What is the difference between the internal IP and the real IP from my ISP?
Internal IPs is sometimes referred to as virtual IPs. They are a group of up to 255 IPs that are used and recognized internally on the local area network. They are not intended to be recognized on the Internet. The real IP from ISP, instead, can be recognized or pinged by another real IP on the internet. The ZyWALL Internet Access Sharing Router works like an intelligent router that route between the virtual IP and the real IP.
