Re: [tcpm] tcpsecure recommendations
David Borman <david.borman@windriver.com> Wed, 06 February 2008 18:42 UTC
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From: David Borman <david.borman@windriver.com>
To: mallman@icir.org
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Date: Wed, 06 Feb 2008 12:42:22 -0600
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Subject: Re: [tcpm] tcpsecure recommendations
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I think the applicability statement is a great addition. I'm in favor of (3), SHOULD/SHOULD/MAY. -David Borman On Feb 6, 2008, at 11:40 AM, Mark Allman wrote: > > Folks- > > It'd be good to get some opinions on the new tcpsecure version and get > it finished. The sticking point on this document is how strongly to > recommend TCP stacks implement / use the three mitigations in the > draft > (to spoofed RSTs, SYNs and data segments). We had a discussion about > this in Chicago and also on the list. Since it seemed that we were > not > converging because there was not WG-wide agreement on the scope of the > document we asked the authors to generate an applicability statement. > They did that, per a previous email from Anantha. The AS reads: > > The mitigations presented in this document talks about some known > in-window attacks and the solutions to the same. The mitigations > suggested in this draft SHOULD (RECOMMENDED) be implemented in > devices where the TCP connections are most vulnerable to the > attacks > described in this document. Some examples of such TCP connections > are the ones that tend to be long-lived where the connection end > points can be determined, in cases where no auxiliary anti-spoofing > protection mechanisms like TCP MD5 can be deployed. TCP secure MAY > (OPTIONAL) be implemented in other cases. > > We can recommend each of mitigations with a MAY, SHOULD or MUST. In > Chicago we winnowed the proposals to three three: > > (1) RST spoofing mitigation: MAY > SYN spoofing mitigation: MAY > data injection mitigation: MAY > > (2) RST spoofing mitigation: SHOULD > SYN spoofing mitigation: SHOULD > data injection mitigation: SHOULD > > (3) RST spoofing mitigation: SHOULD > SYN spoofing mitigation: SHOULD > data injection mitigation: MAY > > Nobody has advocated for other permutations of recommendations > (although, clearly if people like some different combination they > should > advocate away!). > > Can folks please weigh in on their feeling about how strongly we > should > recommend these mitigations given the AS above? It'd be great to get > this document moving and we're sort of stuck here. > > Thanks, > allman > > > > _______________________________________________ > tcpm mailing list > tcpm@ietf.org > http://www.ietf.org/mailman/listinfo/tcpm _______________________________________________ tcpm mailing list tcpm@ietf.org http://www.ietf.org/mailman/listinfo/tcpm
- [tcpm] tcpsecure recommendations Mark Allman
- Re: [tcpm] tcpsecure recommendations David Borman
- Re: [tcpm] tcpsecure recommendations Anantha Ramaiah (ananth)
- Re: [tcpm] tcpsecure recommendations Joe Touch
- Re: [tcpm] tcpsecure recommendations Anantha Ramaiah (ananth)
- Re: [tcpm] tcpsecure recommendations Joe Touch
- Re: [tcpm] tcpsecure recommendations Anantha Ramaiah (ananth)
- Re: [tcpm] tcpsecure recommendations Joe Touch
- Re: [tcpm] tcpsecure recommendations Anantha Ramaiah (ananth)
- Re: [tcpm] tcpsecure recommendations Joe Touch
- Re: [tcpm] tcpsecure recommendations Anantha Ramaiah (ananth)
- Re: [tcpm] tcpsecure recommendations Mark Allman
- Re: [tcpm] tcpsecure recommendations Tom Petch
- Re: [tcpm] tcpsecure recommendations Mark Allman