We are once again seeing a significant regional DNS outage causing Web SDK clients to fail to join meetings.
Starting at 2023/04/08 02:29:37 UTC, we started to see a large number of websocket connection errors due to the Web SDK attempting to connect to invalid DNS domains provided to it by the internal Zoom meeting info API:
WebSocket connection to 'wss://zoomiad29rwg.iad.zoom.us/wc/api/XXX...' failed: Error in connection establishment: net::ERR_NAME_NOT_RESOLVED
We’ve seen sustained failures on the following domains:
- zoomiad49rwg.iad.zoom.us
- zoomiad31rwg.iad.zoom.us
- zoomiad30rwg.iad.zoom.us
- zoomiad47rwg.iad.zoom.us
- zoomiad152rwg.iad.zoom.us
- zoomiad64rwg.iad.zoom.us
- zoomiad45rwg.iad.zoom.us
- zoomiad50rwg.iad.zoom.us
- zoomiad146rwg.iad.zoom.us
- zoomiad22rwg.iad.zoom.us
- zoomiad133rwg.iad.zoom.us
- zoomiad14rwg.iad.zoom.us
- zoomiad144rwg.iad.zoom.us
- zoomiad140rwg.iad.zoom.us
- zoomiad52rwg.iad.zoom.us
- zoomiad21rwg.iad.zoom.us
- zoomiad62rwg.iad.zoom.us
- zoomiad43rwg.iad.zoom.us
- zoomiad156rwg.iad.zoom.us
- zoomiad56rwg.iad.zoom.us
- zoomiad51rwg.iad.zoom.us
- zoomiad155rwg.iad.zoom.us
- zoomiad35rwg.iad.zoom.us
- zoomiad130rwg.iad.zoom.us
- zoomiad148rwg.iad.zoom.us
- zoomiad26rwg.iad.zoom.us
- zoomiad16rwg.iad.zoom.us
- zoomiad40rwg.iad.zoom.us
- zoomiad37rwg.iad.zoom.us
- zoomiad131rwg.iad.zoom.us
- zoomiad28rwg.iad.zoom.us
- zoomiad58rwg.iad.zoom.us
- zoomiad137rwg.iad.zoom.us
- zoomiad15rwg.iad.zoom.us
- zoomiad42rwg.iad.zoom.us
- zoomiad3rwg.iad.zoom.us
- zoomiad136rwg.iad.zoom.us
- zoomiad48rwg.iad.zoom.us
- zoomiad54rwg.iad.zoom.us
- zoomiad17rwg.iad.zoom.us
- zoomiad20rwg.iad.zoom.us
- zoomiad134rwg.iad.zoom.us
- zoomiad39rwg.iad.zoom.us
- zoomiad142rwg.iad.zoom.us
- zoomiad132rwg.iad.zoom.us
- zoomiad25rwg.iad.zoom.us
- zoomiad154rwg.iad.zoom.us
- zoomiad36rwg.iad.zoom.us
- zoomiad57rwg.iad.zoom.us
- zoomiad33rwg.iad.zoom.us
- zoomiad158rwg.iad.zoom.us
- zoomiad46rwg.iad.zoom.us
- zoomiad149rwg.iad.zoom.us
- zoomiad19rwg.iad.zoom.us
- zoomiad27rwg.iad.zoom.us
- zoomiad34rwg.iad.zoom.us
- zoomiad32rwg.iad.zoom.us
- zoomiad24rwg.iad.zoom.us
- zoomiad135rwg.iad.zoom.us
- zoomiad41rwg.iad.zoom.us
- zoomiad151rwg.iad.zoom.us
- zoomiad18rwg.iad.zoom.us
- zoomiad29rwg.iad.zoom.us
- zoomiad38rwg.iad.zoom.us
- zoomiad59rwg.iad.zoom.us
- zoomiad63rwg.iad.zoom.us
- zoomiad60rwg.iad.zoom.us
- zoomiad61rwg.iad.zoom.us
- zoomiad147rwg.iad.zoom.us
- zoomiad55rwg.iad.zoom.us
Given the size of this list I suspect it’s a near total DNS outage for domains in the IAD region.
As with last time, all of these domains are missing the expected A records:
dig +short zoomiad55rwg.iad.zoom.us A
This is a major outage causing near total failure for this region.