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// Other services

Port 6501: BoKS Servc

Port 6501 is assigned by IANA to boks_servc (BoKS Servc), boks-servc (BoKS Servc IANA assigned this well-formed service name as a replacement for "boks_servc".).

6501

How boks_servc works

Other services
client:6501boks_servcresponse client:6501boks_servcresponse

The client sends a request to port 6501 and the boks_servc service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 6501 dangerous?

We have no specific security note for port 6501. 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 6501

ServicePortTransportDescriptionReferenceUpdated
boks_servc 6501 TCP, UDP BoKS Servc
Reported: Known Unauthorized Use on port 6501
 - -
boks-servc 6501 TCP, UDP BoKS Servc IANA assigned this well-formed service name as a replacement for "boks_servc".
Reported: Known Unauthorized Use on port 6501
 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 6501, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6501'      # process listening on 6501
sudo lsof -nP -i :6501

macOS

sudo lsof -nP -i :6501

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6501 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6501
netstat -ano | findstr :6501

From another machine

nmap -p 6501 -sV <host>
sudo nmap -sU -p 6501 <host>
nc -zv <host> 6501

Block it in the firewall

sudo ufw deny 6501/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6501" -Direction Inbound -LocalPort 6501 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6501 used for?

Port 6501 is assigned by IANA to boks_servc (BoKS Servc), boks-servc (BoKS Servc IANA assigned this well-formed service name as a replacement for "boks_servc".).

Is port 6501 TCP or UDP?

Port 6501 is registered for TCP and UDP.

Is it safe to open port 6501?

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 6501 is open?

On Linux run "ss -ltnup 'sport = :6501'", on macOS "lsof -nP -i :6501", and on Windows "netstat -ano | findstr :6501" to see the local process. From another machine, "nmap -p 6501 <host>" shows whether it is reachable.

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