WRT1900ACv1 has intermittent interruption on domain resolving

Installing and Using OpenWrt Network and Wireless Configuration
1

The question is that the result sometimes gets bad address,sometimes gets a long interruption when I ping a domain both on the router and client terminal.

Model Linksys WRT1900AC
Architecture ARMv7 Processor rev 2 (v7l)
Firmware Version OpenWrt 18.06.2 r7676-cddd7b4c77 / LuCI openwrt-18.06 branch (git-19.020.41695-6f6641d)
Kernel Version 4.14.95

uci show //below is the section not all

dhcp.@dnsmasq[0]=dnsmasq
dhcp.@dnsmasq[0].domainneeded='1'
dhcp.@dnsmasq[0].localise_queries='1'
dhcp.@dnsmasq[0].rebind_protection='1'
dhcp.@dnsmasq[0].rebind_localhost='1'
dhcp.@dnsmasq[0].local='/lan/'
dhcp.@dnsmasq[0].domain='lan'
dhcp.@dnsmasq[0].expandhosts='1'
dhcp.@dnsmasq[0].authoritative='1'
dhcp.@dnsmasq[0].readethers='1'
dhcp.@dnsmasq[0].leasefile='/tmp/dhcp.leases'
dhcp.@dnsmasq[0].nonwildcard='1'
dhcp.@dnsmasq[0].localservice='1'
dhcp.@dnsmasq[0].resolvfile='/tmp/resolv.conf.auto'
dhcp.@dnsmasq[0].server='8.8.8.8' '8.8.4.4'
dhcp.lan=dhcp
dhcp.lan.interface='lan'
dhcp.lan.start='100'
dhcp.lan.limit='150'
dhcp.lan.leasetime='12h'
dhcp.lan.dhcpv6='server'
dhcp.lan.ra='server'
dhcp.lan.dhcp_option='6,8.8.8.8,8.8.4.4'
network.lan=interface
network.lan.type='bridge'
network.lan.ifname='eth0.1'
network.lan.proto='static'
network.lan.ipaddr='192.168.1.1'
network.lan.netmask='255.255.255.0'
network.lan.ip6assign='60'
network.wan=interface
network.wan.ifname='eth1.2'
network.wan.proto='dhcp'
network.wan.peerdns='0'
network.wan.dns='114.114.114.114'
network.wan6=interface
network.wan6.ifname='eth1.2'
network.wan6.proto='dhcpv6'
network.wan6.peerdns='0'
2

You should stick to one method and use one DNS provider, otherwise the result is always uncertain due to a race condition.

uci -q delete dhcp.@dnsmasq[0].server
uci -q delete dhcp.lan.dhcp_option
uci commit dhcp
service dnsmasq restart

This address belongs to a country known for traffic filtering and internet censorship.

If you live in such a counrty, you should utilize DNS encryption or even VPN.

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