华为防火墙VPN

interface GigabitEthernet0/0/0

 ip address 192.168.1.10 255.255.255.0

interface GigabitEthernet0/0/1

 ip address 202.100.1.10 255.255.255.0

firewall zone trust

 add interface GigabitEthernet0/0/0

firewall zone untrust

 add interface GigabitEthernet0/0/1

interface Virtual-Template1

 ppp authentication-mode chap

 alias Virtual-Template1

 ip address 172.16.1.1 255.255.255.0

 remote address pool 1

policy interzone local untrust inbound

 policy 0

 action permit                               

aaa

 local-user l2tpuser password cipherhuawei123

 ip pool 1 172.16.1.10 172.16.1.80                            

l2tp-group 1

 allow l2tp virtual-template 1 remotel2tp_tunnel

 tunnel password cipher huawei123

 tunnel name LNS