- 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.
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 servicesThe 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
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:
IANA registry entries for port 356
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| cloanto-net-1 | 356 | TCP, UDP | Cloanto Net 1 | - | 2010-04-30 |
// source: IANA service name and port number registry
Which program uses port 356, and is it reachable?
Linux
sudo ss -ltnup 'sport = :356' # process listening on 356
sudo lsof -nP -i :356macOS
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
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.
Other other services ports
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp