to test a policy traffic , i need a software/website to simulate a traffic.
shall U advise me one to install on a client which will fit the watchguard policy ?
Generally, you'll use the program that is going to generate that traffic to test with. For the "WatchGuard policy," you can use the WatchGuard System Manager to generate the actual traffic.
Other tools can be used like telnet with a port specified, but for the actual traffic, the real application is generally best.
WatchGuard Customer Support
There is also Policy Checker which may be of help.