WatchGuard : ICMP Error Handling - 'pmtu-discovery'

Information

ICMP Error messages can be used as a means to compromise sytems and networks. Appropriate configuration and filtering of these messages should be used to reduce potential threats.

Solution

In the Web UI navigate to the 'System' - > 'Global Settings' - > 'Networking' section. Uncheck the box for 'Fragmentation req (PMTU)'.

See Also

https://www.sans.org/security-resources/idfaq/icmp_misuse.php

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7

Plugin: WatchGuard

Control ID: 744b62dda0d846168cfe450398713fa66c6a94300f9fb4724c8312457cfa1735