I want to use connlimit to set the connections of each person to a certain number, but when I add a rule using iptables, error occured like these: [root@server1 linux]# /sbin/iptables -A INPUT -m connlimit --connlimit-above 6 -j DROP iptables: No chain/target/match by that name I have searched for this problem, someone said it maybe need to load the ipt_connlimit module. I tried it, but it can not work. I doubted that I have the wrong command. first I use '/sbin/modprobe ipt_connlimit' command ,and then I reaceive the error 'FATAL: Module ipt_connlimit not found.' second, I use '/sbin/modprobe /lib/iptables/libipt_connlimit.so' and then error comes again 'FATAL: Module /lib/iptables/libipt_connlimit.so not found.' How to make it work ? I'm almost mad Thank for your advise