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For SNMPv3 SHA2 Support replace https://dl-nmis.opmantek.com/nmis9/jira/Net_SNMP_Security_USM_v4_0_1_patch/USM.pm with https://githubraw.githubusercontent.com/Napsty/scripts/blob/master/perl-net-snmp-sha2/USM.pm
This is an updated USM.pm module for sha224, sha256, sha384, and sha512. Also includes AES256 support.
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