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Re: bin/56129 (ftp(1) should keep control session during large xfer)
> I set TCP keepalive to 20 mins:
> $ sudo sysctl -w net.inet.tcp.keepidle=$(( (20*60) * $(sysctl -n net.inet.tcp.slowhz) ))
On my host that operation would set it to 40 minutes.
tcp(4) says the default value for TCP_KEEPIDLE is 4 hours, which
net.inet.tcp.keepidle = 14400
which means this value should be specified in seconds.
So if you have a device on the path with a 30min NAT translation
time-out, you'll still lose.
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