Re: [OPSAWG] New Version Notification for draft-reddy-opsawg-mud-tls-02.txt
Michael Richardson <mcr+ietf@sandelman.ca> Wed, 22 January 2020 17:25 UTC
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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: tirumal reddy <kondtir@gmail.com>
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Date: Wed, 22 Jan 2020 12:25:46 -0500
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Subject: Re: [OPSAWG] New Version Notification for draft-reddy-opsawg-mud-tls-02.txt
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tirumal reddy <kondtir@gmail.com> wrote: >> It will be easier for vendors to avoid interposing themselves on >> communications that would present legal problems if this extension can >> clearly say hands-off. >> > I don't get the comment. The decision whether to deploy a TLS proxy for the > IoT devices/endpoints is up to the organization owning them. The TLS proxy > has to meet the organization security and privacy requirements. Further, > middle box administrator configure the firewall to bypass > traffic decryption for a connection destined to a specific service due to > privacy compliance requirements. In Enterprises that own and control all device that might be true. In residential situations where the ISP owns the home router, that's not true. >> > Middle boxes from several security vendors acting as TLS proxies do >> > keep up with the updates to protocols >> >> Well, it's never the good actors that cause the problem. >> It's the bad ones :-) >> > I don't think organizations who care about security and privacy, and most > importantly their reputation and business will deploy such bad TLS proxies. But, those bad ones meant that TLS 1.3 had to adapt to them, rather than the other way around. >> The problem here is that the EST mechanism as envisioned by BRSKI is not >> intended to be a general trust anchor, but rather to validate items that >> are >> within the same domain. mcr> I just don't think that this is a good way to introduce alternate mcr> trust roots. My recommendation is that you go ahead with the MUD mcr> profile that describes TLS profiles, without tying that to TLS proxy mechanisms. > Got it, thanks; updated draft to say the mechanism to configure the IoT > device with the middlebox's CA certificate is out of scope. mcr> The malware will include it's own non-public trust-anchor. > If malware uses it's own non-public trust-anchor, it will be detected by > the TLS profile (acceptlist-ta-certs and SPKI-pin-sets) and the > malware flow will be blocked. I'm trying to say that the same process is a reasonable way for the device to call home for firmware updates. So I suggest that since we have MUD ACLs, even for devices which might have relative broad connectivity, we should be able to declare a TLS profile (or anchor profile) for specific destinations. -- ] Never tell me the odds! | ipv6 mesh networks [ ] Michael Richardson, Sandelman Software Works | IoT architect [ ] mcr@sandelman.ca http://www.sandelman.ca/ | ruby on rails [
- [OPSAWG] Fwd: New Version Notification for draft-… tirumal reddy
- Re: [OPSAWG] New Version Notification for draft-r… tirumal reddy
- Re: [OPSAWG] New Version Notification for draft-r… Michael Richardson
- Re: [OPSAWG] New Version Notification for draft-r… tirumal reddy
- [OPSAWG] how to increase trust in MUD URL Michael Richardson
- Re: [OPSAWG] New Version Notification for draft-r… Michael Richardson
- Re: [OPSAWG] New Version Notification for draft-r… tirumal reddy
- Re: [OPSAWG] New Version Notification for draft-r… Michael Richardson
- Re: [OPSAWG] New Version Notification for draft-r… tirumal reddy