I'm not sure how best to describe this, but sometimes, a client visiting one of my websites ends up on another that's hosted on my server. All sites on my server have LE certificates so when he ends up on a different server, there's the warning of the SSL certificate name not matching the webiste which is to be expected. He's seen this when trying different source IPs (on a VPN). I don't know exactly if his VPN is presenting things strangely giving Apache confusing messages and then pointing to the wrong vhost. His site: hdtechlogic.com Sometimes, ends up on jhudson.co.uk I've been through the Apache logs cross-checking his source IPs with the websites and everything seems to match and I cannot see anything wrong there, and as far as I can tell, DNS is set up correclty - both domains have the primary domain and A/AAAA "www" subdomain records created, all pointing to my server's IP. Any ideas where to look?