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// Other services

Port 2127: INDEX-PC-WB

Port 2127 is assigned by IANA to index-pc-wb (INDEX-PC-WB).

2127

How index-pc-wb works

Other services
client:2127index-pc-wbresponse client:2127index-pc-wbresponse

The client sends a request to port 2127 and the index-pc-wb 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 2127 dangerous?

We have no specific security note for port 2127. 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 2127

ServicePortTransportDescriptionReferenceUpdated
index-pc-wb 2127 TCP, UDP INDEX-PC-WB - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2127, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2127'      # process listening on 2127
sudo lsof -nP -i :2127

macOS

sudo lsof -nP -i :2127

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2127 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2127
netstat -ano | findstr :2127

From another machine

nmap -p 2127 -sV <host>
sudo nmap -sU -p 2127 <host>
nc -zv <host> 2127

Block it in the firewall

sudo ufw deny 2127/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2127" -Direction Inbound -LocalPort 2127 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2127 used for?

Port 2127 is assigned by IANA to index-pc-wb (INDEX-PC-WB).

Is port 2127 TCP or UDP?

Port 2127 is registered for TCP and UDP.

Is it safe to open port 2127?

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 2127 is open?

On Linux run "ss -ltnup 'sport = :2127'", on macOS "lsof -nP -i :2127", and on Windows "netstat -ano | findstr :2127" to see the local process. From another machine, "nmap -p 2127 <host>" shows whether it is reachable.

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