Ok I have the following problem.
iptables -A OUTPUT -o ppp0 -p tcp -m length --length :40 -j MARK
--set-mark 10
That should mark all ACK's or not ?
When I try to do this I get the error:
iptables: Invalid argument
I found out that this has something to do with the length match.
Because not used I don't get an error message. I looked around and found
an example in netfilter-extensions-HOWTO with icmp:
iptables -A INPUT -p icmp --icmp-type echo-request -m length --length
86:0xffff -j DROP
When I try to do something like this it doesn't work too :(
So now my question is what am I doin wrong ?
Sorry I'm not an iptables guy an I only tried a script from somewhere
else. But this one line doesn't work.
anyone can help me ?
Thx
Joerg Esser
