Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt-01
Joe Touch <touch@ISI.EDU> Tue, 29 July 2008 22:29 UTC
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Date: Tue, 29 Jul 2008 15:28:59 -0700
From: Joe Touch <touch@ISI.EDU>
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To: Adam Langley <agl@imperialviolet.org>
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Subject: Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt-01
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Adam, Adam Langley wrote: | Some points from the discussion: | | Regarding NATs: | | Your reasoning, as I understood it, for not including an option to | exclude the pseudoheader and port numbers for NAT traversal was that | the host needs these items to lookup the correct key anyway. | | There are several situation where this is not the case. (I'll point | out that I see TCP-AO as being useful outside the domain of securing | BGP sessions between backbone routers) | | 1) A host installs a key on a listening socket with a wildcard | address. We don't support this use. There are no wildcard addresses in installed keys; only the source port can be wildcarded. | Thus, one can only connect to the socket if you know the key. | The key probably rotates based on time. This is currently, usually | done based on "port knocking" - which has always struck me as a messy | solution. The resulting, ESTABLISHED connection knows the port numbers | and IP addresses without having to establish it before hand. | | 2) An unauthenticated connection is established and the userland code | wishes to upgrade to TCP-AO. Again, since the connection is | established the keyset to use are implicit. I didn't know that the | NONE mac was designed for upgrading like this. In my Linux patches | there's a TCP_AUTH_LATCH option which means "accept unsigned packets | until the first signed packet, then require signatures". That's changing from NONE to a non-NONE MAC. | Keyids: | | I agree that keeping the cryptography in the MAC is a good thing. | There is an implementation issue about the number of keys that a | kernel may have to store (80ish bytes per key * 256 keys * number of | configured hosts), but that's not a spec problem. Agreed. I'll try to capture that. Joe -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkiPmasACgkQE5f5cImnZruPvACffvwthv0WF/N3MYbXQgZjt7Ft lwsAoIXk+Ac9/1YH9xp3xFdlEb/1ym+v =xP0v -----END PGP SIGNATURE----- _______________________________________________ tcpm mailing list tcpm@ietf.org https://www.ietf.org/mailman/listinfo/tcpm
- [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt-01 Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Adam Langley
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Adam Langley
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Adam Langley
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Anantha Ramaiah (ananth)
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Anantha Ramaiah (ananth)
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Anantha Ramaiah (ananth)
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Caitlin Bestler
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Joe Touch
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Lars Eggert
- Re: [tcpm] Review of draft-ietf-tcpm-tcp-auth-opt… Eric Rescorla
- [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Adam Langley
- Re: [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Adam Langley
- Re: [tcpm] tcp-auth-opt issue: replay protection Eric Rescorla
- Re: [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Adam Langley
- Re: [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Lars Eggert
- Re: [tcpm] tcp-auth-opt issue: replay protection Eric Rescorla
- Re: [tcpm] tcp-auth-opt issue: replay protection Lars Eggert
- Re: [tcpm] tcp-auth-opt issue: replay protection Anantha Ramaiah (ananth)
- Re: [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Eddy, Wesley M. (GRC-RCN0)[VZ]
- Re: [tcpm] tcp-auth-opt issue: replay protection Adam Langley
- Re: [tcpm] tcp-auth-opt issue: replay protection Caitlin Bestler
- Re: [tcpm] tcp-auth-opt issue: replay protection Joe Touch
- Re: [tcpm] tcp-auth-opt issue: replay protection Ron Bonica