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Update telnet_server.py
Set tcp keepalive timers to 60 seconds. Seems to default to 2 hours on ubuntu 22. Most firewalls will age out an idle tcp session at 1 hour. Will not address telnet console failing after a tcp session has failed (TimeoutError).
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@ -190,6 +190,11 @@ class AsyncioTelnetServer:
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sock = network_writer.get_extra_info("socket")
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
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sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
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# 60 sec keep alives, close tcp session after 4 missed
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# Will keep a firewall from aging out telnet console.
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writer_sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, 60)
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writer_sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, 10)
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writer_sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, 4)
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#log.debug("New connection from {}".format(sock.getpeername()))
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# Keep track of connected clients
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