Port 1804ENL

ENL is an obscure service assigned to TCP and UDP port 1804 and registered to Brian Olson.

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

Technical Details

what runs on :1804

no technical write-up for :1804 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 :1804

risk score

1/ 10safe

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

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

no security notes recorded for :1804 yet

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

Record

iana registry entry

port: :1804
service: ENL
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The IANA registry assigns the ENL service name to TCP and UDP port 1804. The assignment is registered to Brian Olson, but no product, protocol purpose, or deployment context is recorded.
lookups: 0rank 994
added: 2026-08-21
updated: 2026-08-21
references: IANA service name registry — port 1804

Something wrong?

This record is maintained by the engineers who use port 1804. 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 2026-08-21.

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

browse categories →

ports registered around :1804, by lookups.

port	service	proto	category	risk	views
:1863	Microsoft Notification Protocol	TCP	Voice and Chat	caution	15.9k
:1755	Microsoft Media Services	TCPUDP	Streaming	caution	13.8k
:1812	RADIUS Auth Protocol	TCPUDP	Security	caution	12.0k
:1801	MSMQ	TCPUDP	Network Services	caution	8.9k
:1813	RADIUS Accounting	TCPUDP	Security	caution	7.2k
:1762	CFT File Transfer	TCPUDP	File Transfer	caution	5.6k
:1761	Zenworks Remote Control	TCP	Remote Access	caution	5.6k
:1761	CFT 0	UDP	Network Services	caution	5.0k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :1804ENL

Technical Details

Security Information

Related Ports

Port 1804ENL