Figure 7-9 Executing An Ip Filter - ZyXEL Communications Prestige 310 User Manual

Prestige 310 Broadband Sharing Gateway
into IP Filter
Filter Active?
Apply SrcAddrMask
to Src Addr
Check Src
Apply DestAddrMask
to Dest Addr
Check Dest
IP Protocol
Check Src &
Dest Port
Action Matched
Drop
Drop Packet
7-10
Packet
Yes
Not Matched
IP Addr
Matched
Not Matched
IP Addr
Matched
Check
Not Matched
Matched
Not Matched
Matched
More? Yes
No
Check Next Rule
Forward

Figure 7-9 Executing an IP Filter

No
Check Next Rule
Check Next Rule
Action Not Matched
Drop Forward
Accept Packet
Filter Configuration