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