CyberHunter
Local dataset, no network
// Other services

Port 6508: BoKS Dir Server, Public Port

Port 6508 is assigned by IANA to bdir_pub (BoKS Dir Server, Public Port), bdir-pub (BoKS Dir Server, Public Port IANA assigned this well-formed service name as a replacement for "bdir_pub".).

6508

How bdir_pub works

Other services
client:6508bdir_pubresponse client:6508bdir_pubresponse

The client sends a request to port 6508 and the bdir_pub 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 6508 dangerous?

We have no specific security note for port 6508. 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 6508

ServicePortTransportDescriptionReferenceUpdated
bdir_pub 6508 TCP, UDP BoKS Dir Server, Public Port - -
bdir-pub 6508 TCP, UDP BoKS Dir Server, Public Port IANA assigned this well-formed service name as a replacement for "bdir_pub". - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 6508, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6508'      # process listening on 6508
sudo lsof -nP -i :6508

macOS

sudo lsof -nP -i :6508

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6508 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6508
netstat -ano | findstr :6508

From another machine

nmap -p 6508 -sV <host>
sudo nmap -sU -p 6508 <host>
nc -zv <host> 6508

Block it in the firewall

sudo ufw deny 6508/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6508" -Direction Inbound -LocalPort 6508 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6508 used for?

Port 6508 is assigned by IANA to bdir_pub (BoKS Dir Server, Public Port), bdir-pub (BoKS Dir Server, Public Port IANA assigned this well-formed service name as a replacement for "bdir_pub".).

Is port 6508 TCP or UDP?

Port 6508 is registered for TCP and UDP.

Is it safe to open port 6508?

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 6508 is open?

On Linux run "ss -ltnup 'sport = :6508'", on macOS "lsof -nP -i :6508", and on Windows "netstat -ano | findstr :6508" to see the local process. From another machine, "nmap -p 6508 <host>" shows whether it is reachable.

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