firwalld on VPS without nf_conntrack kernel module

I'm running a VPS of a german provider and want to switch from Ubuntu to CentOS. There I tried to install firewalld (was not preinstalled), but it always fails with the error

ERROR: Failed to load nf_conntrack module: modprobe: ERROR: could not find module by name='nf_conntrack'
modprobe: ERROR: could not insert 'nf_conntrack': Function not implemented
modprobe: ERROR: Error running install command for nf_conntrack
modprobe: ERROR: could not insert 'nf_conntrack': Operation not permitted

Obviously the nf_conntrack kernel module was not found. Since this is a VPS, I cannot tinker with the kernel modules. On the support site of my provider I found a list of available kernel modules, for example:

ip_conntrack_netbios_ns
ipt_conntrack   
ip_conntrack   
ip_conntrack_ftp   
ip_conntrack_irc

Since nf_conntrack is not listed here, does that mean, that I cannot use firewalld? Is it possible to run it without this module?

I guess I could use iptables, if I wanted to (it seems to run correctly). But as I have more experience with firewalld, I would like to stick with it.

CentOS Linux release 7.7.1908 (Core)

uname -a: Linux xxxxxx.xxxxxxxx.xxx 3.10.0-042stab140.1 #1 SMP Thu Aug 15 13:32:22 MSK 2019 x86_64 x86_64 x86_64 GNU/Linux

Solution 1:

Try this one:

1.) mkdir /lib/modules/$(uname -r)

2.) touch /lib/modules/$(uname -r)/modules.{builtin,order}

3.) for i in /sys/module/*; do echo kernel/${i##**/}.ko; done >> /lib/modules/$(uname -r)/modules.builtin

4.) depmod -a