By default, dnsmasq send a query to all the upstream servers over 50 queries or every 20 seconds. If you're testing and doing queries slowly, the 20 second rule can make it look like _every_ query gets broadcast.
If this is a problem, you can edit src/config.h and recompile. #define FORWARD_TEST 50 /* try all servers every 50 queries */ #define FORWARD_TIME 20 /* or 20 seconds */ Cheers, Simon. On 10/12/2019 16:41, John Siu wrote: > You will need "log-queries=extra" in config to see it. Then use > nslookup/dig to different domains. > > On Tue, Dec 10, 2019 at 11:35 AM John Siu <john.sd....@gmail.com> wrote: >> >> I see it doing it for every single request. >> >> On Tue, Dec 10, 2019 at 11:12 AM Simon Rettberg >> <simon.rettb...@rz.uni-freiburg.de> wrote: >>> >>> Am Mon, 9 Dec 2019 11:58:22 -0500 >>> schrieb John Siu <john.sd....@gmail.com>: >>> >>> dnsmasq sends queries to all servers occasionally to determine which >>> one replies fastest, and then keeps using that one exclusively for a >>> while. Do you see every single query sent to all servers, or just the >>> first one after restarting dnsmasq? >>> >>> - Simon >>> >>>> OS: Ubuntu 18.04 with all updates >>>> dnsmasq version: 2.79-1 >>>> >>>> According to man page: >>>> >>>> --all-servers >>>> By default, when dnsmasq has more than one upstream server >>>> available, it will send queries to just one server. Setting this flag >>>> forces dnsmasq to send all queries to all available servers. The >>>> reply from the server which answers first will be returned to the >>>> original requester. >>>> >>>> I don't have that flag in command line or in the config file. However >>>> with "log-queries=extra" in config file, I am seeing following: >>>> >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 query[A] >>>> news.com from 10.10.10.101 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 2001:1998:f00:2::1 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 2001:1998:f00:1::1 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 2606:4700:4700::1001 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 2606:4700:4700::1111 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 2001:4860:4860::8844 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 2001:4860:4860::8888 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 209.18.47.63 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 209.18.47.62 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 209.18.47.61 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 1.0.0.1 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 1.1.1.1 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 8.8.4.4 >>>> Dec 09 11:29:24 door dnsmasq[9403]: 3640 10.10.10.101/49351 forwarded >>>> news.com to 8.8.8.8 >>>> Dec 09 11:29:25 door dnsmasq[9403]: 3640 10.10.10.101/49351 reply >>>> news.com is 35.190.79.82 >>>> >>>> Is --all-servers behavior changed to default on? Is there a way to >>>> revert it? >>>> >>>> Thank you! >>>> >>>> John Siu >>> > > _______________________________________________ > Dnsmasq-discuss mailing list > Dnsmasq-discuss@lists.thekelleys.org.uk > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss > _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
