Справочник Пользователя для RCA THOMSON SpeedTouchTM (Wireless) Business DSL Router

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Chapter 7
Scenario 1: Residential user.
E-NIT-CTC-20041213-0013 v0.5
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Expressions
We will now have a look at the http expression. Go to the expression page and select 
the Service tab.
Expert mode -> IP Router -> Expressions
This will show you a list of service expressions defined by default.
When we click on the + next to the HTTP expression name we can see the 
definitions used for this expression.
Here we can see that the expression http is used for packets :
of the type TCP (proto=6) with destination port 80.
Again at the bottom of the page you can see the actual protocol instead of the 
number.
If desired you can have a look at all the different expressions used for interactive 
traffic. We will not discuss all the expressions here as the configuration principle is 
the same for all of them. They all define a protocol and a port used by the service.