1. There is a Logout button, isn't it? Logout first and you should be able to enter again. 2. When you cannot serf the internet, can you login its web interface and check if there is WAN IP? Firmware...

Even though they can connect to the RE200, but it shows 'Limited' connection in the Networks panel. With limited connection, what's the IP address, default gateway, DNS server obtained? If it is...

W8968 V3 has no such an option indeed...As I know, their SOHO routers have PPTP option, for example, TL-WR841N. You can check its emulator here. Maybe that's what you need......

So I tested it with just one device and found that it still reboots. All lights went off and came back on automatically for no reason? Are you using the original power adapter? Try to Disable IGMP...

What's the hardware version and firmware version of your W8968? W8968 is working as a wireless router, right? When the connection doesn't work, there is WAN IP address? Can you ping google.com or...

Reset the router to factory defaults and reconfigure it. Check the signal strength using inSSIDer or Arcylic Wi-Fi. Provide the screenshot pls.