As we know with many services that have to be installed on CentOS, we have to make sure that the plumbing is correct before we start. The plumbing, in the case of the Puppet master, means:
I've detailed these in the following sections.
I am not using a host-based firewall in the demonstration machine. This may not be the case on your systems, and if you are using a firewall, you will need to allow TCP port 8140 through the INPUT chain. The status of the firewall can be checked with the following command:
# iptables -L
This will list the rules that are in place and the default policy. If there are no rules in place and the default policy is ACCEPT, then you will not have firewall-related issues, and you can relax.