P100IH ISDN Router
Packet |
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into IP Filter |
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Filter Active? | N o |
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Yes |
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Apply SrcAddrMask |
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to Src Addr |
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Check Src | Not Matched |
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IP Addr |
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Matched |
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Apply DestAddrMask |
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to Dest Addr |
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Check Dest | Not Matched |
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IP Addr |
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Matched |
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Check | Not Matched |
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IP Protocol |
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Matched |
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Check Src & | Not Matched |
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Dest Port |
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Matched |
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More? | Yes |
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N o |
| Action Not Matched | |
Action Matched | Check Next Rule | Check Next Rule |
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| Drop | Forward | |
Drop | Forward |
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Drop Packet | Check Next Rule | Accept Packet |
Figure 9-8 Executing an IP Filter
Filter Configuration |
