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Old 6th February 2013
KBr KBr is offline
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Join Date: May 2012
Posts: 5

As it seems, window scaling is active:

root:2# sysctl net.inet.tcp.rfc1323

and I see the wscale term in the output of the pfctl command.
It's OpenBSD 5.0. I hope it's ok so far, I am not keen on updating this box. Thank you for the link. Much to read. May be I get another hint there.

Originally Posted by J65nko View Post
You could check whether]TCP window scaling is working.

# pfctl -vvss | grep -C1 wscale
all tcp ( <-       FIN_WAIT_2:FIN_WAIT_2
   [2816903347 + 102808] wscale 3  [1483341881 + 17376] wscale 3
   age 00:00:54, expires in 00:00:41, 239:386 pkts, 12440:575325 bytes, rule 29
Create TCP states on the initial SYN packet for an explanation.

Which version of OpenBSD are you using?
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