Port 2106Multicast Scope Zone Announcement Protocol

MZAP announces and discovers administratively scoped multicast zones on multicast-enabled networks.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

also known as mzap

Technical Details

what runs on :2106

MZAP is a multicast control protocol for exchanging zone-announcement and discovery information. The IANA registry assigns port 2106 for both UDP and TCP, although MZAP deployments are primarily associated with connectionless multicast control traffic. Messages describe multicast scope-zone information rather than carrying application payloads; it is related to administratively scoped multicast operation and multicast routing infrastructure.

Security Information

exposure of :2106

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

network services averages 2.7 across 1,265 ports — this one sits 1.7 below.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

MZAP is infrastructure signaling rather than an end-user service and is not encrypted by default. It should generally be limited to the multicast-routing domain where it is required; exposing it broadly could allow false zone information or unnecessary multicast-control traffic, but the protocol is rarely deployed on internet-facing systems.

Record

iana registry entry

port: :2106
service: Multicast Scope Zone Announcement Protocol
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Network Services
usage: MZAP is used by multicast infrastructure to announce and discover administratively scoped multicast zones and their boundaries. It is uncommon outside networks deploying scoped IP multicast and is not normally encountered on general-purpose internet hosts.
lookups: 0rank 994
added: 2026-09-20
updated: 2026-09-20
references: IANA service name registry — port 2106

Something wrong?

This record is maintained by the engineers who use port 2106. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-09-20.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :2106Multicast Scope Zone Announcement Protocol

Technical Details

Security Information

Related Ports

Port 2106Multicast Scope Zone Announcement Protocol