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--- doku:vpn_ssh_access [2022/11/04 10:47] – [Parameters in .ssh/config] goldenberg
+++ doku:vpn_ssh_access [2024/02/16 11:23] – Jump host (-J) instead of agent forwarding (-A) mpfister
@@ Line 57: / Line 57: @@
 </code>
-=== Forwarding the ssh-agent over multiple servers ===
+=== Using a jump host ===
-If the machine to which one wants to login is reachable only over one or several hops in between, the ssh-agent of the local machine can be forwarded to the machines in between using the '-A' option of the 'ssh' command. Prerequisite is that on all remote hosts the public key has been added to the 'authorized_keys' file as described above. For example, a connection to VSC-4 over the 'login.univie.ac.at' machine would look like this :
+It is also possible to use SSH keys if the machine to which one wants to login is reachable only over one or several hops in between. To do this, use the command ''-J'' to specify the jump host. Prerequisite is that on all remote hosts the public key has been added to the ''authorized_keys'' file as described above. For example, a connection to VSC-5 over the ''login.univie.ac.at'' machine would look like this :
 <code>
-user@host:~$ ssh -p27 -X -A -t <uni_username>@login.univie.ac.at ssh -p27 -X <vsc_username>@vsc4.vsc.ac.at
+user@host:~$ ssh -p27 -X -t -J <uni_username>@login.univie.ac.at <vsc_username>@vsc5.vsc.ac.at
 </code>