On Wed, Mar 30, 2022 at 10:57:38PM +0000, Edward McGuire wrote: > Dnsmasq 2.86 > Slackware Linux 15.0 > > This dnsmasq server provides DNS and DHCP service to a local network > of about 150 devices. My problem emerges when I uncomment the first > line of /etc/resolv.conf: > > #nameserver 127.0.0.1 > nameserver [ISP ip redacted] > nameserver [ISP ip redacted] > > For 10 or 20 minutes after the edit, > dnsmasq continues to operate perfectly.
Most likely due cache content considered valid. > Then all client queries begin to time out. Dnsmasq cache content expired. > If I comment out the line again, the problem immediately disappears. > > The problem is reliably reproducible. if I uncomment the line again, > dnsmasq again operates perfectly for some time, then all client queries > begin to time out again. > > In /etc/dnsmasq.conf I have option "no-resolv" set. So it mystifies > me that dnsmasq behavior would be affected by changes to resolv.conf. > > Not seeing any error messages logged. What I do see is the rate of all > activities logged slows to a crawl. I get about two messages per minute > where the normal rate is hundreds per minute. Here's an example with > "log-dhcp" turned on: > > Mar 30 17:33:40 slack dnsmasq-dhcp[946]: 940533162 next server: [ip redacted] > Mar 30 17:34:05 slack dnsmasq-dhcp[946]: 940533162 sent size: 1 option: 53 > message-type 5 > Mar 30 17:34:40 slack dnsmasq-dhcp[946]: 940533162 sent size: 4 option: 54 > server-identifier [ip redacted] > Mar 30 17:35:16 slack dnsmasq-dhcp[946]: 940533162 sent size: 4 option: 28 > broadcast [ip redacted] > Mar 30 17:35:52 slack dnsmasq-dhcp[946]: 940533162 sent size: 4 option: 3 > router [ip redacted] > Mar 30 17:36:22 slack dnsmasq-dhcp[946]: 940533162 sent size: 4 option: 1 > netmask [ip redacted] > Mar 30 17:36:52 slack dnsmasq-dhcp[946]: 940533162 sent size: 12 option: 6 > dns-server [local ip redacted], [ISP ip redacted], [ISP ip redacted] > > These log entries show a single DHCP response taking the daemon several > MINUTES to complete! So something is blocking dnsmasq pretty badly. s/something is blocking dnsmasq/something is blocking name resolving/ > This is my first attempt at a dnsmasq installation. So my fear is > I've made a clueless error and just don't know enough to recognize > it. Any ideas? dig @[ISP ip redacted] dnsmasq.org > Cheers > Edward Groeten Geert Stappers -- Silence is hard to parse _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
