I have been selected as the General Area Review Team (Gen-ART) reviewer for this draft (for background on Gen-ART, please see http://www.alvestrand.no/ietf/gen/art/gen-art-FAQ.html). Please wait for direction from your document shepherd or AD before posting a new version of the draft. Document: draft-ietf-v6ops-scanning-implications-03.txt Reviewer: Brian Carpenter Review Date: 2007-10-29 IETF LC End Date: none IESG Telechat date: 2007-11-01 Summary: Ready, one query Comments: Substantive: Section 3.2 ... It is also worth noting that the reverse DNS tree may also expose address information. In such cases, populating the reverse DNS tree for the entire subnet, even if not all addresses are actually used, may reduce that exposure. Doesn't this suggest that it's OK to publish 2^64 bogus PTR records for every subnet? By the way: I've tracked this draft in the WG. As the writeup says "The working group process was uneventful." I recall relatively little discussion or contention. There was one short comment thread by Jonne Soinenen and myself that didn't get implemented, but it doesn't seem to justify action at this stage - see http://ops.ietf.org/lists/v6ops/v6ops.2007/msg00325.html http://ops.ietf.org/lists/v6ops/v6ops.2007/msg00326.html