Strange thing with iptables

[Szabolcs Gyurko]

Hi all,


I found a strange issue with the iptables. One of my friend showed me a  
rule
which looked like:

iptables -A FORWARD -s $machine/255.255.0.255 -j ACCEPT


What I was surprised on is the netmask. Is this a feature or a bug? I mean
this is quite strange netmask for me.

Thanks for any answers,

-- 
Szabolcs Gyurko