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// Other services

Port 2616: appswitch-emp

Port 2616 is assigned by IANA to appswitch-emp (appswitch-emp).

2616

How appswitch-emp works

Other services
client:2616appswitch-empresponse client:2616appswitch-empresponse

The client sends a request to port 2616 and the appswitch-emp 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 2616 dangerous?

We have no specific security note for port 2616. 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 2616

ServicePortTransportDescriptionReferenceUpdated
appswitch-emp 2616 TCP, UDP appswitch-emp - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2616, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2616'      # process listening on 2616
sudo lsof -nP -i :2616

macOS

sudo lsof -nP -i :2616

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2616 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2616
netstat -ano | findstr :2616

From another machine

nmap -p 2616 -sV <host>
sudo nmap -sU -p 2616 <host>
nc -zv <host> 2616

Block it in the firewall

sudo ufw deny 2616/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2616" -Direction Inbound -LocalPort 2616 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2616 used for?

Port 2616 is assigned by IANA to appswitch-emp (appswitch-emp).

Is port 2616 TCP or UDP?

Port 2616 is registered for TCP and UDP.

Is it safe to open port 2616?

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 2616 is open?

On Linux run "ss -ltnup 'sport = :2616'", on macOS "lsof -nP -i :2616", and on Windows "netstat -ano | findstr :2616" to see the local process. From another machine, "nmap -p 2616 <host>" shows whether it is reachable.

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