I'm on a red hat 7 machine, and I need to open all ports to a specific IP on the firewall. 

I tried this command:

```
firewall-cmd --permanent --zone=public --add-rich-rule='   rule family="ipv4"   source address="64.39.96.0/20"   port protocol="tcp" port="*" accept'

```

But I'm getting an invalid port error for the \*

Does anyone know and can tell me how to do this correctly?