Is there a list anywhere of which RRs utilize or historically have utilized RFC1035 compression in BIND (any version) or other name servers out there? I know that BIND 8.2 fixed a bug where SRV records were erroneously compressed. I know that "question data", NS, CNAME, PTR, MX, and SOA RRs can use compression. I have heard that historical versions of BIND used to compress RP data. Any other RRs which I have to worry about having compressed data in? On a related topic, is it safe to assume that compression pointers only point to previously occuring one-octet length fields in a domain name (cf RFC1035 section 3.1) or previous compression pointers? - Sam
