I have a home server for my security cameras. I'd like to be able to access my server via https rather than http, but my ISP (Comcast) blocks ports 443 and 80. Thus, I need to use a non-standard port.

I've tried using LetsEncrypt's bot, but can't seem to get past the verification stage (which goes through port 80). I've seen workarounds on various sites, but the instructions are rather confusing. For example, it's apparently possible to tell LE's bot to use DNS records for verification, but this involves adding a TXT record, which I'm not quite sure how to do.

What is the best way to get a working certificate for my webcam site?

Thanks
Eric

this is no longer a true statement. Comcast is not blocking 443 only 80. at least for me which im thinking im not special.