[OpenWrt Wiki] DDNS client configuration
openwrt.org › docs › guide-userSep 06, 2021 · Since CC 15.05 disable(0) / enable(1) DNS requests via TCP protocol. By default every DNS call is made via UDP protocol. Some internet provider offer modems, caching UDP DNS requests. They redirect every request to external servers to local modem cache. To force the usage of TCP for DNS requests enable this option. Needs BIND host package to be installed. proxy