Adtran 4110 用户手册

Chapter 3.  Terminal Menu Operation and Structure

61200176L3-1

Express 4110/4120 User Manual

3-55

Write security: 2; Read security: 5

The packets which come out  toward the WAN from the Express 4110/
4120 can be filtered in three ways:

Write security: 2; Read security: 5

This is a list of up to 32 filter entries.  The setup is exactly the same as the 
Filter/In Exceptions 

list.

Write security: 2; Read security: 5

The demand dial filters have two purposes: 1) cause the Express 4110/
4120 in Bridge mode to dial this Connection List profile, and 2) determine 
which traffic will cause the idle timer to be reset, keeping the connection 
active.  The latter is used in Bridge or IP/IPX Router mode.  The idle 
timer is a timer in the Express 4110/4120 which continually increments 
until it reaches the idle time-out parameters value set in the Connection 
List, at which point the connection is hung-up.

When this filter is enabled, direct control can be placed over which pack-
ets are considered as demand and which are ignored.  Packets that are 
ignored cause a connection not to be dialed and do not reset the idle 
timer of an active connection.  This is especially helpful for bridged con-
nections since bridges cannot easily distinguish true demand traffic from 

 (def) 

 Turns off packet output filtering. No outgoing 
packets are blocked.

 

 All outgoing packets to the WAN are blocked 
except as defined in the Filters/Out Excep-
tions 

list.

 

 All outgoing packets to the WAN are not blocked 
except as defined in the Filters/Out Excep-
tions

 list.