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// Other services

Port 3490: Colubris Management Port

Port 3490 is assigned by IANA to colubris (Colubris Management Port).

3490

How colubris works

Other services
client:3490colubrisresponse client:3490colubrisresponse

The client sends a request to port 3490 and the colubris 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 3490 dangerous?

We have no specific security note for port 3490. 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 3490

ServicePortTransportDescriptionReferenceUpdated
colubris 3490 TCP, UDP Colubris Management Port - 2002-05

// source: IANA service name and port number registry

03 Check it

Which program uses port 3490, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3490'      # process listening on 3490
sudo lsof -nP -i :3490

macOS

sudo lsof -nP -i :3490

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3490 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3490
netstat -ano | findstr :3490

From another machine

nmap -p 3490 -sV <host>
sudo nmap -sU -p 3490 <host>
nc -zv <host> 3490

Block it in the firewall

sudo ufw deny 3490/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3490" -Direction Inbound -LocalPort 3490 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3490 used for?

Port 3490 is assigned by IANA to colubris (Colubris Management Port).

Is port 3490 TCP or UDP?

Port 3490 is registered for TCP and UDP.

Is it safe to open port 3490?

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 3490 is open?

On Linux run "ss -ltnup 'sport = :3490'", on macOS "lsof -nP -i :3490", and on Windows "netstat -ano | findstr :3490" to see the local process. From another machine, "nmap -p 3490 <host>" shows whether it is reachable.

05 Related
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