Iptables Block Netbios Broadcasts UDP 137-138

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I cannot block LAN netbios broadcasts on a fedora core
2 Iptables box being used as an IDS.

It is therefore being 99% flooded with broadcasts.

I've tried:

iptables -A INPUT -p UDP --dport 137 -j DROP
iptables -A INPUT -p UDP --dport 137 -s 0/0 -j DROP
iptables -A INPUT -p UDP --dport 137 -s 192.168.0.0/24
-j DROP

Nothing prevents them from getting through.

Is there anyway to do this?

If possible can someone email me direct at
realcucumber@xxxxxxxxxxx

Thanks for any help in advance.



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