NETGEAR DG834GV v2 manual Firewall Rules

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Reference Manual for the Integrated ADSL Modem and Wireless Router with Voice, Model

5.To delete a keyword or domain, select it from the list, click Delete Keyword, then click Apply.

6.To specify a trusted user, enter that computer’s IP address in the Trusted IP Address box and click Apply.

You can specify one trusted user, which is a computer that will be exempt from blocking and logging. Since the trusted user will be identified by an IP address, you should configure that computer with a fixed IP address.

7.Click Apply to save your settings.

Firewall Rules

Firewall rules are used to block or allow specific traffic passing through from one side of the router to the other. Inbound rules (WAN to LAN) restrict access by outsiders to private resources, selectively allowing only specific outside users to access specific resources. Outbound rules (LAN to WAN) determine what outside resources local users can have access to.

A firewall has two default rules, one for inbound traffic and one for outbound. The default rules of the DG834GV are:

Inbound: Block all access from outside except responses to requests from the LAN side.

Outbound: Allow all access from the LAN side to the outside.

You can define additional rules that will specify exceptions to the default rules. By adding custom rules, you can block or allow access based on the service or application, source or destination IP addresses, and time of day. You can also choose to log traffic that matches or does not match the rule you have defined.

You can change the order of precedence of rules so that the rule that applies most often will take effect first. See “Order of Precedence for Rules” on page 5-11for more details.

Protecting Your Network

5-5

v1.0, September 2006

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Contents NETGEAR, Inc Statement of Conditions TrademarksEuropean Union Statement of Compliance Bestätigung des Herstellers/Importeurs World Wide Web Certificate of the Manufacturer/ImporterVoluntary Control Council for Interference Vcci Statement Customer SupportDG834GV Product and Publication DetailsContents Chapter VoIP and Telephone Settings Chapter Advanced Configuration Troubleshooting the ISP Connection Adsl link Audience, Scope, Conventions, and Formats Chapter About This ManualManual Scope How to Print this ManualPrinting the Full Manual V1.0, September About the Modem Router Chapter IntroductionPowerful, True Firewall Key FeaturesEasy Installation and Management Standards-based Wireless NetworkingProtocol Support Auto Sensing and Auto Uplink LAN Ethernet Connections Virtual Private Networking VPNContent Filtering What’s in the Box? LED Descriptions Router’s Front PanelIntroduction Router’s Rear PanelConnecting the Router to the Internet Observe Performance, Placement, and Range Guidelines Chapter Wireless ConfigurationConsiderations for a Wireless Network Implement Appropriate Wireless Security Understanding Wireless Settings Wireless Network Wireless Security Options Wireless Station Access ListField Description WPA-PSK Wi How to Set Up and Test Basic Wireless ConnectivityHow to Restrict Wireless Access to Your Network These options are discussed below V1.0, September How to Configure WEP Go to the WEP Security Encryption portion How to Configure WPA-802.1x How to Configure WPA-PSKConfiguring the Telephony Settings Chapter VoIP and Telephone SettingsSetting Up the Voice-over-IP Settings Setting Up the Pstn Settings Viewing the Voice Status Line 1/Line 2 Status Viewing the Call LogLine 1/Line V1.0, September Chapter Protecting Your Network How to Change the Built-In PasswordChanging the Administrator Login Timeout How to Block Keywords and Sites Configuring Basic Firewall ServicesBlocking Keywords, Sites, and Services V1.0, September Firewall Rules Inbound Rules Port Forwarding Inbound Rule Example a Local Public Web Server Inbound Rule Example Allowing Videoconferencing Considerations for Inbound Rules Outbound Rules Service BlockingOutbound Rule Example Blocking Instant Messenger Order of Precedence for Rules How to Define Services ServicesHow to Set Your Time Zone Setting Times and Scheduling Firewall ServicesV1.0, September How to Schedule Firewall Services V1.0, September Chapter Managing Your Network Backing Up, Restoring, or Erasing Your SettingsHow to Back Up the Configuration to a File How to Erase the Configuration How to Restore the Configuration from a FileUpgrading the Modem Router’s Firmware How to Upgrade the Modem Router FirmwareV1.0, September Viewing Modem Router Status and Usage Statistics Network Management InformationMenu 3.2 Modem Router Status Fields This screen shows the following parametersVPI Router Statistics Fields This screen shows the following statisticsConnection Status Fields for PPPoA Viewing, Selecting, and Saving Logged Information Viewing Attached DevicesAn example of the logs file is shown below Security Log action buttons Security Log entry descriptionsSaving Log Files on a Server Activation and AdministrationExamples of Log Messages Selecting What Information to LogDropped Packets Enabling Security Event E-mail NotificationSend alerts and logs via email Running Diagnostic Utilities and Rebooting the Modem Router Enabling Remote Management Configuring Remote ManagementHttp//134.177.0.1238080 Configuring Advanced Security Chapter Advanced ConfigurationHow to Configure a Default DMZ Server Setting Up a Default DMZ ServerConnect Automatically, as Required Disable Port Scan and DOS ProtectionMTU Size Configuring LAN IP SettingsRespond to Ping on Internet WAN Port V1.0, September Use Router as Dhcp server DhcpV1.0, September Reserved IP addresses How to Configure LAN TCP/IP Settings How to Configure Dynamic DNS Configuring Dynamic DNSSelect the Use a dynamic DNS service check box Static Route Example Using Static RoutesHow to Configure Static Routes Universal Plug and Play UPnP V1.0, September V1.0, September Basic Functioning Chapter TroubleshootingTest LED Never Turns On or Test LED Stays On Power LED Not OnLAN or Internet Port LEDs Not On Troubleshooting the Web Configuration InterfaceInternet LED Blinking Amber Troubleshooting the ISP ConnectionAdsl link Internet LED Off Obtaining a WAN IP AddressTroubleshooting PPPoE or PPPoA Testing the LAN Path to Your Router Troubleshooting a TCP/IP Network Using the Ping UtilityTroubleshooting Internet Browsing Testing the Path from Your Computer to a Remote Device Using the Reset button Restoring the Default Configuration and PasswordProblems with Date and Time V1.0, September Network Protocol and Standards Compatibility Appendix a Technical SpecificationsV1.0, September Document Link Appendix B Related DocumentsV1.0, September