How to Provide Internet-connected Servers and Avoid Security Breach from Web Activities?
Network Address Translation (NAT) performs translation to the IP address of a host in a packet. The NAT feature allows computers on a private network behind the ZyWALL USG to be accessible form outside.
Placing servers behind a USG offering maximum network protection while allowing the WAN-side clients/servers to access intranet servers is common practice. A company may have an FTP server that needs to be accessible by remote workers over the Internet. To fulfill this requirement, the administrator can configure a NAT mapping rule to forward the traffic from the Internet to intranet.