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dockerignore gitignore gitignore dockerfile dockerfile compose yml compose yml dnsmasq conf dnsmasq conf entrypoint sh entrypoint sh license md license md readme md readme md view all files repository files navigation readme mit license more items dnsmasq docker container of dnsmasq an open source dns server features provides a lightweight dns dhcp server forwards dns queries to upstream resolvers supports local hostname and domain resolution supports dhcp leases and static reservations supports custom dns records and hosts files allows custom dnsmasq conf configuration lightweight alpine based image usage docker compose services dnsmasq image dockurr dnsmasq container_name dnsmasq environment dns1 1 0 0 1 dns2 1 1 1 1 ports 53 53 udp 53 53 tcp cap_add net_raw net_admin restart always docker cli docker run it rm name dnsmasq p 53 53 udp p 53 53 tcp e dns1 1 0 0 1 e dns2 1 1 1 1 cap add net_admin docker io dockurr dnsmasq configuration ️ you can set the dns1 and dns2 environment variables to change which upstream dns servers to use for example you can set them to the public cloudflare servers like this environment dns1 1 0 0 1 dns2 1 1 1 1 you can extend the default configuration with a volume that mounts a directory containing conf configuration files volumes dnsmasq d etc dnsmasq d you can also override dnsmasq conf completely with a volume that binds your custom configuration file volumes dnsmasq conf etc dnsmasq conf faq port 53 is already in use if some process on the host is already binding to port 53 you may see an error similar to the following error response from daemon driver failed programming external connectivity on endpoint dnsmasq error starting userland proxy listen tcp4 0 0 0 0 53 bind address already in use you can inspect which process is binding to that port netstat lnpt grep e 53 tcp 0 0 127 0 0 53 53 0 0 0 0 listen 197 systemd resolve on hosts running systemd such as in this example you can workaround this by specifying the ip addresses on which to bind port 53 for example ports 192 168 1 53 53 udp 192 168 1 53 53 tcp there are many other host specific cases where some process and configuration binds port 53 it may be an unused dns daemon such as bind that needs to be uninstalled or disabled or a number of other causes so finding out which process is binding the port is a good place to start debugging stars about dnsmasq in a docker container topics dns docker container docker image dnsmasq dhcp server dns server dnsmasq server resources readme license mit license uh oh there was an error while loading please reload this page activity custom properties stars 154 stars watchers 3 watching forks 23 forks report repository packages 0 uh oh there was an error while loading please reload this page uh oh there was an error while loading please reload this page contributors uh oh there was an error while loading please reload this page languages shell 65 8 dockerfile 34 2 footer 2026 github inc footer navigation terms 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