<html><head></head><body><div style="color:#000; background-color:#fff; font-family:lucida console, sans-serif;font-size:16px"><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6569">I have recently setup unbound on CentOS 7 (latest) running version 1.6.6. So far unbound has been chugging away for about a month. In my configuration I have an on premise server configured with lots of internal forwarded domains going to Amazon Route53. As of yesterday unbound started to flip/flop resolution from the internal/private zones to the external zones. I'm not sure why. I have turned up the logging verbosity to see if there was an apparent issue. I though at one point we hit a wall with number of packets per request. My colleague and I thought we hit a resource records maximum limit. We have opened a ticket with Amazon to get more information on their side. </div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6569"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6569">In my config file:</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6569">num-threads: 4 </div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6736">so-rcvbuf: 4m</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6737">so-sndbuf: 4m</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6779">cache-max-negative-ttl: 10</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6815">do-ip4: yes</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6819">do-ip6: yes</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6862">do-udp: yes</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6866">do-tcp: yes</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6866"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6866"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6866">Everything in my zones config file is a forward-zone and not a stub-zone, not sure if that matters.</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6866"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6866">Any help is greatly appreciated.</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6866"><br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6866">Regards,</div><div dir="ltr" id="yui_3_16_0_ym19_1_1540905454428_6866">Andrew</div></div></body></html>