Introduction, Contents | Allied Telesis Layer 3 Switches instruction

How To Create A Secure Network With Allied Telesis Managed Layer 3 Switches

Introduction

Allied Telesis switches include a range of sophisticated security features at layer 2 and layer 3. This How To Note describes these features and includes brief examples of how to configure them.

The implementations shown in this How To Note should be thought of as industry-standard best practices.

Contents
Introduction	1
Which products and software versions does this information apply to?	2
Securing the device	3
Protecting the network	3
Protecting against packet flooding	3
Protecting against rapid MAC movement	6
Controlling multicast traffic	7
Managing the device securely	9
Using Secure Shell (SSH)	9
Using SSL for secure web access	10
Using SNMPv3	10
Whitelisting telnet hosts	12
Identifying the user	14
IP spoofing and tracking	14
Rejecting Gratuitous ARP (GARP)	15
DHCP snooping	15
Using 802.1x port authentication	17
Protecting the user	18
Using private VLANs	18
Using local proxy ARP and MAC-forced forwarding	19
Using IPsec to make VPNs	24
Protecting against worms	25

C613-16103-00 REV A

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Allied Telesis Layer 3 Switches manual Introduction, Contents

Contents

Introduction Contents Edge switch Access Router Protecting the network Securing the deviceProtecting against packet flooding Bandwidth limiting Configuration To use storm protection Using QoS policy-based storm protection Rest of the QoS configuration is as normal, so Reboot after turning on enhanced modeConfiguration on one or more ports Protecting against rapid MAC movement Igmp snooping Controlling multicast traffic Igmp filtering Configuration For each portIgmp throttling Configuration Using Secure Shell SSHManaging the device securely Using SNMPv3 Using SSL for secure web accessConfiguration 1. Enable Snmp Managing the device securely Building a whitelist through layer 3 filters Whitelisting telnet hosts Building a whitelist through QoS IP spoofing and tracking Identifying the userTrouble with ARP Dhcp snooping Rejecting Gratuitous ARP Garp Using static binding for rigid control Setting up Dhcp snooping Using Dhcp snooping to track clients Using 802.1x port authenticationUsing ARP security Protecting the user Using private VLANs To remove ports from the Vlan Using local proxy ARP and MAC-forced forwarding Local proxy ARP Configuration of access router Example Add ip int=vlan104 ip=address-in-192.168.4.0-subnet MAC-Forced Forwarding Macff Switches Using IPsec to make VPNsAccess Edge Blocking worms through classifier-based filters Protecting against worms Blocking worms through QoS actions Edge switch 1 is directly connected to the access router Edge switch Edge switch Add ip int=vlan500 ip=172.16.5.103 mask=255.255.255.0 Access Router C613-16103-00 REV a