SSH to the server and run The following command to see the IPs with most concurrent connections:

• /bin/netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n |more
• Block un-wanted IPs using IPTables
• /sbin/iptables -I INPUT -s 12.34.56.78 -j DROP
• /sbin/service iptables save
• /sbin/service iptables restart

Other articles in this Category

How can I tranfser my data from one server to another?

Linux Text Editors :: pico, vi, and emacs

What ports do I need to open in my firewall?

HTML Codes

HowTo list all files installed by an RPM package

How can I find the local path to a command line binary?

I added more RAM Memory, yet the system shows the wrong amount

perl: warning: Setting locale failed.

HowTo :: manage Linux partitions

HowTo :: check on the current version of CentOS installed on your server

HowTo clone, image, and re-size your Hard Drive(s) and/or partition(s)

HowTo :: remove the Pass Phrase set on an SSL key

Is rebooting my Linux/FreeBSD server a useful practice?