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Cisco E4200 Router Configuration

Network Address Translation

Network Address Translation (NAT) is used to convert internal IP addresses into public IP addresses. This allows multiple devices on our customer’s networks to access the internet through one of public IP addresses provided by their internet service provider. The following steps will walk you through configuring the Cisco E4200 Router to perform NAT from the web browser based utility page. 1. Click the Advance Routing link in the Setup menu.

2. Click the Enabled radio button on the NAT line to activate NAT and click the Save Settings button at the bottom of the page.

Packet Filtering

Configuring our client’s router to conduct packet filtering will add an additional layer of security for their network. Advanced packet filtering is conducted by creating rules that either allow or reject incoming traffic based on protocol type and port number. The Cisco E4200 comes with pre-configured rules that conduct very general packet inspection. The following steps will outline how to configure the Cisco E4200 Router to perform packet filtering from the web browser based utility page. 1. Click the Security link from the menu.

2. Click the Enabled radio buttons for IPv4 and IPv6 SPI Firewall Protection.

Default Gateway

Installing a router for our customers will make it their Default Gateway to their ISP. A default Gateway is used to route internet traffic to and from the hosts on the network. Our customers may receive their internet service from a provider who does not utilize DHCP. In this case, we will need to input their assigned IP address, Subnet Mask, Default Gateway, and DNS server. For those ISPs who utilize DHCP, configuration may not necessary. The following steps will be used to configure the Cisco E4200 . 1. Select Static IP from the Internet Connection

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