create /etc/init.wsl for below contents
#!/bin/bash
ip addr del $(ip addr show eth0 | grep 'inet ' | awk '{print $2}') dev eth0
ip addr add 192.168.1.xxx/24 dev eth0
# point to your gateway
ip route add default via 192.168.1.xxx dev eth0
# /etc/wsl.conf
[network]
generateResolvConf = false
[boot]
command = /etc/init.wsl
DNS settings:
# /etc/resolv.conf
# change to your dns server or public one
nameserver xxx.xx.x.x