There's a NS record so *.acme-dns.example.com delegates requests to it, so each of my hosts that need a cert have a public CNAME like _acme-challenge.www.example.com CNAME asdfasf.acme-dns.example.com which points back to the acme-dns server.

When setting up a new hostname/certificate, a REST request is sent to acme-dns to register a new username/password/subdomain which is fed to acme.sh. Then every time acme.sh needs to issue/renew the certificate it sends the TXT info to the internal acme-dns server, which in turn makes it available to the world.

Just the last several months I've been using Qmodem scripting to make thousands of modem calls over VoIP to test downloads to see which models and ATAs work best.

After I jumped back into the vintage BBS world I've been keeping an eye out for anything Qmodem. I recently just picked up a Qmodem manual on ebay that I wanted to scan and archive, because it's pretty rare to see.

Not too long ago I saw where John had posted to a FB group he was working on a new DOS version of Qmodem, my first interaction with him. I was excited to see it be worked on again and hoped to see the new version. Sad to see him go.

I do remember playing some MIDI files on it and realizing how good it sounded compared to my basic SoundBlaster 16, which made me go out and get a SB AWE32.

IIRC it had a rather extensive help lookup system for functions, data types, reference tables, error codes, and whatnot. You could step through your program, set debug points, all without exiting to DOS. It was my first ever exposure to an IDE, I thought it was pretty nice for what it was.

Probes to hops beyond will virtually always go through the fast data plane.

This distinction was getting lost to time even back then with everyone just assuming it was some arbitrary FCC limit. This post from NANOG in 1998 explains it: https://archive.nanog.org/mailinglist/mailarchives/old_archi...

I set up Wildcat! 4 (a DOS based BBS software) earlier this year and have had a blast with reliving the past. It was interesting to figure out how true to period vintage to run it vs letting some newness leak in, with 30 years of hardware and connectivity options to select from.

I wound up doing both dial-up and telnet access, and just last week got an UUCP gateway setup so it can dial out to a Raspberry Pi and send/receive internet email.

Encryption was seldom used there for POP3/IMAP/SMTP because hey you're on the same ISP network and not crossing the Internet. Further it was pretty easy to hop on a terminal server like a Portmaster and do a debug/packet dump of individual dialup connections if somebody really wanted to see what somebody was doing.