I used a null modem cable connected to an RS232 to USB adaptor plugged into a Raspberry PI running pppd. I can't really justify the cost of a network card just now. I'm saving for a Vampire.
I was hoping to post this comment using the Amiga but the only browsers that will run on it don't support the required SSL version :)
On the 2000 I just have to put the 64Door term disk in df0: and flip on the power. Within ~30-45 seconds I'm on the 64 BBSes. But the null-modem cable is an awesome way to go as it literally costs nothing... besides the cost of the cable. I find the modem approach, though, is more seamless of an experience with most term software.
I bought the 1200 new when I was a teenager and had a 4000 in the late nineties but didn't know about the dangers of leaking batteries and it died. I've got interested in Amigas again in the last couple of years after a 15 year break.
I'm going to have to check out some BBSes - I do miss them, not that I got heavily into them before the Internet came along and didn't really get a chance to join the community.
The BBS scene - when you find the right boards - can be a ton of fun. I really enjoy it. The sad truth is, there are a ton out there that are just being ignored and are like digital ghost towns. If more people popped back in there it's be even more fun. Hope to see you around! (I go by 'intric8' or 'amigalove'
Cheers