- 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 2403: TaskMaster 2000 Web
Port 2403 is assigned by IANA to taskmaster2000 (TaskMaster 2000 Web).
2403
How taskmaster2000 works
WebA browser sends an HTTP request to port 2403 and the taskmaster2000 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 2403 dangerous?
We have no specific security note for port 2403. Its risk depends on the program actually listening on it. General advice for web services:
IANA registry entries for port 2403
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| taskmaster2000 | 2403 | TCP, UDP | TaskMaster 2000 Web | - | - |
// source: IANA service name and port number registry
Which program uses port 2403, and is it reachable?
Linux
sudo ss -ltnup 'sport = :2403' # process listening on 2403
sudo lsof -nP -i :2403macOS
sudo lsof -nP -i :2403
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2403 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 2403 netstat -ano | findstr :2403
From another machine
nmap -p 2403 -sV <host> sudo nmap -sU -p 2403 <host> nc -zv <host> 2403
Block it in the firewall
sudo ufw deny 2403/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 2403" -Direction Inbound -LocalPort 2403 -Protocol TCP -Action Block # Windows
What is port 2403 used for?
Port 2403 is assigned by IANA to taskmaster2000 (TaskMaster 2000 Web).
Is port 2403 TCP or UDP?
Port 2403 is registered for TCP and UDP.
Is it safe to open port 2403?
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 2403 is open?
On Linux run "ss -ltnup 'sport = :2403'", on macOS "lsof -nP -i :2403", and on Windows "netstat -ano | findstr :2403" to see the local process. From another machine, "nmap -p 2403 <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