I find a lot of threads on this but nobody ever appears to have actually done it.

Our company has a web front end that already has a very nice graphical login and password box.  I need to be able to re-direct it to DNN to prevent the user from having to login twice.

Am trying to make this code work from our front page,  but have not had success.

 <form name="Form" method="post" action="dnn/Default.aspx" id="Form" enctype="multipart/form-data" style="height: 100%;">
Name:<input name="dnn$ctr459$Signin$txtUsername" type="text"><br>
Password:<input name="dnn$ctr459$Signin$txtPassword" type="password"><br><br>
<input name="Submit1" type="submit" value="Login" />

</form>

I would love to hear some suggestions on how to make this work.

I did find something curious.   If you post the username in a field called "username"  it does put the users name in the login field but never logs in.

Were you able to find a way to login from an external sign-in form? I was also looking for a way to do this.

I see in the signin.ascx.vb code where the username can be populated from a Querystring but not the password.  I would prefer not to modify any of the core files if I can avoid it.

that only works on older versions of DNN (can't remember which version it stopped working for... possible 4.5.x) from what I was able to determine.  Alternatively, check out my module which I designed specifically for this reason (and a few other necessities).  Can see the SW.AutoLogon module here: http://www.seeleyware.com/ProductsModules/SWAutoLogon/tabid/306/language/en-US/Default.aspx