- 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 5248: CA Access Control Web Service
Port 5248 is assigned by IANA to caacws (CA Access Control Web Service).
5248
How caacws works
WebA browser sends an HTTP request to port 5248 and the caacws 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 5248 dangerous?
We have no specific security note for port 5248. Its risk depends on the program actually listening on it. General advice for web services:
IANA registry entries for port 5248
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| caacws | 5248 | TCP, UDP | CA Access Control Web Service | - | 2008-03-06 |
// source: IANA service name and port number registry
Which program uses port 5248, and is it reachable?
Linux
sudo ss -ltnup 'sport = :5248' # process listening on 5248
sudo lsof -nP -i :5248macOS
sudo lsof -nP -i :5248
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5248 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 5248 netstat -ano | findstr :5248
From another machine
nmap -p 5248 -sV <host> sudo nmap -sU -p 5248 <host> nc -zv <host> 5248
Block it in the firewall
sudo ufw deny 5248/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 5248" -Direction Inbound -LocalPort 5248 -Protocol TCP -Action Block # Windows
What is port 5248 used for?
Port 5248 is assigned by IANA to caacws (CA Access Control Web Service).
Is port 5248 TCP or UDP?
Port 5248 is registered for TCP and UDP.
Is it safe to open port 5248?
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 5248 is open?
On Linux run "ss -ltnup 'sport = :5248'", on macOS "lsof -nP -i :5248", and on Windows "netstat -ano | findstr :5248" to see the local process. From another machine, "nmap -p 5248 <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