Automating "check vpn" through C#

Question

Hello,
I would like to automatically check if the VPN is up or down, simple enough, and respond by bumping it, disconnecting and connecting, as needs be (not so simple I think).
This through a C# program using HttpWebRequest and HttpWebResponse.
It's simple enough to login to the VPN page using known credentials. Done deal. And also very easy to check a couple of known patterns in the VPN table.
When I determine I need to bump the VPN, how do we simulate the form submission and/or call to the JavaScript programmatically?
Forgot to mention: we're using a Linksys WRVS4400N router, firmware version V1.1.13.
Thank you...
Best regards,
Michael

Answer 1

Thus far I can successfully GET the vpn_summary page for details like I said.
I am making an attempt at a forms POST to do the other direction now, and running into issues.
If I just POST with minimal parameters, I get the following WebException saying Status == ConnectionClosed ("connection closed unexpectedly") and the VPN goes down.
I am setting todo=tunnel_connect and h_ipsec_select=OurVpnNam: "todo=tunnel_connect&h_ipsec_select=OurVpnName", which ends up getting written to the WebRequest through GetRequestStream(), Write() the stream, and Close().
request.ContentType = "application/x-www-form-urlencoded" and request.Method = "POST".
I know that authorization succeeds in general because we can process the request just fine on the front side of the utility.
So actually, my thought is that there are some hidden (or not hidden) form fields that we are missing in order to make the request good to the server?