CentOS 6.5 Iptables conntrack module

Question

I have a VPS server on which CentOS 6.5 x64 is installed. Kernel version from uname command is 2.6.18-028stab107.

When I want to use iptables rate limiting like in the following command, I got the error message below.

iptables -I INPUT -p tcp --dport 80 -m state --state NEW -m recent --set
iptables: No chain/target/match by that name.

I think required conntrack modules are not installed on system, lsmod command output is empty.

[root@myserver ~]# lsmod
Module                  Size  Used by

I try to load modules like below, and got the errors.

[root@myserver ~]# modprobe ip_conntrack
FATAL: Module ip_conntrack not found.
[root@myserver ~]# modprobe nf_conntrack
FATAL: Module nf_conntrack not found.

Finally, I think, I have to install state and conntrack modules, but cant install because yum search result does not include required packages.

[root@myserver ~]# yum search conntrack
Loaded plugins: fastestmirror
Determining fastest mirrors
epel/metalink                                                                                          | 5.2 kB     00:00     
 * base: sg2plmirror01.shr.prod.sin2.secureserver.net
 * epel: kartolo.sby.datautama.net.id
 * extras: sg2plmirror01.shr.prod.sin2.secureserver.net
base                                                                                                   | 3.7 kB     00:00     
base/primary_db                                                                                        | 4.4 MB     00:00     
epel                                                                                                   | 4.4 kB     00:00     
epel/primary_db                                                                                        | 6.1 MB     00:02     
extras                                                                                                 | 3.4 kB     00:00     
extras/primary_db                                                                                      |  18 kB     00:00     
updates                                                                                                | 3.4 kB     00:00     
updates/primary_db                                                                                     | 3.1 MB     00:02     
=================================================== N/S Matched: conntrack ===================================================
libnetfilter_conntrack.i686 : Netfilter conntrack userspace library
libnetfilter_conntrack.x86_64 : Netfilter conntrack userspace library
libnetfilter_conntrack-devel.i686 : Netfilter conntrack userspace library
libnetfilter_conntrack-devel.x86_64 : Netfilter conntrack userspace library

  Name and summary matches only, use "search all" for everything.

How can install these modules and use my iptables commands given at the top?

Solution

You are on a VPS, a container running on a Linux box and isolated from the host system. So you can't control the host's kernel.