CyberHunter
Local dataset, no network
// Other services

Port 2141: IAS-ADMIND

Port 2141 is assigned by IANA to ias-admind (IAS-ADMIND).

2141

How ias-admind works

Other services
client:2141ias-admindresponse client:2141ias-admindresponse

The client sends a request to port 2141 and the ias-admind 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 2141 dangerous?

We have no specific security note for port 2141. 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 2141

ServicePortTransportDescriptionReferenceUpdated
ias-admind 2141 TCP, UDP IAS-ADMIND - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2141, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2141'      # process listening on 2141
sudo lsof -nP -i :2141

macOS

sudo lsof -nP -i :2141

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2141 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2141
netstat -ano | findstr :2141

From another machine

nmap -p 2141 -sV <host>
sudo nmap -sU -p 2141 <host>
nc -zv <host> 2141

Block it in the firewall

sudo ufw deny 2141/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2141" -Direction Inbound -LocalPort 2141 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2141 used for?

Port 2141 is assigned by IANA to ias-admind (IAS-ADMIND).

Is port 2141 TCP or UDP?

Port 2141 is registered for TCP and UDP.

Is it safe to open port 2141?

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 2141 is open?

On Linux run "ss -ltnup 'sport = :2141'", on macOS "lsof -nP -i :2141", and on Windows "netstat -ano | findstr :2141" to see the local process. From another machine, "nmap -p 2141 <host>" shows whether it is reachable.

05 Related
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