/id_rsa.pub.Ħf:30:b8:e1:36:49:74:b9:32:68:6e:bf:3e:62:d3:c2 cat out the id_rsa.pub file which contains the public key that we will need to put on host b: ~]# cat /.ssh/id_rsa.pub Access a server using an SSH tunnel on Linux and Mac OS X. In the SOCKS Host box enter localhost and for Port enter 31415 (or whatever you set your SSH Tunnel up with). In the instructions below we have selected PuTTY, a free SSH client for Windows and UNIX platforms. Under Configure Proxies to Access the Internet select the Manual proxy configuration radio button. Your identification has been saved in /home/tunnel/.ssh/id_rsa. Under Advanced, in the middle of the page, select Network -> Connection -> Settings. Now create a public/private key pair: ~]$ ssh-keygenĮnter file in which to save the key (/home/tunnel/.ssh/id_rsa): # hit enter to accept the defaultĮnter passphrase (empty for no passphrase): # don't use a passphrase I’ll refer to the box that initiates the connection as Host A, and the box that we connect to as Host B.Ĭreate a ‘tunnel’ user on Host A: ~]# useradd -d /home/tunnel ~]# passwd tunnel # Set a strong ~]# su - tunnel # Become the user 'tunnel' SSH allows you to map both local and remote ports, so it doesn’t really matter which end of the connection you choose to initiate the connection. That user will then be used to create the tunnel and run a script via cron to ensure that it remains up.įirst, select one of the servers that will initiate the SSH connection. and create a new local tunnel with the source port 4000 (123 in the image) and the destination localhost:3306 (localhost:456 in the image). The steps described here will create an unprivileged user named ‘tunnel’ on each server. Start Putty and enter your usual connection settings (Hostname or IP address) In the tree on the left side, navigate to. The SSH commands for port forwarding can be found in the ssh man page. Google can identify plenty of resources regarding the fundamental SSH commands for port forwarding but I didn’t ever find a good resource for setting up a connection and ensuring that it remains active, which is what I hope to provide here. My need was to allow regular non-encrypted MySQL connections over an encrypted tunnel, but there could be many other uses as well. In other words, you are firstly doing an SSH connection to jumphost. With this command, you are tunneling the port 1521 of localhost to the port 1521 of dbserver. I recently had a need to create a permanent SSH tunnel between Linux servers. Start Putty and enter your usual connection settings (Hostname or IP address) In the tree on the left side, navigate to. The following command creates this SSH tunnel via the Jump host (you will be prompted for the users' password): ssh -v -N appusrappserver -J myusrjumphost -L 1521:dbserver:1521.
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