[minroot]

PDFs provided by datatracker.ietf.org don't have hyperlinks. html rfc URLs on tools.ietf.org (which had links to PDF) now redirects to datatracker.ietf.org

PDFs from tools.ietf.org are still available on their previous URLs. like for rfc791 it is https://tools.ietf.org/pdf/rfc791.pdf

[1vuio0pswjnm7]

Today, IETF uses Cloudlfare.

(Although the same old IETF IP addresses can still be accessed directly, e.g., 4.31.198.44.)

I have always used a one line script to fetch the text versions of RFCs. It has always been the fastest. In the early days all RFCs were plain text, no HTML.

Something like below except I use custom programs for HTTP generation, chunked transfer decoding and ESNI-enabled openssl. Also they allow RFC2616 HTTP pipelining so I can retrieve multiple RFCs with one TCP connection.

   test $# = 1||exec echo usage: $0 rfc-no\|draft-id
   printf "GET /rfc/rfc$1.txt HTTP/1.0\r\nHost: www.ietf.org\r\nConnection: close\r\n\r\n"|openssl s_client -tls1_3 -4 -servername www.ietf.org -ign_eof -connect 104.16.249.249:443|less

(104.16.0.0./12 is one of many Cloudflare blocks that can be used.)