This post will expand somewhat upon the firewall rules in my RHEL7-install blogpost. I'm trying to make an IPsec connection between two machines (CentOS6 & CentOS7) - I'll detail the IPsec in another post, but this covers adding the FirewallD rules on the CentOS7 box.
I did have quite a few of these commands in my RHEL7 post, but Blogger somehow...