Port 6251TL1 Raw over SSL/TLS

Port 6251 is assigned for raw TL1 traffic protected with SSL/TLS over TCP or UDP.

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

also known as tl1-raw-ssl, TL1 over SSL/TLS

Technical Details

what runs on :6251

no technical write-up for :6251 yet

the handshake, the implementations you meet in the wild, the flags that matter. we have the registry entry — the detail comes from the engineers who run it.

add technical details

Security Information

exposure of :6251

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 2.8 across 1,166 ports — this one sits 1.8 below.

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

no security notes recorded for :6251 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :6251
service: TL1 Raw over SSL/TLS
transport: TCPUDP
encryption: tls / encrypted
assignment: iana registered
risk: 1/10safe
category: Network Services
usage: This assignment identifies raw TL1 traffic carried over SSL/TLS on TCP and UDP port 6251. It was registered by Jim Humphreys in 2008; public deployment appears uncommon.
lookups: 0rank 994
added: 2026-09-14
updated: 2026-09-14
references: IANA service name registry — port 6251

Something wrong?

This record is maintained by the engineers who use port 6251. 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 2026-09-14.

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

Related Ports

all 1,166 in network services →

the 8 most looked-up other ports in network services — 1,166 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 :6251TL1 Raw over SSL/TLS

Technical Details

Security Information

Related Ports

Port 6251TL1 Raw over SSL/TLS