DTLS
From Net-SNMP Wiki
DTLS stands for "Datagram Transport Layer Security" and is a method of sending TLS packets over datagram based protocols like UDP and SCTP. It is defined in rfc:4347. It uses X.509 certificates for authenticating both sides of the connection.
Net-SNMP 5.5 and above supports SNMP over DTLS. Instructions for using it can be found on the Using DTLS page.
Issues with using OpenSSL for supporting SNMP over DTLS within Net-SNMP can be found on the DTLS Implementation Notes page.
