1.       设置自动 dhcpd

root@localhost:~# systemctl enable isc-dhcp-server.service

Synchronizing state of isc-dhcp-server.service with SysV service script with

/lib/systemd/systemd-sysv-install.

Executing: /lib/systemd/systemd-sysv-install enable isc-dhcp-server

2.       设置静态 IP：（设置的IP网口为连接电脑的网口）

root@localhost:~# vi /etc/systemd/network/fm1-mac6.network

[Match]

Name=fm1-mac6

KernelCommandLine=!root=/dev/nfs

[Network]

Address=192.168.2.1/24

3.       设置 NAT 打开转发：

root@localhost:~# vi /etc/sysctl.conf

4.      设置转发：

root@localhost:~# iptables -t nat -A POSTROUTING -o enx001e101f0000 -j MASQUERADE

5.      保存 iptables 配置：

root@localhost:~# netfilter-persistent save

run-parts: executing /usr/share/netfilter-persistent/plugins.d/15-ip4tables save

run-parts: executing /usr/share/netfilter-persistent/plugins.d/25-ip6tables save

root@localhost:~# netfilter-persistent reload

run-parts: executing /usr/share/netfilter-persistent/plugins.d/15-ip4tables start

run-parts: executing /usr/share/netfilter-persistent/plugins.d/25-ip6tables start

6.       重启开发板，参考2.9节 5G模块测试，配置使5G模块可以正常上网，然后用网线把板子和电脑连接（电脑设置为DHCP）

7.       此时电脑可以正常上网