I recently installed CSF firewall and have made live a new server which is accepting around 600req/second.
Its basically a reverse proxy and I found in pingdom and munin that for a particular time, the response times of the server increased by 3 folds. I looked into logs and exactly at that point, I found loads of entries like this:
Feb 27 15:22:09 li235-57 dhclient: DHCPREQUEST of <My IP address> on eth0 to 184.108.40.206 port 67 Feb 27 15:22:09 li235-57 dhclient: send_packet: Operation not permitted
Can you help me understand what went wrong and what exactly happened? Is there any settings I should change in CSF or any pointer to debug this further?