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// Other services

Port 667: campaign contribution disclosures - SDR Technologies

Port 667 is assigned by IANA to disclose (campaign contribution disclosures - SDR Technologies).

667

How disclose works

Other services
client:667discloseresponse client:667discloseresponse

The client sends a request to port 667 and the disclose 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 667 dangerous?

We have no specific security note for port 667. 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 667

ServicePortTransportDescriptionReferenceUpdated
disclose 667 TCP, UDP campaign contribution disclosures - SDR Technologies - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 667, and is it reachable?

Linux

sudo ss -ltnup 'sport = :667'      # process listening on 667
sudo lsof -nP -i :667

macOS

sudo lsof -nP -i :667

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 667 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 667
netstat -ano | findstr :667

From another machine

nmap -p 667 -sV <host>
sudo nmap -sU -p 667 <host>
nc -zv <host> 667

Block it in the firewall

sudo ufw deny 667/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 667" -Direction Inbound -LocalPort 667 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 667 used for?

Port 667 is assigned by IANA to disclose (campaign contribution disclosures - SDR Technologies).

Is port 667 TCP or UDP?

Port 667 is registered for TCP and UDP.

Is it safe to open port 667?

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 667 is open?

On Linux run "ss -ltnup 'sport = :667'", on macOS "lsof -nP -i :667", and on Windows "netstat -ano | findstr :667" to see the local process. From another machine, "nmap -p 667 <host>" shows whether it is reachable.

05 Related
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