User Guide

Table Of Contents
Security planning Planning considerations
2-56
pmp-0047 (December 2012)
Figure 26 Categorical protocol filtering
BootP
Client
BootP
Server
SNMP
IPv4
Multica
st
User
Defined
Port 1
SMB
User
Defined
Port 3
User
Defined
Port 2
PPPoE
ARP
All
Others
All
Other
IPv4
The following are example situations in which you can configure protocol filtering where NAT is disabled:
If you block a subscriber from only PPoE and SNMP, then the subscriber retains access to all other protocols
and all ports.
If you block PPoE, IPv4, and Uplink Broadcast, and you also check the
All others selection, then only Address Resolution Protocol is not filtered.