On Wed, Apr 20, 2022 at 07:38:52AM -0700, Tom Keddie via Dnsmasq-discuss wrote: > Hi All, > > We've been trying to track down some connectivity issues on unreleased > firmware for some of the openwrt based routers we sell
Welcome to this mailinglist. > and have narrowed it to a dns issue. I do read that as a _possible_ DNS issue. ;-) > We're seeing dnsmasq 2.86 stop reading from one of its sockets after a > variable period of time with many (~45) clients. We also saw this problem > with dnsmasq 2.85 but on the single socket it opens. > > Upstream dns still works as does resolution on 127.0.0.1 but resolution on > the bridged lan interface, 192.168.1.1, is backed up and not responding. > > We do see some topology change events on the bridge but the interface has > been up since first boot and still responds to ping. > > Any suggestions are welcome. I do read that as "You have my awareness that I aim for win-win" > I did go through the pending commits for 2.87 > but didn't see anything relevant. > I've included everything that I think might be useful here. It lacks the "why". I'll try to explain what I mean / miss > Thanks, > Tom Keddie > > root:~# netstat -anu I see the `netstat -anu`, but I don't see why this command and neither why this command as first. > Active Internet connections (servers and established) > Proto Recv-Q Send-Q Local Address Foreign Address State > udp 0 0 127.0.0.1:50032 0.0.0.0:* > udp 0 0 127.0.0.1:38000 0.0.0.0:* > udp 0 0 127.0.0.1:48000 0.0.0.0:* > udp 0 0 127.0.0.1:37000 0.0.0.0:* > udp 0 0 127.0.0.1:58000 0.0.0.0:* > udp 0 0 0.0.0.0:51376 0.0.0.0:* > udp 0 0 127.0.0.1:58032 0.0.0.0:* > udp 0 0 127.0.0.1:46000 0.0.0.0:* > udp 0 0 127.0.0.1:45000 0.0.0.0:* > udp 0 0 127.0.0.1:44000 0.0.0.0:* > udp 0 0 127.0.0.1:45032 0.0.0.0:* > udp 0 0 127.0.0.1:43000 0.0.0.0:* > udp 0 0 127.0.0.1:44032 0.0.0.0:* > udp 0 0 127.0.0.1:42000 0.0.0.0:* > udp 0 0 127.0.0.1:52000 0.0.0.0:* > udp 0 0 127.0.0.1:42032 0.0.0.0:* > udp 0 0 71.192.91.235:53 0.0.0.0:* > udp 0 0 127.0.0.1:53 0.0.0.0:* > udp 183552 213248 192.168.1.1:53 0.0.0.0:* > udp 0 0 127.0.0.1:51000 0.0.0.0:* > udp 0 0 127.0.0.1:52032 0.0.0.0:* > udp 0 0 0.0.0.0:67 0.0.0.0:* > udp 0 0 127.0.0.1:50000 0.0.0.0:* > > > root:~# nslookup minim.co 75.75.75.75 Showing that 75.75.75.75 is working as DNS (75.75.75.75 is configured as upstream DNS) > Server: 75.75.75.75 > Address: 75.75.75.75:53 > > Non-authoritative answer: > Name: minim.co > Address: 18.215.222.49 > > Non-authoritative answer: > > root:~# nslookup minim.co 75.75.76.76 Showing that 75.75.76.76 is working as DNS (75.75.76.76 is configured as upstream DNS) > Server: 75.75.76.76 > Address: 75.75.76.76:53 > > Non-authoritative answer: > > Non-authoritative answer: > Name: minim.co > Address: 18.215.222.49 > > root:~# nslookup minim.co 127.0.0.1 Showing that 127.0.0.1 is working as DNS > Server: 127.0.0.1 > Address: 127.0.0.1:53 > > Non-authoritative answer: > Name: minim.co > Address: 18.215.222.49 > > Non-authoritative answer: > > root:~# nslookup minim.co 192.168.1.1 The non-working DNS > ;; connection timed out; no servers could be reached > > root:~# ps w | grep dns Probably: dnsmasq is running and the configuration file it is using. > 6268 dnsmasq 2260 S /usr/sbin/dnsmasq -C > /var/etc/dnsmasq.conf.cfg01411c -k -x /var/run/dnsmasq/dnsmasq.cfg01411c.pid > root:~# cat /var/etc/dnsmasq.conf.cfg01411c Show content of configuration file > # auto-generated config file from /etc/config/dhcp > conf-file=/etc/dnsmasq.conf > dhcp-authoritative > domain-needed > localise-queries > read-ethers > enable-ubus=dnsmasq > expand-hosts > bind-dynamic > local-service > edns-packet-max=1232 > domain=lan > local=/lan/ > addn-hosts=/tmp/hosts > dhcp-leasefile=/tmp/dhcp.leases > resolv-file=/tmp/resolv.conf.d/resolv.conf.auto > stop-dns-rebind > rebind-localhost-ok > dhcp-broadcast=tag:needs-broadcast > conf-dir=/tmp/dnsmasq.d > user=dnsmasq > group=dnsmasq > dhcp-host=00:0a:cd:32:6e:e9,192.168.1.193,Multisensor-Database > dhcp-ignore-names=tag:dhcp_bogus_hostname > conf-file=/usr/share/dnsmasq/dhcpbogushostname.conf > bogus-priv > conf-file=/usr/share/dnsmasq/rfc6761.conf > dhcp-range=set:lan,192.168.1.10,192.168.1.254,255.255.255.0,24h > > root:~# cat /tmp/resolv.conf.d/resolv.conf.auto Showing "/etc/resolv.conf" > # Interface wan > nameserver 75.75.75.75 > nameserver 75.75.76.76 > search hsd1.ma.comcast.net. > root:~# cat /tmp/dhcp.leases Might be to back the "many (~45) clients" statement > 1650547228 16:27:11:bd:95:42 192.168.1.208 OnePlus-Nord-N200-5G > 01:16:27:11:bd:95:42 > 1650510491 48:98:ca:9b:e3:cc 192.168.1.157 KNOK 01:48:98:ca:9b:e3:cc > 1650541991 12:0d:6e:11:0e:f1 192.168.1.222 Dennis-s-S21-Ultra > 01:12:0d:6e:11:0e:f1 > 1650535710 72:20:71:2f:c8:2f 192.168.1.123 * 01:72:20:71:2f:c8:2f > 1650533880 26:26:22:df:cb:e3 192.168.1.236 Galaxy-S10 01:26:26:22:df:cb:e3 > 1650535136 00:0a:cd:32:6e:e9 192.168.1.193 Multisensor-Database > 01:00:0a:cd:32:6e:e9 > 1650491917 80:c1:6e:f3:f7:4c 192.168.1.182 * 01:80:c1:6e:f3:f7:4c > 1650534737 a4:83:e7:5a:49:33 192.168.1.99 ZoomDev 01:a4:83:e7:5a:49:33 > 1650534463 6c:94:f8:a1:b4:fb 192.168.1.174 Denniss-iPad 01:6c:94:f8:a1:b4:fb > 1650548813 0c:cb:85:f7:e5:81 192.168.1.62 MH7601 * > 1650490643 0c:cb:85:f7:e5:80 192.168.1.61 * * > 1650548775 0c:cb:85:f7:e5:7d 192.168.1.58 * * > 1650537688 08:5b:d6:81:99:99 192.168.1.155 DESKTOP-QPFCJMS > 01:08:5b:d6:81:99:99 > 1650546045 0a:35:2a:f3:bb:6a 192.168.1.161 Pixel-3-XL 01:0a:35:2a:f3:bb:6a > 1650534279 48:98:ca:2a:5c:d0 192.168.1.206 CORI 01:48:98:ca:2a:5c:d0 > 1650532675 4c:66:41:63:a3:ce 192.168.1.212 Galaxy-S7 01:4c:66:41:63:a3:ce > 1650532683 00:b5:d0:fc:cd:b5 192.168.1.16 Galaxy-Tab-A-2016 > 01:00:b5:d0:fc:cd:b5 > 1650544456 00:51:ed:3b:53:b2 192.168.1.243 LGwebOSTV 01:00:51:ed:3b:53:b2 > 1650547147 40:06:a0:a7:dc:a4 192.168.1.41 4006A0A7DCA4-mysimplelink * > 1650545297 34:20:03:ed:e2:e3 192.168.1.190 * * > 1650546997 5c:f3:70:26:7b:3f 192.168.1.30 DESKTOP-R3VI2U2 01:5c:f3:70:26:7b:3f > 1650490270 0c:cb:85:f7:e5:7c 192.168.1.57 * * > 1650546786 34:97:f6:b6:9b:01 192.168.1.127 DESKTOP-MVQ4Q7J > 01:34:97:f6:b6:9b:01 > 1650548017 5c:f3:70:26:7b:67 192.168.1.70 DESKTOP-59AGI93 01:5c:f3:70:26:7b:67 > 1650546628 28:b2:bd:1a:03:06 192.168.1.186 kaplan-laptop 01:28:b2:bd:1a:03:06 > 1650545301 34:20:03:ed:d1:40 192.168.1.84 * * > 1650546024 38:f9:d3:5e:02:e1 192.168.1.165 * 01:38:f9:d3:5e:02:e1 > 1650546052 8c:85:90:4f:35:12 192.168.1.185 DVTs-MBP 01:8c:85:90:4f:35:12 > 1650545303 34:20:03:ed:f1:6f 192.168.1.139 * * > 1650547347 60:dd:8e:d3:d1:6e 192.168.1.211 DVT-Test 01:60:dd:8e:d3:d1:6e > 1650545313 34:20:03:ed:d4:f1 192.168.1.78 * * > 1650545301 34:20:03:ed:ea:22 192.168.1.244 * * > 1650533137 48:43:dd:6b:86:50 192.168.1.221 * * > 1650533886 dc:f5:05:13:2f:51 192.168.1.184 P12100384 01:dc:f5:05:13:2f:51 > 1650545293 34:20:03:ed:8d:7a 192.168.1.125 * * > 1650533065 b0:fc:0d:7a:80:b2 192.168.1.67 amazon-533fd135f > 01:b0:fc:0d:7a:80:b2 > 1650533016 d0:c5:d3:65:17:47 192.168.1.60 C72926881 01:d0:c5:d3:65:17:47 > 1650510564 b4:e6:2d:03:b5:32 192.168.1.130 Etekcity-Outlet * > 1650546031 d4:25:8b:94:c3:de 192.168.1.251 * 01:d4:25:8b:94:c3:de > 1650545211 48:98:ca:f9:3a:d2 192.168.1.252 C58804806 01:48:98:ca:f9:3a:d2 > 1650546123 b8:31:b5:ba:64:c9 192.168.1.18 XBOXONE 01:b8:31:b5:ba:64:c9 > 1650534777 48:98:ca:f4:c2:bf 192.168.1.232 C58213759 01:48:98:ca:f4:c2:bf > 1650533023 bc:d7:d4:32:0f:ea 192.168.1.89 RokuUltra * > 1650541196 60:f8:1d:ab:eb:40 192.168.1.249 build-001 01:60:f8:1d:ab:eb:40 > 1650550011 3c:06:30:3b:74:04 192.168.1.54 MacBook-Pro 01:3c:06:30:3b:74:04 > root:~# ip addr Yes, but why? What are you trying to tell?? As in: What do you expect us to see??? > 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1000 > link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 > inet 127.0.0.1/8 scope host lo > valid_lft forever preferred_lft forever > 2: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop qlen 1000 > link/ether 22:ca:00:55:d9:ee brd ff:ff:ff:ff:ff:ff > 3: ifb0: <BROADCAST,NOARP> mtu 1500 qdisc noop qlen 32 > link/ether ba:84:9c:1e:ec:ac brd ff:ff:ff:ff:ff:ff > 4: ifb1: <BROADCAST,NOARP> mtu 1500 qdisc noop qlen 32 > link/ether 8e:9e:7d:ee:3a:6c brd ff:ff:ff:ff:ff:ff > 5: gre0@NONE: <NOARP> mtu 1476 qdisc noop qlen 1000 > link/gre 0.0.0.0 brd 0.0.0.0 > 6: gretap0@NONE: <BROADCAST,MULTICAST> mtu 1476 qdisc noop qlen 1000 > link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff > 7: erspan0@NONE: <BROADCAST,MULTICAST> mtu 1464 qdisc noop qlen 1000 > link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff > 8: sit0@NONE: <NOARP> mtu 1480 qdisc noop qlen 1000 > link/sit 0.0.0.0 brd 0.0.0.0 > 9: ip6gre0@NONE: <NOARP> mtu 1448 qdisc noop qlen 1000 > link/[823] 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 brd > 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 > 10: archer: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue > link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff > 11: bcmsw: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000 > link/ether 0c:cb:85:f7:e5:a8 brd ff:ff:ff:ff:ff:ff > 12: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen > 1000 > link/ether 0c:cb:85:f7:e5:a9 brd ff:ff:ff:ff:ff:ff > inet 71.192.91.235/22 brd 71.192.91.255 scope global eth0 > valid_lft forever preferred_lft forever > 13: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master > br-lan qlen 1000 > link/ether 0c:cb:85:f7:e5:a8 brd ff:ff:ff:ff:ff:ff > 14: wl0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master > br-lan qlen 1000 > link/ether 0c:cb:85:f7:e5:ab brd ff:ff:ff:ff:ff:ff > 15: wl1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master > br-lan qlen 1000 > link/ether 0c:cb:85:f7:e5:aa brd ff:ff:ff:ff:ff:ff > 18: br-lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue qlen 1000 > link/ether 0c:cb:85:f7:e5:a8 brd ff:ff:ff:ff:ff:ff > inet 192.168.1.1/24 brd 192.168.1.255 scope global br-lan > valid_lft forever preferred_lft forever > 19: wl1.