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// Other services

Port 2563: CTI Redwood

Port 2563 is assigned by IANA to cti-redwood (CTI Redwood).

2563

How cti-redwood works

Other services
client:2563cti-redwoodresponse client:2563cti-redwoodresponse

The client sends a request to port 2563 and the cti-redwood 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
Registered (1024-49151)
Category
Other services
01 Security

Is port 2563 dangerous?

We have no specific security note for port 2563. 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 2563

ServicePortTransportDescriptionReferenceUpdated
cti-redwood 2563 TCP, UDP CTI Redwood - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2563, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2563'      # process listening on 2563
sudo lsof -nP -i :2563

macOS

sudo lsof -nP -i :2563

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2563 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2563
netstat -ano | findstr :2563

From another machine

nmap -p 2563 -sV <host>
sudo nmap -sU -p 2563 <host>
nc -zv <host> 2563

Block it in the firewall

sudo ufw deny 2563/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2563" -Direction Inbound -LocalPort 2563 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2563 used for?

Port 2563 is assigned by IANA to cti-redwood (CTI Redwood).

Is port 2563 TCP or UDP?

Port 2563 is registered for TCP and UDP.

Is it safe to open port 2563?

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 2563 is open?

On Linux run "ss -ltnup 'sport = :2563'", on macOS "lsof -nP -i :2563", and on Windows "netstat -ano | findstr :2563" to see the local process. From another machine, "nmap -p 2563 <host>" shows whether it is reachable.

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