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// Other services

Port 3405: Nokia Announcement ch 1

Port 3405 is assigned by IANA to nokia-ann-ch1 (Nokia Announcement ch 1).

3405

How nokia-ann-ch1 works

Other services
client:3405nokia-ann-ch1response client:3405nokia-ann-ch1response

The client sends a request to port 3405 and the nokia-ann-ch1 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 3405 dangerous?

We have no specific security note for port 3405. 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 3405

ServicePortTransportDescriptionReferenceUpdated
nokia-ann-ch1 3405 TCP, UDP Nokia Announcement ch 1 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3405, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3405'      # process listening on 3405
sudo lsof -nP -i :3405

macOS

sudo lsof -nP -i :3405

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3405 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3405
netstat -ano | findstr :3405

From another machine

nmap -p 3405 -sV <host>
sudo nmap -sU -p 3405 <host>
nc -zv <host> 3405

Block it in the firewall

sudo ufw deny 3405/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3405" -Direction Inbound -LocalPort 3405 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3405 used for?

Port 3405 is assigned by IANA to nokia-ann-ch1 (Nokia Announcement ch 1).

Is port 3405 TCP or UDP?

Port 3405 is registered for TCP and UDP.

Is it safe to open port 3405?

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 3405 is open?

On Linux run "ss -ltnup 'sport = :3405'", on macOS "lsof -nP -i :3405", and on Windows "netstat -ano | findstr :3405" to see the local process. From another machine, "nmap -p 3405 <host>" shows whether it is reachable.

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