- 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 3443: OpenView Network Node Manager WEB Server
Port 3443 is assigned by IANA to ov-nnm-websrv (OpenView Network Node Manager WEB Server).
3443
How ov-nnm-websrv works
WebA browser sends an HTTP request to port 3443 and the ov-nnm-websrv 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 3443 dangerous?
We have no specific security note for port 3443. Its risk depends on the program actually listening on it. General advice for web services:
IANA registry entries for port 3443
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| ov-nnm-websrv | 3443 | TCP, UDP | OpenView Network Node Manager WEB Server | - | 2002-03 |
// source: IANA service name and port number registry
Which program uses port 3443, and is it reachable?
Linux
sudo ss -ltnup 'sport = :3443' # process listening on 3443
sudo lsof -nP -i :3443macOS
sudo lsof -nP -i :3443
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3443 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 3443 netstat -ano | findstr :3443
From another machine
nmap -p 3443 -sV <host> sudo nmap -sU -p 3443 <host> nc -zv <host> 3443
Block it in the firewall
sudo ufw deny 3443/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 3443" -Direction Inbound -LocalPort 3443 -Protocol TCP -Action Block # Windows
What is port 3443 used for?
Port 3443 is assigned by IANA to ov-nnm-websrv (OpenView Network Node Manager WEB Server).
Is port 3443 TCP or UDP?
Port 3443 is registered for TCP and UDP.
Is it safe to open port 3443?
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 3443 is open?
On Linux run "ss -ltnup 'sport = :3443'", on macOS "lsof -nP -i :3443", and on Windows "netstat -ano | findstr :3443" to see the local process. From another machine, "nmap -p 3443 <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