Re: [DNSOP] DNSKEY RRset size and the root
Liang Zhu <liangzhu@usc.edu> Mon, 26 January 2015 17:58 UTC
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References: <alpine.LFD.2.10.1501191417240.2981@bofh.nohats.ca> <273A9C85-EC12-4916-99E4-C4839E553555@virtualized.org> <alpine.LFD.2.10.1501221308540.14274@bofh.nohats.ca> <CAC3z6OjZB=3JjLFDY=dt7kA8W993af5VSz6Gaa-B9Eb7Z40Kmw@mail.gmail.com> <F5BB5028-12FD-4D08-B631-055344BE4FC3@vpnc.org> <48AE7501-A80A-40B1-8FDA-34984AA4D42A@icsi.berkeley.edu>
Date: Mon, 26 Jan 2015 09:58:00 -0800
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From: Liang Zhu <liangzhu@usc.edu>
To: Nicholas Weaver <nweaver@icsi.berkeley.edu>
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Cc: IETF DNSOP WG <dnsop@ietf.org>, Paul Hoffman <paul.hoffman@vpnc.org>
Subject: Re: [DNSOP] DNSKEY RRset size and the root
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On Fri, Jan 23, 2015 at 10:12 AM, Nicholas Weaver <nweaver@icsi.berkeley.edu> wrote: > >> On Jan 23, 2015, at 10:01 AM, Paul Hoffman <paul.hoffman@vpnc.org> wrote: >> >> What is the problem with #2? IP fragmentation happens, and The Internet is expected to work with it. That is, of what possible value is "inform their customers"? > > The Internet has unfortunately decreed that Fragmentation Does Not Work with IPv4, and Really Does Not Work with IPv6. > > This will cause timeouts until the resolver realizes it should use a smaller EDNS0 MTU and in that case, the resolver will failover to TCP for that query, which some in the DNS community view as anathema... > Besides the additional latency caused by loss recovery, as Nicholas said, fragments may also bring problem of fragmentation attack described in: A. Herzberg and H. Shulmanz. Fragmentation considered poisonous. In Proc. of IEEE Conference on Communications and NetworkSecurity (CNS), Oct. 2013. -Liang Zhu
- [DNSOP] DNSKEY RRset size and the root Paul Wouters
- Re: [DNSOP] DNSKEY RRset size and the root David Conrad
- Re: [DNSOP] DNSKEY RRset size and the root Paul Wouters
- Re: [DNSOP] DNSKEY RRset size and the root Liang Zhu
- Re: [DNSOP] DNSKEY RRset size and the root Paul Hoffman
- Re: [DNSOP] DNSKEY RRset size and the root Nicholas Weaver
- Re: [DNSOP] DNSKEY RRset size and the root Mark Andrews
- Re: [DNSOP] DNSKEY RRset size and the root Paul Wouters
- Re: [DNSOP] DNSKEY RRset size and the root Paul Vixie
- Re: [DNSOP] DNSKEY RRset size and the root Liang Zhu
- Re: [DNSOP] DNSKEY RRset size and the root Mark Andrews