Re: Benjamin Kaduk's Discuss on draft-ietf-bfd-yang-16: (with DISCUSS and COMMENT)

2018-07-11 Thread Jeffrey Haas
Benjamin, On Wed, Jul 11, 2018 at 10:02:41AM -0500, Benjamin Kaduk wrote: > "may be overkill in some circumstances" sounds exactly like an RFC 2119 > SHOULD, does it not? Putting it slightly a different way, I am always wary of trying to embed too much operational and security wisdom in documents

Re: Benjamin Kaduk's Discuss on draft-ietf-bfd-yang-16: (with DISCUSS and COMMENT)

2018-07-11 Thread Benjamin Kaduk
"may be overkill in some circumstances" sounds exactly like an RFC 2119 SHOULD, does it not? Anyway, we seem to be converging on what I was intending to ask for (thanks, Reshad!), namely that when evaluating the security considerations for configuring the BFD module, the security considerations of

Re: Benjamin Kaduk's Discuss on draft-ietf-bfd-yang-16: (with DISCUSS and COMMENT)

2018-07-11 Thread Reshad Rahman (rrahman)
Jeff, which part do you consider overkill? Is it the statement "NACM rules on IGP BFD configuration be at least as strict as BFD since the IGPs are instantiated BFD sessions"? That should still allow "permit BFD to be de-configured for protocols without also giving operators permission to simil

Re: Benjamin Kaduk's Discuss on draft-ietf-bfd-yang-16: (with DISCUSS and COMMENT)

2018-07-11 Thread Jeffrey Haas
Even that may be overkill in some circumstances. Consider the case where an operator may decide that they'll permit BFD to be de-configured for protocols without also giving operators permission to similarly de-configure the underlying client protocols. Examples of this may be that BFD is expe

Re: Benjamin Kaduk's Discuss on draft-ietf-bfd-yang-16: (with DISCUSS and COMMENT)

2018-07-11 Thread Reshad Rahman (rrahman)
Hi Acee, That and a statement saying the BFD clients should be authenticated. Regards, Reshad. On 2018-07-11, 10:10 AM, "Acee Lindem (acee)" wrote: Hi Reshad, Ok - so are you saying that all that is being asked for is that the NACM rules on IGP BFD configuration be at least as

Re: Benjamin Kaduk's Discuss on draft-ietf-bfd-yang-16: (with DISCUSS and COMMENT)

2018-07-11 Thread Acee Lindem (acee)
Hi Reshad, Ok - so are you saying that all that is being asked for is that the NACM rules on IGP BFD configuration be at least as strict as BFD since the IGPs are instantiated BFD sessions? I'd be ok with that. Thanks, Acee On 7/11/18, 9:25 AM, "Reshad Rahman (rrahman)" wrote: Hi,

Re: Benjamin Kaduk's Discuss on draft-ietf-bfd-yang-16: (with DISCUSS and COMMENT)

2018-07-11 Thread Reshad Rahman (rrahman)
Hi, My read on the DISCUSS is not just wrt spoofing of BFD clients but also making sure that the proper access restriction (NACM) is used for the BFD clients. I didn't interpret Benjamin's comments as requiring a security boundary between BFD clients (BGP, IPGPs) and BFD running on the same dv