As a curious teenager in the late 90s I once started discovering nmap and subnet masks by scanning everything in my own subnet from my home Telia connection tha

As a curious teenager in the late 90s I once started discovering nmap and subnet masks by scanning everything in my own subnet from my home Telia connection that was in my mothers name. Shortly after a thick envelope came in the mail and I was very fortunate to catch it before my mother because in it was a stern warning from someone at Telia to stop scanning their equipment and several printed pages of this document on netiquette. I didn't read it all so I can't be sure it was that exact Rfc, and I'm pretty sure it was in Swedish, but the sheer volume of pages makes me think it was either this rfc translated or something very similar that Telia kept on hand. Either way, I never shat where I slept again and I read a lot about stealth scanning techniques and proxying after that. ☺