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master > br-lan qlen 1000 > link/ether 72:cb:85:f7:e5:ab brd ff:ff:ff:ff:ff:ff > 29: wds1.1.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast > master br-lan qlen 1000 > link/ether 72:cb:85:f7:e5:ab brd ff:ff:ff:ff:ff:ff > 30: wds1.1.2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast > master br-lan qlen 1000 > link/ether 72:cb:85:f7:e5:ab brd ff:ff:ff:ff:ff:ff > root:~# brctl show Why? > bridge name bridge id STP enabled interfaces > br-lan 7000.0ccb85f7e5a8 yes eth1 > wds1.1.1 > wds1.1.2 > wl0 > wl1 > wl1.1 > root:~# dmesg | grep br-lan Why? > [ 2257.008455] br-lan: port 1(eth1) entered blocking state > [ 2257.013706] br-lan: port 1(eth1) entered listening state > [ 2259.046965] br-lan: port 1(eth1) entered learning state > [ 2261.094953] br-lan: port 1(eth1) entered forwarding state > [ 2261.100376] br-lan: topology change detected, propagating > [ 2271.342450] br-lan: port 1(eth1) entered disabled state > [ 2279.536780] br-lan: port 1(eth1) entered blocking state > [ 2279.542056] br-lan: port 1(eth1) entered listening state > [ 2281.574810] br-lan: port 1(eth1) entered learning state > [ 2283.622807] br-lan: port 1(eth1) entered forwarding state > [ 2283.628240] br-lan: topology change detected, propagating > [ 4835.714957] br-lan: received packet on wl1 with own address as source > address (addr:0c:cb:85:f7:e5:aa, vlan:0) > [ 6689.781276] br-lan: received packet on wl0 with own address as source > address (addr:0c:cb:85:f7:e5:ab, vlan:0) > [10165.333204] br-lan: received packet on wl0 with own address as source > address (addr:0c:cb:85:f7:e5:ab, vlan:0) > [20921.866775] br-lan: port 5(wds1.1.1) entered disabled state > [20921.883309] br-lan: port 5(wds1.1.1) entered disabled state > [20922.512373] br-lan: received packet on wl1 with own address as source > address (addr:0c:cb:85:f7:e5:aa, vlan:0) > [20923.718768] br-lan: port 5(wds1.1.1) entered blocking state > [20923.725229] br-lan: port 5(wds1.1.1) entered disabled state > [20923.737857] br-lan: port 5(wds1.1.1) entered blocking state > [20923.743492] br-lan: port 5(wds1.1.1) entered listening state > [20925.766397] br-lan: port 5(wds1.1.1) entered learning state > [20927.814380] br-lan: port 5(wds1.1.1) entered forwarding state > [20927.820154] br-lan: topology change detected, propagating > [20930.280812] br-lan: port 5(wds1.1.1) received tcn bpdu > [20930.285982] br-lan: topology change detected, propagating > [20948.714635] br-lan: received packet on wl0 with own address as source > address (addr:0c:cb:85:f7:e5:ab, vlan:0) > [26002.362865] br-lan: received packet on wl1 with own address as source > address (addr:0c:cb:85:f7:e5:aa, vlan:0) > [26003.804245] br-lan: port 6(wds1.1.2) entered disabled state > [26003.821039] br-lan: port 6(wds1.1.2) entered disabled state > [26005.660527] br-lan: port 6(wds1.1.2) entered blocking state > [26005.667707] br-lan: port 6(wds1.1.2) entered disabled state > [26005.680231] br-lan: port 6(wds1.1.2) entered blocking state > [26005.685845] br-lan: port 6(wds1.1.2) entered listening state > [26007.703587] br-lan: port 6(wds1.1.2) entered learning state > [26009.751572] br-lan: port 6(wds1.1.2) entered forwarding state > [26009.757342] br-lan: topology change detected, propagating > [26010.603790] br-lan: port 6(wds1.1.2) received tcn bpdu > [26010.608954] br-lan: topology change detected, propagating > [26903.288550] br-lan: received packet on wl1 with own address as source > address (addr:0c:cb:85:f7:e5:aa, vlan:0) > [29308.403115] br-lan: received packet on wl0 with own address as source > address (addr:0c:cb:85:f7:e5:ab, vlan:0) > [44074.437481] br-lan: port 5(wds1.1.1) entered disabled state > [44074.453464] br-lan: port 5(wds1.1.1) entered disabled state > [44075.721563] br-lan: port 5(wds1.1.1) entered blocking state > [44075.727494] br-lan: port 5(wds1.1.1) entered disabled state > [44075.740713] br-lan: port 5(wds1.1.1) entered blocking state > [44075.746331] br-lan: port 5(wds1.1.1) entered listening state > [44077.811280] br-lan: port 5(wds1.1.1) entered learning state > [44079.859259] br-lan: port 5(wds1.1.1) entered forwarding state > [44079.865029] br-lan: topology change detected, propagating > [44082.572293] br-lan: port 5(wds1.1.1) received tcn bpdu > [44082.577454] br-lan: topology change detected, propagating > [44221.999541] br-lan: port 6(wds1.1.2) entered disabled state > [44222.022059] br-lan: port 6(wds1.1.2) entered disabled state > [44223.231419] br-lan: port 6(wds1.1.2) entered blocking state > [44223.237146] br-lan: port 6(wds1.1.2) entered disabled state > [44223.249414] br-lan: port 6(wds1.1.2) entered blocking state > [44223.255030] br-lan: port 6(wds1.1.2) entered listening state > [44225.265897] br-lan: port 6(wds1.1.2) entered learning state > [44227.313875] br-lan: port 6(wds1.1.2) entered forwarding state > [44227.319647] br-lan: topology change detected, propagating > [44228.227914] br-lan: port 6(wds1.1.2) received tcn bpdu > [44228.233077] br-lan: topology change detected, propagating > [44228.625036] br-lan: received packet on wl0 with own address as source > address (addr:0c:cb:85:f7:e5:ab, vlan:0) > [55550.135997] br-lan: received packet on wl1 with own address as source > address (addr:0c:cb:85:f7:e5:aa, vlan:0) > [56437.513600] br-lan: received packet on wl0 with own address as source > address (addr:0c:cb:85:f7:e5:ab, vlan:0) > [56900.600612] br-lan: received packet on wl0 with own address as source > address (addr:0c:cb:85:f7:e5:ab, vlan:0) > [57338.311331] br-lan: received packet on wl0 with own address as source > address (addr:0c:cb:85:f7:e5:ab, vlan:0) > [57399.986991] br-lan: received packet on wl1 with own address as source > address (addr:0c:cb:85:f7:e5:aa, vlan:0) > [57545.345542] br-lan: received packet on wl0 with own address as source > address (addr:0c:cb:85:f7:e5:ab, vlan:0) > [58224.520851] br-lan: received packet on wl0 with own address as source > address (addr:0c:cb:85:f7:e5:ab, vlan:0) > [61335.029068] br-lan: received packet on wl1 with own address as source > address (addr:0c:cb:85:f7:e5:aa, vlan:0) > root:~# ping 192.168.1.1 ping --count 5 192.168.1.1 # to show interface still responds to ping. > PING 192.168.1.1 (192.168.1.1): 56 data bytes > 64 bytes from 192.168.1.1: seq=0 ttl=64 time=0.181 ms > ^C > --- 192.168.1.1 ping statistics --- > 1 packets transmitted, 1 packets received, 0% packet loss > round-trip min/avg/max = 0.181/0.181/0.181 ms Advice for digging deeper: watch 'netstat -anu | grep 192.168.1.1:53' --log-queries=extra 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
