Port 5633BE Operations Request Listener

A TCP/UDP listener assigned for BE Operations requests.

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

also known as beorl

Technical Details

what runs on :5633

BE Operations Request Listener is registered on port :5633 over tcp and udp to Chirag Desai, assigned February 2006. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :5633

this machine

# linux
sudo ss -tulpn 'sport = :5633'

# macos / bsd
sudo lsof -nP -i :5633

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :5633

another host

nmap -sV -p T:5633 <host>
sudo nmap -sU -sV -p U:5633 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :5633

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 :5633 yet

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

Record

iana registry entry

port: :5633
service: BE Operations Request Listener
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns this service to the BE Operations Request Listener on TCP and UDP port 5633. The assignment is registered to Chirag Desai, but no public product or deployment details are identified.
lookups: 0rank 993
added: 2026-08-30
updated: 2026-08-30
references: IANA service name registry — port 5633

Something wrong?

This record is maintained by the engineers who use port 5633. 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 2026-08-30.

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 :5633, by lookups.

port	service	proto	category	risk	views
:5678	Mikrotik MNDP	UDP	Network Services	caution	24.7k
:5666	NRPE	TCP	Network Services	caution	13.6k
:5632	pcAnywhere Status	UDP	Security	caution	13.4k
:5631	Symantec pcAnywhere	TCP	Security	caution	10.3k
:5667	NSCA	TCP	Network Services	caution	8.6k
:5656	IBM Sametime P2P	TCP	File Transfer	safe	8.5k
:5591	Tidal Scheduler Master	TCP	System	caution	6.9k
:5629	Symantec Storage Foundation for Database	TCPUDP	Databases	safe	0

risk mix of the 8 listed

safe25%
caution75%

0 of 8 encrypted

Port :5633BE Operations Request Listener

Technical Details

Security Information

Related Ports

Port 5633BE Operations Request Listener