- 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 2408: CloudFlare Railgun Web Acceleration Protocol
Port 2408 is assigned by IANA to railgun-webaccl (CloudFlare Railgun Web Acceleration Protocol).
2408
How railgun-webaccl works
WebA browser sends an HTTP request to port 2408 and the railgun-webaccl server sends the page back.
- Transport
- TCP
- 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 2408 dangerous?
We have no specific security note for port 2408. Its risk depends on the program actually listening on it. General advice for web services:
IANA registry entries for port 2408
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| railgun-webaccl | 2408 | TCP | CloudFlare Railgun Web Acceleration Protocol | - | 2012-03-09 |
| - | 2408 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 2408, and is it reachable?
Linux
sudo ss -ltnup 'sport = :2408' # process listening on 2408
sudo lsof -nP -i :2408macOS
sudo lsof -nP -i :2408
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2408 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 2408 netstat -ano | findstr :2408
From another machine
nmap -p 2408 -sV <host> nc -zv <host> 2408
Block it in the firewall
sudo ufw deny 2408/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 2408" -Direction Inbound -LocalPort 2408 -Protocol TCP -Action Block # Windows
What is port 2408 used for?
Port 2408 is assigned by IANA to railgun-webaccl (CloudFlare Railgun Web Acceleration Protocol).
Is port 2408 TCP or UDP?
Port 2408 is registered for TCP.
Is it safe to open port 2408?
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 2408 is open?
On Linux run "ss -ltnup 'sport = :2408'", on macOS "lsof -nP -i :2408", and on Windows "netstat -ano | findstr :2408" to see the local process. From another machine, "nmap -p 2408 <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