Our Technical Support is reporting a big jump in Outlook connectivity issues about 5-10 minutes ago. Our resolvers are testing fine. -- Thanks, Joe
On Thu, May 2, 2013 at 4:53 AM, Joe Abley <jab...@hopcount.ca> wrote: > > On 2013-05-02, at 02:42, Cathy Almond <cat...@isc.org> wrote: > > > This may be a red herring, but I've heard of some dropping of DNS > > queries for the names within outlook.com domains where the queries are > > all coming from source port 53 (i.e. your recursive server doesn't use > > query source port randomization > > ... or there's a NAT or some other box in front of the recursive server > which re-writes the source port... > > > ). Might be worth checking what the > > recursive server you're using is doing? > > > > See https://www.dns-oarc.net/oarc/services/porttest > > > Joe >
