I host a website behind a talktalk VDSL router but when I access it from home the address is changed from http://... to https:// ..
and I'm told "The owner of 'my website' has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website." A similar message is received when using Chrome. It seems that the security certificate of the router is invalid. This occurs only when accessing the site from the LAN. Is this a common problem, or do I have a faulty router?