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// Web

Port 24680: TCC User HTTP Service

Port 24680 is assigned by IANA to tcc-http (TCC User HTTP Service).

24680

How tcc-http works

Web
browser:24680tcc-http browser:24680tcc-http

A browser sends an HTTP request to port 24680 and the tcc-http 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
01 Security

Is port 24680 dangerous?

We have no specific security note for port 24680. Its risk depends on the program actually listening on it. General advice for web services:

  • 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.
02 Registry

IANA registry entries for port 24680

ServicePortTransportDescriptionReferenceUpdated
tcc-http 24680 TCP, UDP TCC User HTTP Service - 2006-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 24680, and is it reachable?

Linux

sudo ss -ltnup 'sport = :24680'      # process listening on 24680
sudo lsof -nP -i :24680

macOS

sudo lsof -nP -i :24680

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 24680 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 24680
netstat -ano | findstr :24680

From another machine

nmap -p 24680 -sV <host>
sudo nmap -sU -p 24680 <host>
nc -zv <host> 24680

Block it in the firewall

sudo ufw deny 24680/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 24680" -Direction Inbound -LocalPort 24680 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 24680 used for?

Port 24680 is assigned by IANA to tcc-http (TCC User HTTP Service).

Is port 24680 TCP or UDP?

Port 24680 is registered for TCP and UDP.

Is it safe to open port 24680?

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 24680 is open?

On Linux run "ss -ltnup 'sport = :24680'", on macOS "lsof -nP -i :24680", and on Windows "netstat -ano | findstr :24680" to see the local process. From another machine, "nmap -p 24680 <host>" shows whether it is reachable.

05 Related
: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

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