Port 3081Transaction Language 1 (TL1-LV)

TL1-LV carries telecom equipment management commands and responses, typically on TCP.

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

also known as TL1

Technical Details

what runs on :3081

TL1 is an ASCII command-and-response management protocol: commands commonly use a semicolon terminator and a CTAG to correlate responses, while equipment can also report alarms and other events. The LV label denotes the length-value form, as distinct from the related tl1-raw service; implementation details can vary by equipment. IANA lists both TCP and UDP for port 3081, but TL1 sessions are typically carried over TCP, which provides the reliable byte stream the exchange expects.

Security Information

exposure of :3081

risk score

7/ 10risk

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

network services averages 2.7 across 1,354 ports — this one sits 4.3 above.

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

TL1 is a management interface, not a service that should normally be reachable from the public internet. Depending on the equipment, commands may expose sensitive status or change network-element configuration, and credentials or traffic may be sent without encryption; restrict access to trusted management networks and use vendor-supported secure access controls or tunneling.

Record

iana registry entry

port: :3081
service: Transaction Language 1 (TL1-LV)
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: Network Services
usage: TL1 is used to manage and monitor telecommunications network elements, such as transport and switching equipment. Engineers are most likely to encounter it on a restricted operator or equipment-management network, rather than on public-facing hosts.
lookups: 0rank 993
added: 2026-09-27
updated: 2026-09-27
references: IANA service name registry — port 3081

Something wrong?

This record is maintained by the engineers who use port 3081. 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 2026-09-27.

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edit this record →back to the registry

Related Ports

all 1,354 in network services →

the 8 most looked-up other ports in network services — 1,354 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:6543	Jetnet	UDP	Network Services	caution	65.3k
:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3233	WhiskerControl Protocol	TCPUDP	Network Services	caution	61.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :3081Transaction Language 1 (TL1-LV)

Technical Details

Security Information

Related Ports

Port 3081Transaction Language 1 (TL1-LV)