- 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 1673: Intel Proshare Multicast
Port 1673 is assigned by IANA to proshare-mc-1 (Intel Proshare Multicast).
1673
How proshare-mc-1 works
Other servicesThe client sends a request to port 1673 and the proshare-mc-1 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
Is port 1673 dangerous?
We have no specific security note for port 1673. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 1673
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| proshare-mc-1 | 1673 | TCP, UDP | Intel Proshare Multicast | - | - |
// source: IANA service name and port number registry
Which program uses port 1673, and is it reachable?
Linux
sudo ss -ltnup 'sport = :1673' # process listening on 1673
sudo lsof -nP -i :1673macOS
sudo lsof -nP -i :1673
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1673 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 1673 netstat -ano | findstr :1673
From another machine
nmap -p 1673 -sV <host> sudo nmap -sU -p 1673 <host> nc -zv <host> 1673
Block it in the firewall
sudo ufw deny 1673/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 1673" -Direction Inbound -LocalPort 1673 -Protocol TCP -Action Block # Windows
What is port 1673 used for?
Port 1673 is assigned by IANA to proshare-mc-1 (Intel Proshare Multicast).
Is port 1673 TCP or UDP?
Port 1673 is registered for TCP and UDP.
Is it safe to open port 1673?
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 1673 is open?
On Linux run "ss -ltnup 'sport = :1673'", on macOS "lsof -nP -i :1673", and on Windows "netstat -ano | findstr :1673" to see the local process. From another machine, "nmap -p 1673 <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