CyberHunter
Local dataset, no network
// Other services

Port 3752: Vigil-IP RemoteAgent

Port 3752 is assigned by IANA to vipremoteagent (Vigil-IP RemoteAgent).

3752

How vipremoteagent works

Other services
client:3752vipremoteagentresponse client:3752vipremoteagentresponse

The client sends a request to port 3752 and the vipremoteagent 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 3752 dangerous?

We have no specific security note for port 3752. 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 3752

ServicePortTransportDescriptionReferenceUpdated
vipremoteagent 3752 TCP, UDP Vigil-IP RemoteAgent - 2003-04

// source: IANA service name and port number registry

03 Check it

Which program uses port 3752, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3752'      # process listening on 3752
sudo lsof -nP -i :3752

macOS

sudo lsof -nP -i :3752

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3752 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3752
netstat -ano | findstr :3752

From another machine

nmap -p 3752 -sV <host>
sudo nmap -sU -p 3752 <host>
nc -zv <host> 3752

Block it in the firewall

sudo ufw deny 3752/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3752" -Direction Inbound -LocalPort 3752 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3752 used for?

Port 3752 is assigned by IANA to vipremoteagent (Vigil-IP RemoteAgent).

Is port 3752 TCP or UDP?

Port 3752 is registered for TCP and UDP.

Is it safe to open port 3752?

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 3752 is open?

On Linux run "ss -ltnup 'sport = :3752'", on macOS "lsof -nP -i :3752", and on Windows "netstat -ano | findstr :3752" to see the local process. From another machine, "nmap -p 3752 <host>" shows whether it is reachable.

05 Related
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