README.txt

   1 == Overview ==
   2
   3 A Nagios plugin for checking whether or not an OpenVPN server is
   4 alive.
   5
   6 We don't actually interact with the OpenVPN server; we merely send it
   7 a a magic (heretofore unexplained) byte sequence and ensure that we
   8 get some kind of response.
   9
  10 If the server uses a TLS auth key, the response will be empty but at
  11 least it will come, preventing a timeout.
  12
  13 == Examples ==
  14
  15 Perform a basic check using the default port and protocol:
  16
  17   $ check_openvpn-simple vpn1.example.com
  18   OK 22.471ms
  19
  20 Check a server that runs on TCP/443 (this is used to sneak past
  21 firewalls that allow HTTPS but block other traffic):
  22
  23   $ check_openvpn-simple --tcp --port 443 vpn2.example.com
  24   OK 14.801ms