Should port 46 be open on my firewall?

Port 46 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 46 use?

Port 46 (MPM-SND) uses the TCP/UDP transport protocol and falls under the System & Infrastructure category.

:46 (TCP/UDP)

MPM-SND

Q: Is port 46 (MPM-SND) dangerous?

Port 46 is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose with standard security practices.

Low Risk

TCP/UDP — System & Infrastructure

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Port Overview

Port Number 46

Service Name MPM-SND

Transport Protocol TCP/UDP

Category System & Infrastructure

Security Risk Low

Port Range Well-Known (0-1023)

What is Port 46?

MPM (default send). The sending component of the Message Processing Module system used in legacy ARPANET messaging.

TCP/UDP System & Infrastructure

Security Considerations

Port 46 (MPM-SND) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.

Recommendation: Standard security practices apply. Keep software updated and monitor access.

MPM-SND

Port Overview

What is Port 46?

Security Considerations

Related Ports — System & Infrastructure

Related Terms