V-18545
The SA will ensure a packet filter is implemented to filter the enclave traffic to and from printer VLANs to allow only print traffic.
Discussion
A firewall rule set can filter network traffic within the printer VLAN to only expected printer protocols. The SA managing the local enclave should identify the printer port traffic within the enclave. Ports commonly used by printers are typically tcp port 515, 631, 1782 and tcp ports 9100, 9101, 9102 but others are used throughout the industry. The SA can review RFC 1700 Port Assignments and review printer vendor documents for the filter rule-set.
Fix Text
Define the filter on the VLAN ACL or build a firewall ruleset to accomplish the requirment.
Check Content
ToAn verify compliance with this requirement, an ACL mustor befirewall configuredrule onset thecan L3filter switchnetwork VLANtraffic interfacewithin assigned for the printer VLAN, orto ononly theexpected firewall interface connecting to the printer VLANprotocols. Exception to this requirement is traffic from RSD sensors connected to the VLAN.
Note: The SA managing the local enclave should identify the printer port traffic within the enclave. Ports commonly used by printers are portstypically tcp port 515, 631, 1782, and tcp ports 9100, 9101, and9102 9102but others are used throughout the industry. The SA can review RFC 1700 Port Assignments and review printer vendor documents tofor determinethe whatfilter portsrule-set. shouldVerify bethe allowedfilter applied to the printer VLAN subnet.
Responsibility
Information Assurance Officer