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// Other services

Port 5245: DownTools Control Protocol

Port 5245 is assigned by IANA to downtools (DownTools Control Protocol), downtools-disc (DownTools Discovery Protocol).

5245

How downtools works

Other services
client:5245downtoolsresponse client:5245downtoolsresponse

The client sends a request to port 5245 and the downtools 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 5245 dangerous?

We have no specific security note for port 5245. 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 5245

ServicePortTransportDescriptionReferenceUpdated
downtools 5245 TCP DownTools Control Protocol - 2009-04-07
downtools-disc 5245 UDP DownTools Discovery Protocol - 2009-04-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 5245, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5245'      # process listening on 5245
sudo lsof -nP -i :5245

macOS

sudo lsof -nP -i :5245

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5245 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5245
netstat -ano | findstr :5245

From another machine

nmap -p 5245 -sV <host>
sudo nmap -sU -p 5245 <host>
nc -zv <host> 5245

Block it in the firewall

sudo ufw deny 5245/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5245" -Direction Inbound -LocalPort 5245 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5245 used for?

Port 5245 is assigned by IANA to downtools (DownTools Control Protocol), downtools-disc (DownTools Discovery Protocol).

Is port 5245 TCP or UDP?

Port 5245 is registered for TCP and UDP.

Is it safe to open port 5245?

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 5245 is open?

On Linux run "ss -ltnup 'sport = :5245'", on macOS "lsof -nP -i :5245", and on Windows "netstat -ano | findstr :5245" to see the local process. From another machine, "nmap -p 5245 <host>" shows whether it is reachable.

05 Related
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