On Fri, Nov 06, 2020 at 05:07:26AM -0500, Dovid Bender wrote:
Sorry if this is a bit OT. Recently several different vendors (in completely different fields) where they white label for us asked us to remove A records that we have going to them and replace them with CNAME records. Is there anything *going around* in the security aranea that has caused this?
The closest thing to a *security* issue I can think of is IP agility in the face of DDoS attacks -- most booter-style attacks are dumb as rocks, and null-routing the target IP and moving all the customers on that IP to another one is the easiest solution. However, there are many *other* great reasons to get customers to CNAME onto their SaaS vendors, including: * No need to coordinate routine renumbering events; * IPv6 support; * CAA record (SSL cert issuance) support; and * no doubt a bunch of other reasons I've forgotten for the moment. Basically, if you sign up for a SaaS that uses your own domain and they *don't* give you a CNAME target to point at, I'd be very cautious, because they're either *very* new to the game, or they're probably also operationally deficient in a lot of other areas, too. - Matt