Port 4033SANavigator

SANavigator peer communications use TCP and UDP port 4033.

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

also known as SANavigator Peer Port

Technical Details

what runs on :4033

SANavigator is registered on port :4033 over tcp and udp to Robert J Chansler. 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 :4033

this machine

# linux
sudo ss -tulpn 'sport = :4033'

# macos / bsd
sudo lsof -nP -i :4033

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :4033

another host

nmap -sV -p T:4033 <host>
sudo nmap -sU -sV -p U:4033 <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 :4033

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 :4033 yet

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

Record

iana registry entry

port: :4033
service: SANavigator
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA lists TCP and UDP port 4033 as the SANavigator Peer Port. The assignment is registered to Robert J Chansler, but public implementation and deployment details are not documented here.
lookups: 0rank 993
added: 2026-09-05
updated: 2026-09-05
references: IANA service name registry — port 4033

Something wrong?

This record is maintained by the engineers who use port 4033. 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 2026-09-05.

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 :4033, by lookups.

port	service	proto	category	risk	views
:4096	Ascom Timeplex BRE	TCPUDP	Network Services	safe	16.5k
:3978	OpenTTD Master Server	TCPUDP	Gaming	caution	12.5k
:3999	Norman Scanning Service	TCPUDP	Security	caution	9.9k
:4069	Minger Email Verification	UDP	Email	caution	8.5k
:4007	PrintBuzzer Socket Server	TCP	Network Services	caution	8.2k
:4093	PxPlus Client Server	TCPUDP	Databases	caution	8.0k
:4001	Microsoft Ants	TCP	Gaming	caution	7.7k
:4089	OpenCORE Remote Control	TCPUDP	Remote Access	caution	7.4k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :4033SANavigator

Technical Details

Security Information

Related Ports

Port 4033SANavigator