# Mac book m1/m2 用wifi 無法連線vpn 2023/11/27

- 開啟Mac terminal, 輸入以指令
~~~
sudo sysctl net.link.generic.system.hwcksum_tx=0
sudo sysctl net.link.generic.system.hwcksum_rx=0
~~~
MacOS 软件版本是 Monterey 12.1及12.3（最新） 版本之间

https://discussionschinese.apple.com/thread/253307367?page=3
https://discussionschinese.apple.com/thread/253307367?page=4

https://blog.csdn.net/qq_34972627/article/details/127053500
https://blog.csdn.net/xuxingzhuang/article/details/123846050

- MAC M1 , connect to home vpn and office vpn，configuration need changed.
sudo vim /etc/ppp/options
~~~
plugin L2TP.ppp
# if connect to tp office(TSMC) vpn, need mark it. l2tpnoipsec, so if you need switch to home vpn, it need unmark it.
#l2tpnoipsec
~~~