User's Manual Part 3

Release8OperationsGuide
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Issue2,November2007 Draft5forRegula toryReview 383
22.5.2 ProtocolandPortFilteringwithNATDisabled
Where NAT is disabled, you can filter both protocols and the three user-defined ports.
Using the check boxes on the interface, you can either
• allow all protocols except those that you wish to block.
• block all protocols except those that you wish to allow.
You can allow or block any of the following protocols:
• PPPoE (Point to Point Protocol over Ethernet)
• Any or all of the following IPv4 (Internet Protocol version 4) protocols:
• SMB (Network Neighborhood)
• SNMP
• Up to 3 user-defined ports
• All other IPv4 traffic (see Figure 141)
• Uplink Broadcast
• ARP (Address Resolution Protocol)
• All others (see Figure 141)
PPPoE
ARP
All Other IPv4
User
Defined
Port 1
IPv4
Multicast
BootP
Server
BootP
Client
SNMP
SMB
User
Defined
Port 3
User
Defined
Port 2
All Others
Figure 141: Categorical protocol filtering