CyberHunter
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// Other services

Port 629: 3Com AMP3

Port 629 is assigned by IANA to 3com-amp3 (3Com AMP3).

629

How 3com-amp3 works

Other services
client:6293com-amp3response client:6293com-amp3response

The client sends a request to port 629 and the 3com-amp3 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 629 dangerous?

We have no specific security note for port 629. 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 629

ServicePortTransportDescriptionReferenceUpdated
3com-amp3 629 TCP, UDP 3Com AMP3 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 629, and is it reachable?

Linux

sudo ss -ltnup 'sport = :629'      # process listening on 629
sudo lsof -nP -i :629

macOS

sudo lsof -nP -i :629

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 629 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 629
netstat -ano | findstr :629

From another machine

nmap -p 629 -sV <host>
sudo nmap -sU -p 629 <host>
nc -zv <host> 629

Block it in the firewall

sudo ufw deny 629/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 629" -Direction Inbound -LocalPort 629 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 629 used for?

Port 629 is assigned by IANA to 3com-amp3 (3Com AMP3).

Is port 629 TCP or UDP?

Port 629 is registered for TCP and UDP.

Is it safe to open port 629?

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 629 is open?

On Linux run "ss -ltnup 'sport = :629'", on macOS "lsof -nP -i :629", and on Windows "netstat -ano | findstr :629" to see the local process. From another machine, "nmap -p 629 <host>" shows whether it is reachable.

05 Related
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