Hi, In the dnssd WG, we are developing methods to enable scalable DNS-based service discovery, which in practice means enabling mDNS/DNS-SD to work over multiple links within a site. As defined, mDNS/DNS-SD are link-local protocols, not forwarded by routers. If successful, one ‘win’ is that users with devices can discover services that may be physically near them, but that lie in a different subnet.
At a high level, the proposed solution works by clients/resolvers sending queries to hybrid proxies running on specific subnets (which may be manually configured in an enterprise scenario, or auto-discovered in an unmanaged home network scenario), which then issue local service discovery messages, the answers to which are relayed back to the originating querier. We’re encouraging discussion of privacy considerations in the WG. As a result, we now have a draft (see below), including an initial proposal for a solution, for which we’d welcome wider review. The draft also addresses mDNS/DNS-SD privacy within single subnet scenarios. Feel free to comment here, or join the dnssd WG list and contribute there. Many thanks, Tim & Ralph, dnssd WG co-chairs Begin forwarded message: From: Christian Huitema <huit...@microsoft.com<mailto:huit...@microsoft.com>> Subject: [dnssd] FW: New Version Notification for draft-huitema-dnssd-privacy-01.txt Date: 10 June 2016 at 21:02:50 BST To: "dn...@ietf.org<mailto:dn...@ietf.org>" <dn...@ietf.org<mailto:dn...@ietf.org>> Cc: Daniel Kaiser <daniel.kai...@uni-konstanz.de<mailto:daniel.kai...@uni-konstanz.de>> Here is a new version of the "DNS-SD Privacy" draft. I co-authored it with Daniel Kaiser. Daniel is completing his PhD at the University of Konstanz, in Germany, studying issues related to privacy and discovery. This new draft is in my opinion much improved from the version 00 that I presented in Buenos Aires. You can read the abstract below for the broad lines of the proposed solution. Or, better yet, read the draft and comment! -- Christian Huitema -----Original Message----- From: internet-dra...@ietf.org<mailto:internet-dra...@ietf.org> [mailto:internet-dra...@ietf.org] Sent: Friday, June 10, 2016 12:35 PM To: Christian Huitema <huit...@microsoft.com<mailto:huit...@microsoft.com>>; Daniel Kaiser <daniel.kai...@uni-konstanz.de<mailto:daniel.kai...@uni-konstanz.de>> Subject: New Version Notification for draft-huitema-dnssd-privacy-01.txt A new version of I-D, draft-huitema-dnssd-privacy-01.txt has been successfully submitted by Christian Huitema and posted to the IETF repository. Name: draft-huitema-dnssd-privacy Revision: 01 Title: Privacy Extensions for DNS-SD Document date: 2016-06-10 Group: Individual Submission Pages: 26 URL: https://www.ietf.org/internet-drafts/draft-huitema-dnssd-privacy-01.txt Status: https://datatracker.ietf.org/doc/draft-huitema-dnssd-privacy/ Htmlized: https://tools.ietf.org/html/draft-huitema-dnssd-privacy-01 Diff: https://www.ietf.org/rfcdiff?url2=draft-huitema-dnssd-privacy-01 Abstract: DNS-SD allows discovery of services published in DNS or MDNS. The publication normally discloses information about the device publishing the services. There are use cases where devices want to communicate without disclosing their identity, for example two mobile devices visiting the same hotspot. We propose to solve this problem by a two-stage approach. In the first stage, hosts discover Private Discovery Service Instances via DNS-SD using special formats to protect their privacy. These service instances correspond to Private Discovery Servers running on peers. In the second stage, hosts directly query these Private Discovery Servers via DNS-SD over TLS. A pairwise shared secret necessary to establish these connections is only known to hosts authorized by a pairing system. Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org<http://tools.ietf.org>. The IETF Secretariat _______________________________________________ dnssd mailing list dn...@ietf.org<mailto:dn...@ietf.org> https://www.ietf.org/mailman/listinfo/dnssd
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