Re: bin/56129 (ftp(1) should keep control session during large xfer)

[Havard Eidnes <he%NetBSD.org@localhost>]

>  I set TCP keepalive to 20 mins:
>
>  $ sudo sysctl -w net.inet.tcp.keepidle=$(( (20*60) * $(sysctl -n net.inet.tcp.slowhz) ))

Oh?

On my host that operation would set it to 40 minutes.

tcp(4) says the default value for TCP_KEEPIDLE is 4 hours, which
corresponds to

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.

Regards,

- Håvard