- 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 3766: SSL e-watch sitewatch server
Port 3766 is assigned by IANA to sitewatch-s (SSL e-watch sitewatch server).
3766
How sitewatch-s works
Other servicesThe client sends a request to port 3766 and the sitewatch-s service answers.
- 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
- Other services
Is port 3766 dangerous?
We have no specific security note for port 3766. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 3766
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| sitewatch-s | 3766 | TCP | SSL e-watch sitewatch server | - | 2014-05-13 |
| - | 3766 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 3766, and is it reachable?
Linux
sudo ss -ltnup 'sport = :3766' # process listening on 3766
sudo lsof -nP -i :3766macOS
sudo lsof -nP -i :3766
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3766 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 3766 netstat -ano | findstr :3766
From another machine
nmap -p 3766 -sV <host> nc -zv <host> 3766
Block it in the firewall
sudo ufw deny 3766/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 3766" -Direction Inbound -LocalPort 3766 -Protocol TCP -Action Block # Windows
What is port 3766 used for?
Port 3766 is assigned by IANA to sitewatch-s (SSL e-watch sitewatch server).
Is port 3766 TCP or UDP?
Port 3766 is registered for TCP.
Is it safe to open port 3766?
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 3766 is open?
On Linux run "ss -ltnup 'sport = :3766'", on macOS "lsof -nP -i :3766", and on Windows "netstat -ano | findstr :3766" to see the local process. From another machine, "nmap -p 3766 <host>" shows whether it is reachable.
Other other services ports
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