IPMON Format ???

[bsd at perimeter.co.za]

Hi all! 

A little help please with understanding the format of ipmon.log. 

I have entries like this (mind line-wrap):
===========================
Sep 11 14:52:46 fox ipmon[47]: 14:52:45.248487 2x ed1 @0:3 P 
196.23.158.10,25 -> 196.22.178.91,26704 PR tcp len 20 40 -A K-S
OUT
=========================== 

I have been able to figure out what it all means by reference to "man 
ipmon", except for the following two things: 

1) the "2x" before the interface name (ed1).
2) the "K-S" right near the end of the line, before "OUT". 

What do these two fields mean? 

Regards,
Patrick.