Last Call Review of draft-ietf-dnssd-hybrid-07
|Type||Last Call Review|
|Team||Ops Directorate (opsdir)|
|Requested by||Terry Manderson|
Genart Last Call review of -07 by Joel Halpern
Secdir Last Call review of -07 by Dan Harkins
Please review this document especially in light of DNS semantics, DNS operation, and implications (if any) in IoT.
|Review result||Has Nits|
|Draft last updated||2017-10-22|
I reviewed this draft draft-ietf-dnssd-hybrid-07 on behalf of the operations and management area directorate. While the security considerations do address the problem of information leakage from publishing information in DNS zones that may be resolvable from outside the administrative zone that they are intended to be used in, I think the reverse zone and in particular the IPv4 reverse zone are particularly subject to this problem. if the nameservers serving the reverse zone are those to which the public ipv4 prefix is delegated then is is possible to walk the zone, trolling for hosts that may not otherwise be easy to identify (because you do not know apriori what services they might be advertising). This might identify particular hosts, but it also might be used to identify subnets in which dynamic allocation occur or where hosts come and go. I think it would be desirable to provide explanatory texts on the potential dangers of exposing the reverse zones in particular.