Port 2268Automatic Multicast Tunneling (AMT)

Automatic Multicast Tunneling carries IP multicast traffic across networks that provide only unicast connectivity.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as amt

Technical Details

what runs on :2268

AMT is specified by RFC 7450 as a gateway-to-relay tunneling protocol, normally using UDP port 2268. The exchange includes relay discovery, gateway requests, membership queries and updates, followed by encapsulated multicast data; the gateway presents multicast traffic locally while the relay forwards it across the unicast path. AMT carries control and data in protocol-specific UDP messages rather than using a separate application framing or encryption layer.

Security Information

exposure of :2268

risk score

2/ 10safe

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

network services averages 2.6 across 1,293 ports — this one sits 0.6 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

AMT is not encrypted by default, so tunneled multicast content and control messages can be observed or manipulated by an on-path attacker. Relays and gateways should restrict peers and validate traffic to reduce spoofing and denial-of-service or unwanted multicast forwarding; this obscure service is generally not intended to be broadly exposed to the public Internet.

Record

iana registry entry

port: :2268
service: Automatic Multicast Tunneling (AMT)
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services Streaming
usage: AMT gateways use this service to discover relays and tunnel multicast membership messages and multicast data across unicast networks. Engineers typically encounter it in multicast streaming or content-distribution deployments; standardized AMT operation uses UDP port 2268, although the registry assignment covers TCP and UDP.
lookups: 0rank 994
added: 2026-09-21
updated: 2026-09-21
references: IANA service name registry — port 2268
RFC 7450

Something wrong?

This record is maintained by the engineers who use port 2268. 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 2026-09-21.

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edit this record →back to the registry

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all 1,293 in network services →

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :2268Automatic Multicast Tunneling (AMT)

Technical Details

Security Information

Related Ports

Port 2268Automatic Multicast Tunneling (AMT)