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// Other services

Port 3105: Cardbox

Port 3105 is assigned by IANA to cardbox (Cardbox).

3105

How cardbox works

Other services
client:3105cardboxresponse client:3105cardboxresponse

The client sends a request to port 3105 and the cardbox 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 3105 dangerous?

We have no specific security note for port 3105. 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 3105

ServicePortTransportDescriptionReferenceUpdated
cardbox 3105 TCP, UDP Cardbox - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3105, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3105'      # process listening on 3105
sudo lsof -nP -i :3105

macOS

sudo lsof -nP -i :3105

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3105 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3105
netstat -ano | findstr :3105

From another machine

nmap -p 3105 -sV <host>
sudo nmap -sU -p 3105 <host>
nc -zv <host> 3105

Block it in the firewall

sudo ufw deny 3105/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3105" -Direction Inbound -LocalPort 3105 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3105 used for?

Port 3105 is assigned by IANA to cardbox (Cardbox).

Is port 3105 TCP or UDP?

Port 3105 is registered for TCP and UDP.

Is it safe to open port 3105?

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 3105 is open?

On Linux run "ss -ltnup 'sport = :3105'", on macOS "lsof -nP -i :3105", and on Windows "netstat -ano | findstr :3105" to see the local process. From another machine, "nmap -p 3105 <host>" shows whether it is reachable.

05 Related
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