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// Other services

Port 696: RUSHD

Port 696 is assigned by IANA to rushd (RUSHD).

696

How rushd works

Other services
client:696rushdresponse client:696rushdresponse

The client sends a request to port 696 and the rushd 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 696 dangerous?

We have no specific security note for port 696. 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 696

ServicePortTransportDescriptionReferenceUpdated
rushd 696 TCP, UDP RUSHD - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 696, and is it reachable?

Linux

sudo ss -ltnup 'sport = :696'      # process listening on 696
sudo lsof -nP -i :696

macOS

sudo lsof -nP -i :696

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 696 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 696
netstat -ano | findstr :696

From another machine

nmap -p 696 -sV <host>
sudo nmap -sU -p 696 <host>
nc -zv <host> 696

Block it in the firewall

sudo ufw deny 696/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 696" -Direction Inbound -LocalPort 696 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 696 used for?

Port 696 is assigned by IANA to rushd (RUSHD).

Is port 696 TCP or UDP?

Port 696 is registered for TCP and UDP.

Is it safe to open port 696?

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 696 is open?

On Linux run "ss -ltnup 'sport = :696'", on macOS "lsof -nP -i :696", and on Windows "netstat -ano | findstr :696" to see the local process. From another machine, "nmap -p 696 <host>" shows whether it is reachable.

05 Related
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