Port 3876
dl-agent and dl_agent · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | dl-agent and dl_agent |
| Registered | 2008-12-16 |
Frequently asked questions
What is port 3876 used for?
Port 3876 is registered with the IANA for dl-agent and dl_agent (TCP/UDP). Description: DirectoryLockdown Agent IANA assigned this well-formed service name as a replacement for "dl_agent".; DirectoryLockdown Agent.
Is port 3876 a well-known port?
No. Port 3876 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 3876 is open?
Locally on Linux with ss -tulpn | grep ':3876\b', on Windows with netstat -ano | findstr :3876. To test a remote host use Test-NetConnection <host> -Port 3876 in PowerShell or nc -zv <host> 3876 on Linux/macOS.
How do I open port 3876 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 3876/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3876/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3876" -Direction Inbound -Protocol TCP -LocalPort 3876 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | dl-agent | DirectoryLockdown Agent IANA assigned this well-formed service name as a replacement for "dl_agent". |
| TCP | dl_agent | DirectoryLockdown Agent |
| UDP | dl-agent | DirectoryLockdown Agent IANA assigned this well-formed service name as a replacement for "dl_agent". |
| UDP | dl_agent | DirectoryLockdown Agent |