[CentOS] CentOS-8: firewalld not starting

Thu Dec 12 01:18:23 UTC 2019
Jonathan Billings <billings at negate.org>

On Dec 11, 2019, at 13:22, Adrian van Bloois <adrian at pa0rda.nl> wrote:
> Hello everyone,
> When I try to start firewalld in CentOS-8 it refuses with this in the
> /var/log/firewalld, any suggestions?
> 2019-12-11 19:11:25 WARNING: ipset not usable, disabling ipset usage in firewall.
> 2019-12-11 19:11:25 ERROR: No icmptypes found.
> 2019-12-11 19:11:25 ERROR: Failed to load nf_conntrack module: modprobe: ERROR: could not find module by name='nf_conntrack'
> modprobe: ERROR: could not insert 'nf_conntrack': Unknown symbol in module, or unknown parameter (see dmesg)
> modprobe: ERROR: Error running install command for nf_conntrack
> modprobe: ERROR: could not insert 'nf_conntrack': Operation not permitted
> 2019-12-11 19:11:25 ERROR: Raising SystemExit in run_server

Are you running CentOS 8 on a hosting provider that uses OpenVZ or similar container-like VPSs?  What does “uname -r” report?

I ask because it looks like your system can’t load the kernel modules required to set up a firewall. 

Jonathan Billings