ZyXEL Communications ISG50 User Manual

ISG50 User’s Guide

HTTP redirect forwards the client’s HTTP request (except HTTP traffic destined for the ISG50) to a 
web proxy server. In the following example, proxy server A is connected to the DMZ interface. 
When a client connected to the LAN1 zone wants to open a web page, its HTTP request is 
redirected to proxy server A first. If proxy server A cannot find the web page in its cache, a policy 
route allows it to access the Internet to get them from a server. Proxy server A then forwards the 
response to the client. 

HTTP Redirect Example    

Use the HTTP Redirect screens (see 

) to display and edit the HTTP 

redirect rules.

A proxy server helps client devices make indirect requests to access the Internet or outside network 
resources/services. A proxy server can act as a firewall or an ALG (application layer gateway) 
between the private network and the Internet or other networks. It also keeps hackers from 
knowing internal IP addresses.