Port 6252TL1 over SSH

A registered port for carrying telecom TL1 management sessions over SSH; it is uncommon in public scans.

transport: tcp · udp
in transit: encrypted
assignment: official
risk: 7/10
lookups: 0

also known as tl1-ssh, TL1

Technical Details

what runs on :6252

TL1 messages use a structured, text-based command and response format, commonly with messages terminated by a semicolon. For TL1 over SSH, SSH provides the encrypted session and authentication; the standard SSH transport is TCP, so the registry's UDP entry does not imply a standard SSH-over-UDP service. Port 6252 is the registered port here, distinct from SSH's commonly used TCP port 22.

Security Information

exposure of :6252

risk score

7/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

remote access averages 3.8 across 215 ports — this one sits 3.2 above.

in transit

encrypted

payloads are protected on the wire

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

A reachable listener may provide access to telecom equipment management, so treat it as a remote-administration interface: restrict it to trusted management networks and use strong SSH authentication and least-privilege accounts. SSH encrypts the session, but that does not make an exposed management service safe to publish on the internet.

Record

iana registry entry

port: :6252
service: TL1 over SSH
transport: TCPUDP
encryption: tls / encrypted
assignment: iana registered
risk: 7/10risk
category: Remote Access Network Services
usage: This assignment is for TL1, a text-based command and response protocol used to manage telecommunications network equipment, carried through SSH. Engineers are most likely to encounter it on telecom management systems or network elements, rather than as a common public-facing service.
lookups: 0rank 993
added: 2026-10-10
updated: 2026-10-10
references: IANA service name registry — port 6252

Something wrong?

This record is maintained by the engineers who use port 6252. 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 2026-10-10.

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Related Ports

all 215 in remote access →

the 8 most looked-up other ports in remote access — 215 ports carry that label.

port	service	proto	category	risk	views
:8000	Intel Remote Desktop / Alternate HTTP Port	TCP	Web Services	safe	84.3k
:8888	D2GS Admin Console	TCP	Remote Access	caution	83.7k
:8881	Atlasz Secure Server	TCP	Web Services	caution	67.6k
:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:8008	IBM HTTP Server Admin	TCP	Web Services	caution	58.3k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:23	Telnet	TCP	Remote Access	caution	34.8k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :6252TL1 over SSH

Technical Details

Security Information

Related Ports

Port 6252TL1 over SSH