into IP Filter
Filter Active?
Apply SrcAddrMask
to Src Addr
Check Src
IP Addr
Matched
Apply DestAddrMask
to Dest Addr
Check Dest
IP Addr
Matched
IP Protocol
Matched
Check Src &
Dest Port
Matched
Action Matched
Drop
Drop Packet
Filter Configuration
Packet
No
Yes
Not Matched
Not Matched
Check
Not Matched
Not Matched
More?
Yes
No
Check Next Rule
Forward
Figure 8-9 Executing an IP Filter
Check Next Rule
Check Next Rule
Prestige 650H-17 ADSL Router
Action Not Matched
Drop
Forward
Accept Packet
8-11