autossh
Automatically restart SSH sessions and tunnels
Autossh is a program to start a copy of ssh and monitor it, restarting it as necessary should it die or stop passing traffic. The idea and the mechanism are from rstunnel (Reliable SSH Tunnel), but implemented in C. The author's view is that it is not as fiddly as rstunnel to get to work. Connection monitoring using a loop of port forwardings. Backs off on rate of connection attempts when experiencing rapid failures such as connection refused.
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