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// Other services

Port 356: Cloanto Net 1

Port 356 is assigned by IANA to cloanto-net-1 (Cloanto Net 1).

356

How cloanto-net-1 works

Other services
client:356cloanto-net-1response client:356cloanto-net-1response

The client sends a request to port 356 and the cloanto-net-1 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 356 dangerous?

We have no specific security note for port 356. 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 356

ServicePortTransportDescriptionReferenceUpdated
cloanto-net-1 356 TCP, UDP Cloanto Net 1 - 2010-04-30

// source: IANA service name and port number registry

03 Check it

Which program uses port 356, and is it reachable?

Linux

sudo ss -ltnup 'sport = :356'      # process listening on 356
sudo lsof -nP -i :356

macOS

sudo lsof -nP -i :356

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 356 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 356
netstat -ano | findstr :356

From another machine

nmap -p 356 -sV <host>
sudo nmap -sU -p 356 <host>
nc -zv <host> 356

Block it in the firewall

sudo ufw deny 356/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 356" -Direction Inbound -LocalPort 356 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 356 used for?

Port 356 is assigned by IANA to cloanto-net-1 (Cloanto Net 1).

Is port 356 TCP or UDP?

Port 356 is registered for TCP and UDP.

Is it safe to open port 356?

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 356 is open?

On Linux run "ss -ltnup 'sport = :356'", on macOS "lsof -nP -i :356", and on Windows "netstat -ano | findstr :356" to see the local process. From another machine, "nmap -p 356 <host>" shows whether it is reachable.

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