Port 2812ATM over TCP (atmtcp)

An IANA-registered service name for ATM-over-TCP traffic on port 2812.

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

Technical Details

what runs on :2812

The registry assigns this service on both TCP and UDP, although Linux ATM implementations commonly use a TCP session to connect virtual ATM interfaces. The connection carries ATM-over-IP control and virtual-circuit data, including ATM circuit identifiers and payloads, using implementation-specific framing rather than a general-purpose application protocol. It is not an encrypted protocol and is unrelated to ordinary web, management, or database traffic.

Security Information

exposure of :2812

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 2.7 across 1,451 ports — this one sits 0.7 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

ATM-over-TCP has little normal Internet exposure, but an exposed listener could permit unauthorized peer connections, traffic injection, or resource-exhaustion attacks depending on the implementation. It should normally be restricted to trusted hosts or carried inside a protected management network or VPN; the protocol does not provide encryption by default.

Record

iana registry entry

port: :2812
service: ATM over TCP (atmtcp)
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services
usage: This port is associated with ATM-over-TCP implementations, particularly the Linux ATM virtual driver and related testing tools. Engineers are most likely to encounter it on legacy ATM systems, lab hosts, or network emulation setups rather than on ordinary production servers.
lookups: 0rank 993
added: 2026-09-12
updated: 2026-09-22
references: IANA service name registry — port 2812

Something wrong?

This record is maintained by the engineers who use port 2812. 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 2026-09-22.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

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all 1,451 in network services →

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:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
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:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :2812ATM over TCP (atmtcp)

Technical Details

Security Information

Related Ports

Port 2812ATM over TCP (atmtcp)