branch office 2

Create another IPsec policy for direct Internet traffic from the headquarters LAN to the Internet, such as web browsing.

create ipsec pol=internet int=ppp0 ac=permit

Note: The order of the IPsec policies is important. The Internet permit policy must be last.

Create your ISAKMP pre-shared key. This key is used when initiating your VPN during phase one ISAKMP exchanges with your VPN peers. Share the value of this pre-shared key with all VPN peers that use it—in this example, the headquarters router. The router only uses this key during phase one ISAKMP exchanges.

create enco key=1 type=general value=<alphanumeric-preshared-key>

Enable ISAKMP.

enable isakmp

Create an ISAKMP policy for the VPN to headquarters. Use ISAKMP heartbeats, which allow ISAKMP to clear SAs if either end of the link resets.

create isakmp pol=hq pe=200.200.200.1 sendd=true key=1 heart=both localid=branch2 encalg=3des2key

9. Configure the firewall’s basic settings

Enable the firewall and create a firewall policy.

enable firewall

create firewall policy=branch2

enable firewall policy=branch2 icmp_f=all

Specify the LAN-facing interface of the router as a private (trusted) interface on the firewall.

add firewall policy=branch2 int=vlan1 type=private

Specify the Internet-facing interface of the router as a public (not trusted) interface on the firewall.

add firewall policy=branch2 int=ppp0 type=public

Define a NAT definition to use when traffic from the local LAN accesses the Internet.

add firewall policy=branch2 nat=enhanced int=vlan1 gblin=ppp0

10. Configure the firewall’s access rules

Create a rule to allow incoming ISAKMP negotiation messages to pass through the firewall. This rule specifies 0.0.0.0 as the global IP address because the PPP address of branch office 2 is dynamically assigned. The rule uses the LAN address to identify matching traffic.

add firewall policy=branch2 ru=1 ac=allo int=ppp0 prot=udp po=500 ip=192.168.142.254 gblip=0.0.0.0 gblp=500

Page 28 AlliedWare™ OS How To Note: VPNs for Corporate Networks

Page 28
Image 28
Allied Telesis AR440S manual Enable isakmp

AR440S specifications

Allied Telesis offers a range of advanced routers designed to meet the connectivity and operational needs of modern enterprises. Among its extensive lineup, the AR450S, AR441S, AR415S, AR442S, and AR440S models stand out for their robust features and technologies, making them ideal solutions for various networking environments.

The Allied Telesis AR450S is a high-performance router tailored for service providers and large enterprises. It supports advanced routing protocols, including IPv4 and IPv6, ensuring compatibility with both legacy and modern networks. The AR450S boasts substantial throughput capabilities, making it suitable for bandwidth-intensive applications. Its versatile WAN options, including Ethernet and cellular connectivity, allow seamless integration into diverse network architectures.

Next in the lineup is the AR441S, which focuses on providing enhanced security and reliability. With built-in firewall capabilities and VPN support, this model ensures secure communication over the internet. The AR441S also features numerous Ethernet ports for flexible connectivity, enabling organizations to scale their networks as needed. Its user-friendly interface facilitates straightforward configuration and management.

The AR415S is designed for branch offices and small to medium-sized enterprises. This router offers a balance of performance and affordability, equipped with essential features like Quality of Service (QoS) and traffic shaping. The AR415S supports multiple WAN connections, which helps in maintaining reliable internet access by auto-failing to backup connections when necessary.

The AR442S incorporates advanced networking technologies, including dynamic routing protocols and deep packet inspection. This model enhances performance by optimizing traffic flow and improving bandwidth utilization. Its support for VoIP and other multimedia applications makes it an excellent choice for organizations seeking to maximize their communication capabilities.

Lastly, the AR440S is engineered for high availability and redundancy. It includes dual power supplies and hot-swappable components, ensuring that network services remain uninterrupted during maintenance. The AR440S is particularly valuable in mission-critical environments where downtime can lead to significant business disruption.

In summary, the Allied Telesis AR series routers—AR450S, AR441S, AR415S, AR442S, and AR440S—offer a rich set of features tailored to various operational needs. With their advanced routing capabilities, security features, and reliable performance, these routers represent the cutting edge of networking technology for businesses looking to enhance their connectivity and operational efficiency.