CyberHunter
Local dataset, no network
// Other services

Port 3767: ListMGR Port

Port 3767 is assigned by IANA to listmgr-port (ListMGR Port).

3767

How listmgr-port works

Other services
client:3767listmgr-portresponse client:3767listmgr-portresponse

The client sends a request to port 3767 and the listmgr-port 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 3767 dangerous?

We have no specific security note for port 3767. 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 3767

ServicePortTransportDescriptionReferenceUpdated
listmgr-port 3767 TCP, UDP ListMGR Port - 2003-06

// source: IANA service name and port number registry

03 Check it

Which program uses port 3767, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3767'      # process listening on 3767
sudo lsof -nP -i :3767

macOS

sudo lsof -nP -i :3767

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3767 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3767
netstat -ano | findstr :3767

From another machine

nmap -p 3767 -sV <host>
sudo nmap -sU -p 3767 <host>
nc -zv <host> 3767

Block it in the firewall

sudo ufw deny 3767/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3767" -Direction Inbound -LocalPort 3767 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3767 used for?

Port 3767 is assigned by IANA to listmgr-port (ListMGR Port).

Is port 3767 TCP or UDP?

Port 3767 is registered for TCP and UDP.

Is it safe to open port 3767?

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 3767 is open?

On Linux run "ss -ltnup 'sport = :3767'", on macOS "lsof -nP -i :3767", and on Windows "netstat -ano | findstr :3767" to see the local process. From another machine, "nmap -p 3767 <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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