Originally Posted by centosboy
ok..add the udp rule again and wait 5 mins.
then post the output of
iptables -L INPUT -n -v
we want to see if the package counter for the udp rule increases....
I've an issue with blocking UDP packets too,
I'm receving a heavy UDP broadcast traffic from a server in an European data center to my server in the same DC,
all traffics are in UDP protocol and blocking the IP block of broadcaster with iptables didn't fix it, I can still see the packets are comming via tcpdump and iptables doesn't drop them because iptables -L INPUT -n -v show no packet drop.
I've used this rule in iptables to drop them:
iptables -I INPUT -s xxx.xxx.xxx.0/24 -p UDP -j DROP
Any one knows a way to drop them? they are making my server's load to 6 or 7 and all my traffic statistics are croupted now.