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remote security officers (RSOs). RSO definitions specify trusted remote addresses for security officer users.

add user rso ip=<ipadd>[-<ipadd>]

enable user rso

enable telnet server

4. Capture status information remotely, if desired

If desired, set the router to send log messages to a syslog server.

create log output=2 destination=syslog server=<syslog-server-address> syslogformat=extended

add log out=2 filter=1 sev=>3

If desired, you can configure SNMP to inform you or your service provider of network events, such as the LAN interface of the router going down. We recommend SNMPv3 for security reasons. For details, see How To Configure SNMPv3 On Allied Telesis Routers and Managed Layer 3 Switches. This How To Note is available from www.alliedtelesis.com/ resources/literature/howto.aspx.

5. Configure dynamic PPP over L2TP connections

You need to configure dynamic PPP over L2TP to accept incoming Windows VPN client connections.

Create an IP pool to allocate unique internal payload addresses to incoming VPN clients.

create ip pool=roaming ip=192.168.143.1-192.168.143.50

Define a PPP template. This defines authentication and uses the IP pool of addresses.

create ppp template=1

set ppp template=1 bap=off ippool=roaming authentication=chap echo=10 lqr=off

Configure L2TP. When the router successfully negotiates an L2TP tunnel connection from any remote peer, it then creates a PPP interface over that tunnel, using the PPP parameters defined by the PPP template. If you intend to prioritise voice traffic (see page 30), also turn on TOS (type of service) reflection, so that DSCP marked VoIP packets can be classified for prioritisation at the PPP level.

enable l2tp

enable l2tp server=both

add l2tp ip=1.1.1.1-255.255.255.254 ppptemplate=1 tos=on

Add your approved roaming VPN client usernames.

add user=roaming1 pass=roaming1 lo=no telnet=no add user=roaming2 pass=roaming2 lo=no telnet=no

If desired, you can instead use a RADIUS authentication server.

add radius server=<radius-server-address>secret=<secret-key>

Page 10 AlliedWare™ OS How To Note: VPNs for Corporate Networks

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Allied Telesis AR440S manual Capture status information remotely, if desired, Configure dynamic PPP over L2TP connections

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.