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// Other services

Port 1674: Intel Proshare Multicast

Port 1674 is assigned by IANA to proshare-mc-2 (Intel Proshare Multicast).

1674

How proshare-mc-2 works

Other services
client:1674proshare-mc-2response client:1674proshare-mc-2response

The client sends a request to port 1674 and the proshare-mc-2 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 1674 dangerous?

We have no specific security note for port 1674. 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 1674

ServicePortTransportDescriptionReferenceUpdated
proshare-mc-2 1674 TCP, UDP Intel Proshare Multicast - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1674, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1674'      # process listening on 1674
sudo lsof -nP -i :1674

macOS

sudo lsof -nP -i :1674

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1674 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1674
netstat -ano | findstr :1674

From another machine

nmap -p 1674 -sV <host>
sudo nmap -sU -p 1674 <host>
nc -zv <host> 1674

Block it in the firewall

sudo ufw deny 1674/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1674" -Direction Inbound -LocalPort 1674 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1674 used for?

Port 1674 is assigned by IANA to proshare-mc-2 (Intel Proshare Multicast).

Is port 1674 TCP or UDP?

Port 1674 is registered for TCP and UDP.

Is it safe to open port 1674?

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 1674 is open?

On Linux run "ss -ltnup 'sport = :1674'", on macOS "lsof -nP -i :1674", and on Windows "netstat -ano | findstr :1674" to see the local process. From another machine, "nmap -p 1674 <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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