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// Other services

Port 10443: CirrosSP Workstation Communication

Port 10443 is assigned by IANA to cirrossp (CirrosSP Workstation Communication).

10443

How cirrossp works

Other services
client:10443cirrosspresponse client:10443cirrosspresponse

The client sends a request to port 10443 and the cirrossp service answers.

Transport
TCP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 10443 dangerous?

We have no specific security note for port 10443. 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 10443

ServicePortTransportDescriptionReferenceUpdated
cirrossp 10443 TCP CirrosSP Workstation Communication - 2020-02-12
-10443-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 10443, and is it reachable?

Linux

sudo ss -ltnup 'sport = :10443'      # process listening on 10443
sudo lsof -nP -i :10443

macOS

sudo lsof -nP -i :10443

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 10443 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 10443
netstat -ano | findstr :10443

From another machine

nmap -p 10443 -sV <host>
nc -zv <host> 10443

Block it in the firewall

sudo ufw deny 10443/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 10443" -Direction Inbound -LocalPort 10443 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 10443 used for?

Port 10443 is assigned by IANA to cirrossp (CirrosSP Workstation Communication).

Is port 10443 TCP or UDP?

Port 10443 is registered for TCP.

Is it safe to open port 10443?

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 10443 is open?

On Linux run "ss -ltnup 'sport = :10443'", on macOS "lsof -nP -i :10443", and on Windows "netstat -ano | findstr :10443" to see the local process. From another machine, "nmap -p 10443 <host>" shows whether it is reachable.

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