错误信息：
audit: type=1400 audit(1715845314.732:46): apparmor="DENIED" operation="open" profile="/{,usr/fw/softether/client/seclient_dhcp.conf
解决办法：
在 /etc/apparmor.d/sbin.dhclient 里加入 “/usr/fw/softether/client/seclient_dhcp.conf r,”
systemctl restart apparmor
参考：
https://askubuntu.com/questions/1311227/why-does-apparmor-kill-dhclient
