CentOS

Have a look at iptables default policy and check if there are firewall rules preventing connections through tun-interface.

Depending on your hardware there's a good chance to accomplish this task with WOL (wake on lan) instead of scripting around ssh. However, personally I would prefer ansible as an orchestration tool - in my opinion this is a neat solution no matter how large your system pool is. And it comes with tons...

This sounds like your /etc/openvpn/server directory is denied by selinux.

Check selinux context with If server directory shows no selinux context you can restore centos defaults with

Something like this:

IPMI can be used locally or remotely. When it comes to multiple servers you may want to combine it with an orchestration tool like ansible.

I haven't done something with IPMI lately. But as fas as I can remember you just need to configure its dedicated management LAN Port and browse onto it.

Most likely this is due to insufficient child processes configured in php-fpm settings. Check /etc/php-fpm/*.conf and check/tune pm.* values.

Network bridging:

https://access.redhat.com/documentation ... k_bridging
or:
https://access.redhat.com/documentation ... sing_a_gui

Didn't read it word by word but this tutorial should be fine: https://linuxtechlab.com/turning-centosrhel-6-7-machine-router/ In your case the mentioned "WAN IP address" is the NIC connected with your router. This means it must have an address within the subnet of your routers IP range. The "interna...

Have a look at Redhat Bugzilla, as this might be a known bug: https://bugzilla.redhat.com/show_bug.cgi?id=1467910