1992-12-07 “Guidelines for the Secure Operation of the Internet” R. Pethia, CERT, S.Crocker, TIS, and B. Fraser, CERT
You can download it from the following link: https://packetstormsecurity.com/files/download/13980/rfc1281.ps
Source: https://packetstormsecurity.com/files/13980/rfc1281.ps.html