- 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 3986: MAPPER workstation server
Port 3986 is assigned by IANA to mapper-ws_ethd (MAPPER workstation server), mapper-ws-ethd (MAPPER workstation server IANA assigned this well-formed service name as a replacement for "mapper-ws_ethd".).
3986
How mapper-ws_ethd works
Other servicesThe client sends a request to port 3986 and the mapper-ws_ethd service answers.
- Transport
- TCP · UDP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned2 registered services
- Range
- Registered (1024-49151)
- Category
- Other services
Is port 3986 dangerous?
We have no specific security note for port 3986. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 3986
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| mapper-ws_ethd | 3986 | TCP, UDP | MAPPER workstation server | - | - |
| mapper-ws-ethd | 3986 | TCP, UDP | MAPPER workstation server IANA assigned this well-formed service name as a replacement for "mapper-ws_ethd". | - | - |
// source: IANA service name and port number registry
Which program uses port 3986, and is it reachable?
Linux
sudo ss -ltnup 'sport = :3986' # process listening on 3986
sudo lsof -nP -i :3986macOS
sudo lsof -nP -i :3986
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3986 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 3986 netstat -ano | findstr :3986
From another machine
nmap -p 3986 -sV <host> sudo nmap -sU -p 3986 <host> nc -zv <host> 3986
Block it in the firewall
sudo ufw deny 3986/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 3986" -Direction Inbound -LocalPort 3986 -Protocol TCP -Action Block # Windows
What is port 3986 used for?
Port 3986 is assigned by IANA to mapper-ws_ethd (MAPPER workstation server), mapper-ws-ethd (MAPPER workstation server IANA assigned this well-formed service name as a replacement for "mapper-ws_ethd".).
Is port 3986 TCP or UDP?
Port 3986 is registered for TCP and UDP.
Is it safe to open port 3986?
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 3986 is open?
On Linux run "ss -ltnup 'sport = :3986'", on macOS "lsof -nP -i :3986", and on Windows "netstat -ano | findstr :3986" to see the local process. From another machine, "nmap -p 3986 <host>" shows whether it is reachable.
Other other services ports
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp