They seem to have done (a) and imposed a very bad configuration.Alternative solutions: a) customers must not be allowed to replace the software (pretty easy and cheap; works on existing hardware) Only (a) can be retrofitted on existing hardware. TP-Link did the obvious thing. I hate it (as a customer who actually bought one of their devices to run OpenWRT). But it really is a choice between (a) and (z) on existing devices.
--dave
-- David Collier-Brown, | Always do right. This will gratify System Programmer and Author | some people and astonish the rest davecb@spamcop.net | -- Mark Twain