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// Other services

Port 2211: EMWIN

Port 2211 is assigned by IANA to emwin (EMWIN).

2211

How emwin works

Other services
client:2211emwinresponse client:2211emwinresponse

The client sends a request to port 2211 and the emwin 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 2211 dangerous?

We have no specific security note for port 2211. 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 2211

ServicePortTransportDescriptionReferenceUpdated
emwin 2211 TCP, UDP EMWIN - 2008-03-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 2211, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2211'      # process listening on 2211
sudo lsof -nP -i :2211

macOS

sudo lsof -nP -i :2211

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2211 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2211
netstat -ano | findstr :2211

From another machine

nmap -p 2211 -sV <host>
sudo nmap -sU -p 2211 <host>
nc -zv <host> 2211

Block it in the firewall

sudo ufw deny 2211/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2211" -Direction Inbound -LocalPort 2211 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2211 used for?

Port 2211 is assigned by IANA to emwin (EMWIN).

Is port 2211 TCP or UDP?

Port 2211 is registered for TCP and UDP.

Is it safe to open port 2211?

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 2211 is open?

On Linux run "ss -ltnup 'sport = :2211'", on macOS "lsof -nP -i :2211", and on Windows "netstat -ano | findstr :2211" to see the local process. From another machine, "nmap -p 2211 <host>" shows whether it is reachable.

05 Related
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