CyberHunter
Local dataset, no network
// Other services

Port 627: PassGo Tivoli

Port 627 is assigned by IANA to passgo-tivoli (PassGo Tivoli).

627

How passgo-tivoli works

Other services
client:627passgo-tivoliresponse client:627passgo-tivoliresponse

The client sends a request to port 627 and the passgo-tivoli 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 627 dangerous?

We have no specific security note for port 627. 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 627

ServicePortTransportDescriptionReferenceUpdated
passgo-tivoli 627 TCP, UDP PassGo Tivoli - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 627, and is it reachable?

Linux

sudo ss -ltnup 'sport = :627'      # process listening on 627
sudo lsof -nP -i :627

macOS

sudo lsof -nP -i :627

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 627 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 627
netstat -ano | findstr :627

From another machine

nmap -p 627 -sV <host>
sudo nmap -sU -p 627 <host>
nc -zv <host> 627

Block it in the firewall

sudo ufw deny 627/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 627" -Direction Inbound -LocalPort 627 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 627 used for?

Port 627 is assigned by IANA to passgo-tivoli (PassGo Tivoli).

Is port 627 TCP or UDP?

Port 627 is registered for TCP and UDP.

Is it safe to open port 627?

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 627 is open?

On Linux run "ss -ltnup 'sport = :627'", on macOS "lsof -nP -i :627", and on Windows "netstat -ano | findstr :627" to see the local process. From another machine, "nmap -p 627 <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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