ZyXEL Communications LTE7460-M608 User Manual page 82

Note: You also need to configure NAT port forwarding (or full featured NAT address mapping
rules) to allow computers on the WAN to access devices on the LAN.
• WAN to Router
By default the LTE7460-M608 stops computers on the WAN from managing the LTE7460-M608. You
could configure one of these rules to allow a WAN computer to manage the LTE7460-M608.
Note: You also need to configure the remote management settings to allow a WAN
computer to manage the LTE7460-M608.
You may define additional rules and sets or modify existing ones but please exercise extreme caution in
doing so.
For example, you may create rules to:
• Block certain types of traffic, such as IRC (Internet Relay Chat), from the LAN to the Internet.
• Allow certain types of traffic, such as Lotus Notes database synchronization, from specific hosts on the
Internet to specific hosts on the LAN.
• Allow everyone except your competitors to access a web server.
• Restrict use of certain protocols, such as Telnet, to authorized users on the LAN.
These custom rules work by comparing the source IP address, destination IP address and IP protocol
type of network traffic to rules set by the administrator. Your customized rules take precedence and
override the LTE7460-M608's default rules.
7.17.2.2 Guidelines For Enhancing Security With Your Firewall
Change the default password via web configurator.
1
Think about access control before you connect to the network in any way.
2
Limit who can access your router.
3
Don't enable any local service (such as telnet or FTP) that you don't use. Any enabled service could
4
present a potential security risk. A determined hacker might be able to find creative ways to misuse the
enabled services to access the firewall or the network.
For local services that are enabled, protect against misuse. Protect by configuring the services to
5
communicate only with specific peers, and protect by configuring rules to block packets for the services
at specific interfaces.
Protect against IP spoofing by making sure the firewall is active.
6
Keep the firewall in a secured (locked) room.
7
7.17.2.3 Security Considerations
Note: Incorrectly configuring the firewall may block valid access or introduce security risks to
the LTE7460-M608 and your protected network. Use caution when creating or deleting
firewall rules and test your rules after you configure them.
Consider these security ramifications before creating a rule:
Chapter 7 Networking
LTE7460-M608 User's Guide
82