Allied Telesis VPN instruction

Configuring the router > The configuration script

#Firewall enable fire

create fire poli=main

create fire poli=main dy=dynamic

add fire poli=main dy=dynamic user=ANY add fire poli=main int=vlan1 type=private

#Dynamic private interfaces are accepted from L2TP, which are from

#IPSec only.

add fire poli=main int=dyn-dynamic type=private add fire poli=main int=eth0 type=public

#The firewall allows for internally generated access to the Internet

#through the following NAT definition.

add fire poli=main nat=enhanced int=vlan1 gblint=eth0

#This NAT definition allows Internet access for remote VPN users by

#providing address translation.

add fire poli=main nat=enhanced int=dyn-dynamic gblint=eth0 add fire poli=main rule=1 int=eth0 action=allow prot=udp

ip=<office-Internet-address> port=500 gblip=<office-Internet-address> gblpo=500

#Rule 2 becomes the L2TP tunnel allow rule. Additional security is

#provided by only allowing traffic from IPSec tunnels.

add fire poli=main rule=2 int=eth0 action=allow prot=udp ip=<office-Internet-address> port=1701 gblip=<office-Internet-address> gblpo=1701 encap=ipsec

create ipsec sas=1 key=isakmp prot=esp encalg=3desouter hashalg=sha mode=transport

create ipsec sas=2 key=isakmp prot=esp encalg=3desouter hashalg=md5 mode=transport

create ipsec sas=3 key=isakmp prot=esp encalg=des hashalg=sha mode=transport

create ipsec sas=4 key=isakmp prot=esp encalg=des hashalg=md5 mode=transport

#The ORDER of proposals is important. You should propose the strongest

#encryption first.

create ipsec bundle=1 key=isakmp string=”1 or 2 or 3 or 4”

create ipsec policy=isakmp int=eth0 action=permit lport=500 rport=500

#This is a generic IPSec policy that multiple IPSec remote PC clients

#can connect through.

create ipsec policy=to_HQ int=eth0 action=ipsec key=isakmp bundle=1 peer=any isa=keys

set ipsec policy=to_HQ transport=udp rport=1701

#The following policy allows for internally generated Internet access. create ipsec policy=Internet int=eth0 act=permit

enable ipsec

create isakmp policy=keys peer=any key=1 set isakmp policy=keys sendd=true enable isakmp

Page 6 AlliedWare™ OS How To Note: VPNs with Windows 2000 clients, without NAT-T

VPN specifications

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