Yes, that would work fine. If it could help convince these routers to implement DHCP guard or RA guard, that would be a great result. I am not so sure about 802.1x. The routers could of course support a setting like that of the IETF network, and that would have some advantage over WPA residential, but it would not address an important threat: local device compromised by some virus and engaging in DHCP spoofing. DHCP guard or RA guard would still be needed. -- Christian Huitema > On Jan 7, 2019, at 2:38 AM, JORDI PALET MARTINEZ <jordi.palet@xxxxxxxxxxxxxx> wrote: > > Hi Christian, > > I've drafted this at the moment. Let me know if you think now this is better and if you think anything else is needed. > > 8. Security Considerations > > The IPv6 Transition CE Router must comply with the Security > Considerations as stated in [RFC7084], as well as those stated by > each transition mechanism implemented by the IPv6 Transition CE > Router. > > As described in [RFC8026] and [RFC8415] Security Consideration > sections, there are generic DHCP security issues, which in the case > of this document means that malicious nodes may alter the priority of > the transition mechanisms. > > Considering that, networks using DHCPv6, depending on their specific > topologies, should consider using authentication mechanisms such as > those based on IEEE-802.1X or access control mechanisms such as DHCP > snooping, DHCP guard, or TR-069, among other possible choices. > > As stated in the introduction, this document addresses deployment of > IPv4aaS in residential, SOHO and SME networks. Deployment in more > challenging environments would require additional security analysis. > > > Regards, > Jordi > > > > -----Mensaje original----- > De: ietf <ietf-bounces@xxxxxxxx> en nombre de JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@xxxxxxxxxxxxxx> > Fecha: lunes, 7 de enero de 2019, 11:17 > Para: Christian Huitema <huitema@xxxxxxxxxxx>, <secdir@xxxxxxxx> > CC: <v6ops@xxxxxxxx>, <ietf@xxxxxxxx> > Asunto: Re: [v6ops] Secdir telechat review of draft-ietf-v6ops-transition-ipv4aas-12 > > Hi Christian, > > Thanks for your review. > > There is a typo there, wrong copy and paste. It should be RFC8415 and RFC8026, as we discussed after your review. > > My point, as discussed in the previous email exchange, is that this is a generic issue of DHCP. DHCP is used by both residential and non-residential service provisioning, and I don't see how we can solve that problem unless we implement some new DHCP "extension" that apply end-to-end encryption between, in this case, the CEs and the servers. > > I can have a security section with basically replicates the text available in RFC8415 Security Section, including considerations of using IEEE-802.1X, DHCP snooping/guard/access control mechanisms, use of TR-069 access control mechanisms, etc. > > I'm also happy to add your suggested paragraph regarding additional security analysis in more challenging environments. > > Or maybe the correction of the RFC8415 references is sufficient in your opinion or you will prefer some additional text to summarize the RFC8415 security considerations/mitigations? > > I'm going to wait a couple of days, in case there are further inputs, before uploading a new version correcting the mistake and also take in considerations the suggestions from the Gen-ART review a couple of days ago. > > Regards, > Jordi > > > > -----Mensaje original----- > De: v6ops <v6ops-bounces@xxxxxxxx> en nombre de Christian Huitema <huitema@xxxxxxxxxxx> > Fecha: lunes, 7 de enero de 2019, 7:28 > Para: <secdir@xxxxxxxx> > CC: <v6ops@xxxxxxxx>, <ietf@xxxxxxxx>, <draft-ietf-v6ops-transition-ipv4aas..all@xxxxxxxx> > Asunto: [v6ops] Secdir telechat review of draft-ietf-v6ops-transition-ipv4aas-12 > > Reviewer: Christian Huitema > Review result: Ready > > I already reviewed the version 11 of this draft. From a security point of view, > the main change between the two versions is the addition of a paragraph > acknowledging the potential risks of relying on DHCP for configuration. To > quote: "As described in [RFC8026] and [RFC8026] Security Consideration > sections, there are generic DHCP security issues, which in the case of this > document means that malicious nodes may alter the priority of the transition > mechanisms." > > Well, on the one hand, this does directly address the point I raised in the > previous review. On the other hand, it is a bit sad to have a dry > acknowledgement like that, without any hint at mitigations. If I was writing an > April's fool RFC, I would qualify that as one of those security sections that > seem written primarily for appeasing the security reviewer. But then, do we > want to give some advice to implementers? For example, do we want to tell them > that it is OK to deploy compliant devices in a basic home network? Probably. In > the branch office of a financial institution? Most probably not. Do we have a > way to convey that in simple terms? I would add something like: > > "As stated in the introduction, this document addresses deployment of IPv4 as a > service in a residential or small-office network. Deployment in more > challenging environments would require additional security analysis.." > > > _______________________________________________ > v6ops mailing list > v6ops@xxxxxxxx > https://www.ietf.org/mailman/listinfo/v6ops > > > > > ********************************************** > IPv4 is over > Are you ready for the new Internet ? > http://www.theipv6company.com > The IPv6 Company > > This electronic message contains information which may be privileged or confidential. 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