SSH Tunnel

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Selecting the SSH Tunnel option will automatically spawn a SSH tunnel process that

the current connection will use.  The tunnel process can be shared if two connections use the same port.

This is useful when you are using a SSH server as a relay to another host. (A <-->B<-->C).

 

 

The SQL keep alive option is for use in a relay situation (A <-->B<-->C)

 

By default the SSH tunnel will automatically send keep a alive between A and B, but not between B and C.

When checked, the SQL keep alive will issue a query to the pg_database system table with a limit of one row set.

This will keep the connection alive from A to C.

 

A connection that is connected via a SSH tunnel will have a red screen: