User guide

SmartDefense Categories
Chapter 11: Using SmartDefense 213
In this field… Do this…
Disable relaxed
UDP length
verification
The UDP length verification sanity check measures the UDP header length
and compares it to the UDP header length specified in the UDP header. If
the two values differ, the packet may be corrupted.
However, since different applications may measure UDP header length
differently, the ZoneAlarm router relaxes the UDP length verification sanity
check by default, performing the check but not dropping offending packets.
This is called relaxed UDP length verification.
Specify whether the ZoneAlarm router should relax the UDP length
verification sanity check or not, by selecting one of the following:
• True. Disable relaxed UDP length verification. The ZoneAlarm
router will drop packets that fail the UDP length verification
check.
• False. Do not disable relaxed UDP length verification. The
ZoneAlarm router will not drop packets that fail the UDP length
verification check. This is the default.