Prestige 100L IDSL Router

Packet into IP Filter

Filter Active?

No

 

 

Yes

 

 

 

Apply SrcAddrMask

 

 

 

to Src Addr

 

 

 

Check Src

Not Matched

 

 

IP Addr

 

 

 

 

 

Matched

 

 

 

Apply DestAddrMask

 

 

to Dest Addr

 

 

 

Check Dest

Not Matched

 

 

IP Addr

 

 

 

 

 

Matched

 

 

 

Check

Not Matched

 

 

IP Protocol

 

 

 

 

 

Matched

 

 

 

Check Src &

Not Matched

 

 

Dest Port

 

 

 

 

 

Matched

 

 

 

More?

Yes

 

 

No

 

Action Not Matched

Action Matched

Check Next Rule

 

 

 

Check Next Rule

Drop

Forward

Drop

Forward

 

 

Drop Packet

Check Next Rule

 

Accept Packet

Figure 6-4 Executing an IP Filter

6-10

Filters

Page 69
Image 69
ZyXEL Communications Prestige 100L manual Executing an IP Filter