Port 861
owamp-control and owamp-test · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | owamp-control and owamp-test |
| Reference | RFC 4656, RFC 8545 |
| Modified | 2018-12-21 |
Frequently asked questions
What is port 861 used for?
Port 861 is registered with the IANA for owamp-control and owamp-test (TCP/UDP). Description: OWAMP-Control; OWAMP-Test.
Is port 861 a well-known port?
Yes. Port 861 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.
How do I check whether port 861 is open?
Locally on Linux with ss -tulpn | grep ':861\b', on Windows with netstat -ano | findstr :861. To test a remote host use Test-NetConnection <host> -Port 861 in PowerShell or nc -zv <host> 861 on Linux/macOS.
How do I open port 861 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 861/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=861/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 861" -Direction Inbound -Protocol TCP -LocalPort 861 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | owamp-control | OWAMP-Control |
| UDP | owamp-test | OWAMP-Test |