Cambium PTP 450 series, User Manual

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Security planning PTP 450 User Guide
ptp-450 (July 2014)
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Alignment
Link Capacity Test
BHM Evaluation
OFDM Frame Calculator
BER Results
Alignment Tool
Link Status
DNS Test
Logs NAT Table
BHS Session
PPPoE Session Log
Accounts
Change User Password
Add User
Delete User
PDA Quick Status
Spectrum Results (PDA)
Information
BHM Evaluation
AIM
Copyright Copyright Notices
Logoff
Filtering protocols and ports
You can filter (block) specified protocols and ports from leaving the BHM and BHS and entering the network. This
protects the network from both intended and inadvertent packet loading or probing by network users. By keeping
the specified protocols or ports off the network, this feature also provides a level of protection to users from each
other.
Protocol and port filtering is set per BHM/BHS. Except for filtering of SNMP ports, filtering occurs as packets
leave the BHM/BHS. If an BHS is configured to filter SNMP, then SNMP packets are blocked from entering the
BHS and, thereby, from interacting with the SNMP portion of the protocol stack on the BHS.
Port Filtering with NAT Enabled
Where NAT is enabled on the BHS, you can filter only the three user-defined ports. The following are example
situations in which you can configure port filtering where NAT is enabled.

To block a subscriber from using FTP, you can filter Ports 20 and 21 (the FTP ports) for both the TCP and
UDP protocols.