CyberHunter
Local dataset, no network
// Other services

Port 3945: EMCADS Server Port

Port 3945 is assigned by IANA to emcads (EMCADS Server Port).

3945

How emcads works

Other services
client:3945emcadsresponse client:3945emcadsresponse

The client sends a request to port 3945 and the emcads 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
01 Security

Is port 3945 dangerous?

We have no specific security note for port 3945. Its risk depends on the program actually listening on it. General advice for other services services:

  • 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.
02 Registry

IANA registry entries for port 3945

ServicePortTransportDescriptionReferenceUpdated
emcads 3945 TCP, UDP EMCADS Server Port - 2004-01

// source: IANA service name and port number registry

03 Check it

Which program uses port 3945, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3945'      # process listening on 3945
sudo lsof -nP -i :3945

macOS

sudo lsof -nP -i :3945

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3945 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3945
netstat -ano | findstr :3945

From another machine

nmap -p 3945 -sV <host>
sudo nmap -sU -p 3945 <host>
nc -zv <host> 3945

Block it in the firewall

sudo ufw deny 3945/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3945" -Direction Inbound -LocalPort 3945 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3945 used for?

Port 3945 is assigned by IANA to emcads (EMCADS Server Port).

Is port 3945 TCP or UDP?

Port 3945 is registered for TCP and UDP.

Is it safe to open port 3945?

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 3945 is open?

On Linux run "ss -ltnup 'sport = :3945'", on macOS "lsof -nP -i :3945", and on Windows "netstat -ano | findstr :3945" to see the local process. From another machine, "nmap -p 3945 <host>" shows whether it is reachable.

05 Related
: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

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