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// Other services

Port 4041: Rocketeer-Houston

Port 4041 is assigned by IANA to houston (Rocketeer-Houston).

4041

How houston works

Other services
client:4041houstonresponse client:4041houstonresponse

The client sends a request to port 4041 and the houston 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 4041 dangerous?

We have no specific security note for port 4041. 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 4041

ServicePortTransportDescriptionReferenceUpdated
houston 4041 TCP, UDP Rocketeer-Houston - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4041, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4041'      # process listening on 4041
sudo lsof -nP -i :4041

macOS

sudo lsof -nP -i :4041

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4041 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4041
netstat -ano | findstr :4041

From another machine

nmap -p 4041 -sV <host>
sudo nmap -sU -p 4041 <host>
nc -zv <host> 4041

Block it in the firewall

sudo ufw deny 4041/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4041" -Direction Inbound -LocalPort 4041 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4041 used for?

Port 4041 is assigned by IANA to houston (Rocketeer-Houston).

Is port 4041 TCP or UDP?

Port 4041 is registered for TCP and UDP.

Is it safe to open port 4041?

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 4041 is open?

On Linux run "ss -ltnup 'sport = :4041'", on macOS "lsof -nP -i :4041", and on Windows "netstat -ano | findstr :4041" to see the local process. From another machine, "nmap -p 4041 <host>" shows whether it is reachable.

05 Related
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