I’m using ssh as a SOCKS5 proxy, connecting to my personal server. When my system is suspended or I lose internet connection, the ssh will eventually time out, forcing me to manually reconnect. How can I configure my system to automatically reconnect as soon as an internet connection is established?
Answers:
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Method 1
I used to have a “reverse ssh” script like
laddr=*:0
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port=some_port
while :; do
t0=$(date +%s)
ssh -R "$laddr:localhost:22"
-o BatchMode=yes
-o CheckHostIP=no
-o ExitOnForwardFailure=yes
-o ServerAliveInterval=15
-o ConnectTimeout=15
-p "$port" "$host"
t1=$(date +%s)
sleep "$((60 / (t1 - t0 + 1)))"
done
which was supposed to try to connect immediately after the connection was lost, but wait a minute if ssh was terminating immediately, in order not to hammer the server or run a wild loop.
But I have long time ago replaced it with something better — “service”-like.
Systemd & co are probably offering similar features.
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