Alex wrote on 9/26/2018 11:52 AM:
This is all now running on a 165/35 cable system.
Early in this thread or another, I provided a packet trace that showed what appears to me to never have received the replies - it just times out.
It looks like there are periods of as many as 500 queries per second, although the usual amount is closer to 200 per second.
DOCSIS cable systems use an upstream request/grant system to avoid collisions (they act as a hub where only one cable modem in the node can transmit at the same time). This leads to low pps rates compared with ethernet. Even a 10M ethernet connection (1k-10k pps) will outperform a 1gig cable connection (a few hundred pps).
Based on the info you've provided, I suspect that you may be running into this limit. As another poster suggested, you might consider moving your DNS server to a VPS hosted on an ethernet connection at a location more suited for DNS server operation or otherwise try to leverage your upstream provider's DNS or an outside DNS server.
--Blake _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
