Quick stop wireguard

# 1. Check the ipv6 address

ip -6 addr

ip -6 route

ping6 ipv6.google.com

curl https://ifconfig.co --ipv6

# 2. How to stop it

sudo wg-quick down wgcf

sudo systemctl disable wg-quick@wgcf

# how to start it?

sudo wg-quick up wgcf

# How to modify it

sudo vim /etc/wireguard/wgcf.conf

# 0.0.0.0/0 means ipv4, ::/0 means ipv6

AllowedIPs = 0.0.0.0/0, ::/0