- Serve it over HTTPS only and check the HTTP security headers.
- Keep admin consoles and development servers off the Internet.
- Patch the application server and remove default credentials and sample apps.
Port 3941: Home Portal Web Server
Port 3941 is assigned by IANA to homeportal-web (Home Portal Web Server).
3941
How homeportal-web works
WebA browser sends an HTTP request to port 3941 and the homeportal-web server sends the page back.
- 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
- Web
Is port 3941 dangerous?
We have no specific security note for port 3941. Its risk depends on the program actually listening on it. General advice for web services:
IANA registry entries for port 3941
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| homeportal-web | 3941 | TCP, UDP | Home Portal Web Server | - | 2003-11 |
// source: IANA service name and port number registry
Which program uses port 3941, and is it reachable?
Linux
sudo ss -ltnup 'sport = :3941' # process listening on 3941
sudo lsof -nP -i :3941macOS
sudo lsof -nP -i :3941
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3941 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 3941 netstat -ano | findstr :3941
From another machine
nmap -p 3941 -sV <host> sudo nmap -sU -p 3941 <host> nc -zv <host> 3941
Block it in the firewall
sudo ufw deny 3941/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 3941" -Direction Inbound -LocalPort 3941 -Protocol TCP -Action Block # Windows
What is port 3941 used for?
Port 3941 is assigned by IANA to homeportal-web (Home Portal Web Server).
Is port 3941 TCP or UDP?
Port 3941 is registered for TCP and UDP.
Is it safe to open port 3941?
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. Serve it over HTTPS only and check the HTTP security headers.
How do I check if port 3941 is open?
On Linux run "ss -ltnup 'sport = :3941'", on macOS "lsof -nP -i :3941", and on Windows "netstat -ano | findstr :3941" to see the local process. From another machine, "nmap -p 3941 <host>" shows whether it is reachable.
Other web ports
:443 HTTPS tcp · udp · sctp · low risk :80 HTTP tcp · udp · sctp · moderate risk :8080 HTTP alternate tcp · udp · high risk :8443 HTTPS alternate tcp · udp · moderate risk :3000 Dev servers / Grafana tcp · udp · moderate risk :5000 Flask / Docker registry / UPnP tcp · udp · moderate risk :8000 HTTP alternate (dev) tcp · udp · moderate risk :8888 Jupyter / HTTP alternate tcp · udp · high risk