- Close the port if nothing on the host needs it.
- Identify the process that listens on it (commands below) before opening it in a firewall.
- Expose a service only to the networks that use it.
Port 3978: Secured Configuration Server
Port 3978 is assigned by IANA to secure-cfg-svr (Secured Configuration Server).
3978
How secure-cfg-svr works
Other servicesThe client sends a request to port 3978 and the secure-cfg-svr service answers.
- 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
- Other services
Is port 3978 dangerous?
We have no specific security note for port 3978. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 3978
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| secure-cfg-svr | 3978 | TCP, UDP | Secured Configuration Server | - | 2006-06 |
// source: IANA service name and port number registry
Which program uses port 3978, and is it reachable?
Linux
sudo ss -ltnup 'sport = :3978' # process listening on 3978
sudo lsof -nP -i :3978macOS
sudo lsof -nP -i :3978
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3978 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 3978 netstat -ano | findstr :3978
From another machine
nmap -p 3978 -sV <host> sudo nmap -sU -p 3978 <host> nc -zv <host> 3978
Block it in the firewall
sudo ufw deny 3978/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 3978" -Direction Inbound -LocalPort 3978 -Protocol TCP -Action Block # Windows
What is port 3978 used for?
Port 3978 is assigned by IANA to secure-cfg-svr (Secured Configuration Server).
Is port 3978 TCP or UDP?
Port 3978 is registered for TCP and UDP.
Is it safe to open port 3978?
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. Close the port if nothing on the host needs it.
How do I check if port 3978 is open?
On Linux run "ss -ltnup 'sport = :3978'", on macOS "lsof -nP -i :3978", and on Windows "netstat -ano | findstr :3978" to see the local process. From another machine, "nmap -p 3978 <host>" shows whether it is reachable.
Other other services ports
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