Nokia IP60 User Manual page 282

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Disable relaxed The UDP length verification sanity check measures the UDP header length
UDP length and compares it to the UDP header length specified in the UDP header. If
verification the two values differ, the packet may be corrupted.
However, since different applications may measure UDP header length
differently, the IP60 appliance 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 IP60 appliance should relax the UDP length verification
sanity check or not, by selecting one of the following:
True. Disable relaxed UDP length verification. The IP60 appliance
will drop packets that fail the UDP length verification check.
False. Do not disable relaxed UDP length verification. The IP60
appliance will not drop packets that fail the UDP length
verification check. This is the default.
282 Nokia IP60 Security Appliance User Guide