Thanks everyone for the MTU discussion/ suggestions on the google issues. I’ll try adjusting the MTU. The https issue only just started. I had a letsencrypt certificate and auto-renew screwed up and I haven’t had a chance to fix it. That wasn’t a problem when I started this google thread, so won’t be the main issue with google.

Roger. VA7LBB

On May 9, 2019, at 04:35, Scott Nicholas scott.nicholas@scottn.us wrote:

...

However, I'm not convinced that this is the problem as the site works OK for me over internet. Why wouldn't it work for Google then?

We have to speculate somewhat..I don't know what the crawler uses for TCP stack. I know each OS is different in the ways it deals with MTU and blackholes. I did a wireshark capture on my Windows desktop and show a lot of black/red. I lowered my MTU by 40 and re-tried and there was lots of green. The TCP MSS coming from the web server was already lowered by 20. I don't know what it looks like on the far end. I'm also speculating that it's not getting ICMP or seeing a lower MSS for me.

Another reason I saw red -- a few links point to HTTPS and it is not enabled. Fix that, and set a lower MTU on the host, and we'll at least fix *some* problem. Maybe not the Googling indexing one. :)

Regards, Scott