Port 1981
p2pq · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | p2pq |
Frequently asked questions
What is port 1981 used for?
Port 1981 is registered with the IANA for p2pq (TCP/UDP). Description: p2pQ.
Is port 1981 a well-known port?
No. Port 1981 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 1981 is open?
Locally on Linux with ss -tulpn | grep ':1981\b', on Windows with netstat -ano | findstr :1981. To test a remote host use Test-NetConnection <host> -Port 1981 in PowerShell or nc -zv <host> 1981 on Linux/macOS.
How do I open port 1981 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 1981/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=1981/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 1981" -Direction Inbound -Protocol TCP -LocalPort 1981 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | p2pq | p2pQ |
| UDP | p2pq | p2pQ |