https://scrapbox.io/kou029w/RaspberryPi_Zero_W_%E3%82%92_LTE_Wi-Fi_%E3%83%AB%E3%83%BC%E3%82%BF%E3%83%BC%E3%81%AB%E4%BB%95%E7%AB%8B%E3%81%A6%E4%B8%8A%E3%81%92%E3%82%8B%E3%81%BE%E3%81%A7

.keep

sudo apt install isc-dhcp-server

/etc/dhcp/dhcpd.conf

7,8c7,8
< option domain-name "example.org";
< option domain-name-servers ns1.example.org, ns2.example.org;
---
> option domain-name "raspberrypi.local";
> option domain-name-servers 8.8.8.8, 8.8.4.4;
21c21
< #authoritative;
---
> authoritative;
107a108,113
>
> subnet 192.168.0.0 netmask 255.255.255.0 {
>   range 192.168.0.10 192.168.0.50;
>   option broadcast-address 192.168.0.255;
>   option routers 192.168.0.1;
> }

/etc/default/isc-dhcp-server

17,18c17,18
< INTERFACESv4=""
< INTERFACESv6=""
---
> INTERFACESv4="wlan0"
> INTERFACESv6="wlan0"

できたー！

/etc/default/isc-dhcp-server の v6 の有効化と /etc/dhcp/dhcp6.conf にpublic dnsを追加した

ipv6 なんて無効化してやる