I have a BIND 9.16.3 server running as master for a couple of zones and forwarding queries to my ISP (and 8.8.8.8 / 8.8.4.4 etc...) for other queries. It "works" ok but I notice weird delays in web browsing clients where the browser says "Resolving host...", hangs for a bit (noticeably, ~a few seconds), then loads the whole page.
In the server logs, I see lots of messages like this one: Jun 16 17:21:04 <daemon.info> wannabe named[6982]: timed out resolving ' > trafficmanager.net/DS/IN': 8.8.4.4#53 > Jun 16 17:21:05 <daemon.info> wannabe named[6982]: timed out resolving ' > apiv4-east.myq-cloud.com/AAAA/IN': 8.8.4.4#53 However when I dig from the command line, I can't replicate this. The query comes back quickly and successfully: > # *dig @8.8.4.4 <http://8.8.4.4> apiv4-east.myq-cloud.com > <http://apiv4-east.myq-cloud.com>* > ; <<>> DiG 9.16.3 <<>> @8.8.4.4 apiv4-east.myq-cloud.com > ; (1 server found) > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52825 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 > ;; OPT PSEUDOSECTION: > ; EDNS: version: 0, flags:; udp: 512 > ;; QUESTION SECTION: > ;apiv4-east.myq-cloud.com. IN A > ;; ANSWER SECTION: > apiv4-east.myq-cloud.com. 4 IN A 40.71.236.219 > ;; Query time: *42 msec* > ;; SERVER: 8.8.4.4#53(8.8.4.4) > ;; WHEN: Tue Jun 16 17:22:17 PDT 2020 > ;; MSG SIZE rcvd: 69 It almost feels like something in between me and the next nameserver is dropping packets when a lot of queries are in flight at the same time. I've looked at my router logs and it doesn't seem to be the culprit. When I run tcpdump, though, I definitely see queries that do not return and are tried at another DNS server. Can anyone advise me how to troubleshoot this further, please? Thx, Scott
_______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
