CyberHunter
Local dataset, no network
// Other services

Port 4033: SANavigator Peer Port

Port 4033 is assigned by IANA to sanavigator (SANavigator Peer Port).

4033

How sanavigator works

Other services
client:4033sanavigatorresponse client:4033sanavigatorresponse

The client sends a request to port 4033 and the sanavigator service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 4033 dangerous?

We have no specific security note for port 4033. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 4033

ServicePortTransportDescriptionReferenceUpdated
sanavigator 4033 TCP, UDP SANavigator Peer Port - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4033, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4033'      # process listening on 4033
sudo lsof -nP -i :4033

macOS

sudo lsof -nP -i :4033

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4033 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4033
netstat -ano | findstr :4033

From another machine

nmap -p 4033 -sV <host>
sudo nmap -sU -p 4033 <host>
nc -zv <host> 4033

Block it in the firewall

sudo ufw deny 4033/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4033" -Direction Inbound -LocalPort 4033 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4033 used for?

Port 4033 is assigned by IANA to sanavigator (SANavigator Peer Port).

Is port 4033 TCP or UDP?

Port 4033 is registered for TCP and UDP.

Is it safe to open port 4033?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 4033 is open?

On Linux run "ss -ltnup 'sport = :4033'", on macOS "lsof -nP -i :4033", and on Windows "netstat -ano | findstr :4033" to see the local process. From another machine, "nmap -p 4033 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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