Port 4087
applusservice · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | applusservice |
| Registered | 2008-06-05 |
| Modified | 2021-08-09 |
Frequently asked questions
What is port 4087 used for?
Port 4087 is registered with the IANA for applusservice (TCP/UDP). Description: APplus Service; Reserved.
Is port 4087 a well-known port?
No. Port 4087 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 4087 is open?
Locally on Linux with ss -tulpn | grep ':4087\b', on Windows with netstat -ano | findstr :4087. To test a remote host use Test-NetConnection <host> -Port 4087 in PowerShell or nc -zv <host> 4087 on Linux/macOS.
How do I open port 4087 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 4087/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4087/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4087" -Direction Inbound -Protocol TCP -LocalPort 4087 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | applusservice | APplus Service |
| UDP | – | Reserved |