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Unassigned IP protocol scanning

Question asked by Rob Tappenden on Dec 18, 2017
Latest reply on Dec 19, 2017 by Rob Tappenden

As part of weekly scan activity, I am seeing traffic on IP protocols 251 an 252 in additional to scans on the typical range of TCP and UDP ports but cannot find any documentation which explains why this is happening.

 

With these protocol numbers being part of the unassigned protocol range per IANA, could someone explain their purpose and whether they can be removed from the scanning range?

Protocol Numbers 

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