Cheatsheet to a more maintainable configuration.
Example: LAN-Only Network
To do this, provide no router (gateway) and dns-server.
In the config file, add
dhcp-option=3 dhcp-option=6
or
dhcp-option=option:router dhcp-option=option:dns-server
IPv4 Options
# dnsmasq --help dhcp Known DHCP options: 1 netmask 2 time-offset 3 router 6 dns-server 7 log-server 9 lpr-server 13 boot-file-size 15 domain-name 16 swap-server 17 root-path 18 extension-path 19 ip-forward-enable 20 non-local-source-routing 21 policy-filter 22 max-datagram-reassembly 23 default-ttl 26 mtu 27 all-subnets-local 31 router-discovery 32 router-solicitation 33 static-route 34 trailer-encapsulation 35 arp-timeout 36 ethernet-encap 37 tcp-ttl 38 tcp-keepalive 40 nis-domain 41 nis-server 42 ntp-server 44 netbios-ns 45 netbios-dd 46 netbios-nodetype 47 netbios-scope 48 x-windows-fs 49 x-windows-dm 58 T1 59 T2 60 vendor-class 64 nis+-domain 65 nis+-server 66 tftp-server 67 bootfile-name 68 mobile-ip-home 69 smtp-server 70 pop3-server 71 nntp-server 74 irc-server 77 user-class 80 rapid-commit 93 client-arch 94 client-interface-id 97 client-machine-id 119 domain-search 120 sip-server 121 classless-static-route 125 vendor-id-encap 150 tftp-server-address 255 server-ip-address #
IPv6 Options
# dnsmasq --help dhcp6 Known DHCPv6 options: 21 sip-server-domain 22 sip-server 23 dns-server 24 domain-search 27 nis-server 28 nis+-server 29 nis-domain 30 nis+-domain 31 sntp-server 32 information-refresh-time 56 ntp-server 59 bootfile-url 60 bootfile-param #