I get the "403" notice a lot from my use of a VPN. I just logged in from links I have saved for both the discussion and research sites...

What’s a VPN?

Virtual Private Network. My browser is Firefox/Mozilla and the VPN bounces my location around the globe to confuse and eliminate much of the trackware used to send me solicitation crap I don't want, especially items their AI programs "think" I may be interested in.