Not sure what you mean by "private network." The DHCP server should not be exposed to the internet, and there should not be a firewall between the DHCP server and the DHCP clients.

Firewalls, explained. A firewall is like a bouncer for your internet activity, creating a security barrier between your home network and unwanted intrusion from the internet at large.

Disconnected from the server issue can happen anytime during the game, and it can be a frustrating experience. This issue is usually caused by your internet service provider, network lag ...

on the assumption your quake server is using a non-routable ip (i.e. 172.16.x.x, 192.168.x.x, etc..):<BR>1) Create a NAT in the firewall so it has a valid IP that can be reached from the internet ...

“If a firewall disappears in the physical world, somebody’s going to notice.” Virtual firewalls will also require rethinking on the part of network and server teams within organizations.

The Windows Security Firewall and network protection area can be hidden from users of the PC. This can be useful if you don’t want them to see or have access to this area.