cannot connect to 168.192.1.1

> Model: R6400|AC1750 Smart WiFi Router

   Is that accurate?  R6400[v1] or R6400v2?  Look for "Model" on the
product label.  Connected to what?

> My local tech thinks Dell is prohibiting me [...]

   Why?  Why would "Dell" care?  How?  How could "Dell" be "prohibiting"
you from doing anything?  Time to look for a smarter "local tech"?

> Suggestions appreciated.

   "prohibiting me" is not a useful problem description.  It does not
say what you did.  It does not say what happened when you did it.  As
usual, showing actual actions (commands) with their actual results
(error messages, LED indicators, ...) can be more helpful than vague
descriptions or interpretations.

   A clear description of what _does_ happen would be more useful
than a vague description of what does _not_ happen.

   What's the IP address of your (Dell?) computer?  Which is connected
to what, how?

   Visit http://netgear.com/support , put in your (actual) model number,
and look for Documentation.  Get the User Manual (at least).  Read.
Beyond the basic set-up instructions, look for the LED descriptions and
"Troubleshoot".

> cannot connect to 168.192.1.1

   Regarding "cannot", see "not a useful problem description [...]",
above.  Presumably "168.192.1.1" was an error?