This indicates attack attempt against a Security Bypass vulnerability in EMC Legato Networker.
The vulnerability is due to insufficient access control when handling portmap requests. Remote unauthenticated attackers can exploit the vulnerability by spoofing a source address as "localhost" or "127.0.0.1" to register Remote Procedure Call (RPC) services, allowing them to eavesdrop on communications.
EMC Legato NetWorker 7.5 prior to 184.108.40.206
EMC Legato NetWorker 7.6 prior to 220.127.116.11
Security Bypass: Remote attackers can bypass the security of vulnerable systems.
Refer to the vendor's website for a suggested workaround.