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// Other services

Port 676: VPPS Via

Port 676 is assigned by IANA to vpps-via (VPPS Via).

676

How vpps-via works

Other services
client:676vpps-viaresponse client:676vpps-viaresponse

The client sends a request to port 676 and the vpps-via 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 676 dangerous?

We have no specific security note for port 676. 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 676

ServicePortTransportDescriptionReferenceUpdated
vpps-via 676 TCP, UDP VPPS Via - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 676, and is it reachable?

Linux

sudo ss -ltnup 'sport = :676'      # process listening on 676
sudo lsof -nP -i :676

macOS

sudo lsof -nP -i :676

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 676 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 676
netstat -ano | findstr :676

From another machine

nmap -p 676 -sV <host>
sudo nmap -sU -p 676 <host>
nc -zv <host> 676

Block it in the firewall

sudo ufw deny 676/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 676" -Direction Inbound -LocalPort 676 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 676 used for?

Port 676 is assigned by IANA to vpps-via (VPPS Via).

Is port 676 TCP or UDP?

Port 676 is registered for TCP and UDP.

Is it safe to open port 676?

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 676 is open?

On Linux run "ss -ltnup 'sport = :676'", on macOS "lsof -nP -i :676", and on Windows "netstat -ano | findstr :676" to see the local process. From another machine, "nmap -p 676 <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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