DumbMonit

IntégrationsRéseau et pare-feu

Surveiller OpenVPN server avec DumbMonit

An OpenVPN server through its management interface: version, whether it reports itself connected, and every client currently in session with its addresses and traffic.

DocumentationSite officiel : OpenVPN

Les descriptions des produits sont en anglais, comme dans le produit. Les libellés de la page suivent votre langue.

Ce que DumbMonit surveille

OpenVPN's server process exposes its own control channel, the management interface: a local TCP listener, separate from the VPN itself, made for a monitoring tool rather than for a VPN client. DumbMonit reads it like any management client: the server's version, whether it reports itself connected, and every client currently in session, with its real and virtual address and its traffic. Nothing is ever sent that would change the server's state or disconnect a client. Clients are transient by nature — a laptop that goes to sleep simply disappears from the next reading. DumbMonit does not try to remember who was connected five minutes ago; it reports only who is connected now, plus the client…

Usage typique. OpenVPN server through its management interface: version, state, connected clients

Exemples

  • OpenVPN Access Server
  • A plain openvpn --server on Linux
  • pfSense or OPNsense OpenVPN (management enabled)

Comment il se connecte

Ce qu'il faut

  • Management passwordThe shared password set by the third argument of the server's "management" directive.

Aucun compte nécessaire.

Ports réseau à ouvrir

  • 7505/TCPManagement interface (default)
Étapes de mise en place: Turn on the management interface
  1. Add this line to the server's configuration (server.conf, or as.conf on OpenVPN Access Server) and restart OpenVPN.

    management 0.0.0.0 7505
  2. Recommended: protect it with a password, put in a file readable by the OpenVPN process alone and added as a third argument.

    management 0.0.0.0 7505 /etc/openvpn/management-password
  3. In DumbMonit, enter the server's address (vpn.lan, port 7505) and the management password if one is set.

À savoir. Anyone who reaches the management port and knows the password can disconnect clients and reconfigure the running server: allow only the DumbMonit host in the firewall and set a password.