Port 9877
x510 · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | x510 |
| Reference | ITU-T X.510 / ISO/IEC 9584-11 |
| Registered | 2019-09-30 |
Frequently asked questions
What is port 9877 used for?
Port 9877 is registered with the IANA for x510 (TCP/UDP). Description: The X.510 wrapper protocol; Reserved.
Is port 9877 a well-known port?
No. Port 9877 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 9877 is open?
Locally on Linux with ss -tulpn | grep ':9877\b', on Windows with netstat -ano | findstr :9877. To test a remote host use Test-NetConnection <host> -Port 9877 in PowerShell or nc -zv <host> 9877 on Linux/macOS.
How do I open port 9877 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 9877/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=9877/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 9877" -Direction Inbound -Protocol TCP -LocalPort 9877 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | x510 | The X.510 wrapper protocol |
| UDP | – | Reserved |