DTLS

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 5.6 and above supports SNMP over DTLS (RFC5953). Net-NSMP 5.5 had experimental code that is incompatible with the full support in 5.6 as the RFC was being written at the time and was still changing. Instructions for using it can be found on the Using DTLS page and the tutorial for using it with the test server can be found at Using TLS.

Issues with using OpenSSL for supporting SNMP over DTLS within Net-SNMP can be found on the DTLS Implementation Notes page.