150 | SMC Networks SMC7204BRA specs

Configuring IP Filters and Blocked Protocols

needed or wanted on your network, this feature provides a convenient way to discard such data before it is passed.

To display the [Blocked Protocols] page, click the [Services] tab, and then click [Blocked Protocols] in the task bar. The [Blocked Protocols] page appears, as shown in Figure 52.

Figure 52. Blocked Protocols Page

Warning: Blocking certain protocols may disrupt or disable your network communication or Internet access. If you are unfamiliar with how your network

or Internet connection uses these protocols, contact your ISP before disabling.

The following list describes each of the available protocols.

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SMC Networks SMC7204BRA manual 150

Contents

Page February Table of Contents Getting Started with the Configuration Manager Configuring the LAN PortsConfiguring Dynamic Host Configuration Protocol Configuring Network Address Translation Configuring DNS Server Addresses Configuring IP RoutesConfiguring the Routing Information Protocol Configuring the ATM Virtual Circuit Configuring PPP Interfaces Configuring EOA InterfacesConfiguring IPoA Interfaces Configuring Bridging Appendix a Viewing DSL Line Information Administrative TasksAppendix B Features Introduction Using this Document System RequirementsIntroduction Notational conventions Typographical conventions Using this DocumentSpecial messages Package Contents Getting to Know Adsl Barricade Hardware Description Getting to Know the Adsl BarricadeFront Panel Rear Panel Connecting the Hardware Quick Start Quick Start Connect the Adsl cable Configuring Your Computers Attach the power connectorPower up your systems Connect the Ethernet cable Windows XP Windows Windows Me Windows 95 Quick Start Windows NT Assigning static Internet Information to your PCs Configuring the Adsl Barricade Configuring the Adsl BarricadeLogging into the Adsl Barricade Quick Configuration With your ISP Path that your connection uses to communicate with your ISP Configuration of your device PasswordYou have used to log in to Configuration Manager Bridge Default Router Settings Addresses Description of the NAT service Internet. See ConfiguringLAN Ports on page 33 for a Getting Started with the Configuration Manager Accessing the Configuration Manager Getting Started with the Configuration Manager Login Screen Functional Layout Functional LayoutCommonly used buttons Browser window. Help is available from any main topic Home Page and System View Table System View Table Home Page and System View Table Modifying Basic System Information Time Zone Modifying Basic System InformationDaylight Committing Changes and Rebooting Committing your changes Committing Changes and Rebooting Rebooting the device using Configuration Manager Reboot from Last ConfigurationJust committed Session Connecting via Ethernet ConfiguringConfiguring the LAN Port IP Address Configuring the LAN Ports LAN Configuration Configuring the LAN Port IP Address Configuring the LAN Ports Configuring the LAN Port IP Address Viewing System IP Addresses and IP Performance Statistics Viewing the Adsl Barricades IP Addresses Viewing System IP Addresses and IP Performance Statistics Viewing IP Performance Statistics Viewing IP Performance Statistics What is DHCP? Configuring Dynamic Host Configuration ProtocolOverview of Dhcp Why use DHCP? Configuring Dynamic Host Configuration ProtocolAdsl Barricade Dhcp modes Configuring Dhcp Server Configuring Dhcp ServerGuidelines for creating Dhcp server address pools Configuring Dynamic Host Configuration Protocol Adding Dhcp Server Address Pools Start IP Address End IP AddressFor distribution to your LAN computers Mac Address As explained on Domain NameAddresses in this pool. This is used for reference only Gateway Viewing, modifying, and deleting address pools Dhcp Server Pool Modify Excluding IP addresses from a pool Viewing current Dhcp address assignments Configuring Dhcp Relay NetmaskThese terms Mac Configuring Dhcp Relay Dynamic Host Configuration Protocol Dhcp Relay Configuration Setting the Dhcp Mode Dynamic Host Configuration Protocol Dhcp Setting the Dhcp Mode Configuring Network Address Translation Overview of NAT Configuring Network Address Translation Viewing NAT Global Settings and Statistics Viewing NAT Global Settings and Statistics TCP Def Timeout Active state, where the connection is being used toTime specified in TCP Idle Timeout When in the establishing state, the session will timeout NAT Rule Global Statistics Network Address Translation NAT Rule Configuration Viewing NAT Rules and Rule Statistics Viewing Current NAT Translations Viewing Current NAT Translations Is enabled Was invoked from the rule definitionProtocol TCP, UDP, Icmp Translated Out PortsPorts Number was translated Adding NAT Rules Adding NAT Rules NAT Rule-Add Page Napt Flavor RDR rule Allowing external access to a LAN computer NAT Rule Add Page RDR Flavor Configuring Network Address Translation Adding NAT Rules Basic rule Performing 11 translations NAT Rule Add Page Basic Flavor Adding NAT Rules NAT Rule Add Page Filter Flavor Adding NAT Rules Bimap rule Performing two-way translations NAT Rule Add Page Bimap Flavor NAT Rule Add Page Pass Flavor Adding NAT Rules About DNS Configuring DNS Server AddressesAssigning DNS Addresses Configuring DNS Relay Configuring DNS Server Addresses Configuring DNS Relay Domain Name Service DNS Configuration IP routing versus telephone switching Configuring IP RoutesOverview of IP Routes Configuring IP Routes Hops and gateways Overview of IP Routes Using IP routes to define default gatewaysDo I need to define IP routes? Viewing the IP Routing Table IP Route Table Viewing the IP Routing Table Adding IP Routes IP Route-Add Adding IP Routes Configuring the Routing Information Protocol RIP Overview Configuring the Routing Information Protocol Configuring the Adsl Barricades Interfaces with RIPWhen should you configure RIP? Configuring the Adsl Barricades Interfaces with RIP Routing Information Protocol RIP Configuration Configuring the Routing Information Protocol Configuring the Adsl Barricades Interfaces with RIP Viewing RIP Statistics RIP Global Statistics Configuring the ATM Virtual Circuit Viewing Your ATM VC Configuring the ATM Virtual Circuit Software and identify the type of traffic that can beUse an aal5-type interface Vpi Adding ATM VCs Adding ATM VCs Modifying ATM VCs Modifying ATM VCs ATM VC Interface Modify Configuring PPP Interfaces Viewing Your Current PPP Configuration Configuring PPP InterfacesInactivity TimeOut mins Ignore WAN to LAN traffic while monitoring inactivity Viewing Your Current PPP Configuration Disable, LAN hosts will use the DNS address Preconfigured in the Dhcp pool see ConfiguringUnder way e.g., password authorization or Device will acquire IP addresses for other Viewing PPP Interface Details Viewing PPP Interface Details Enabled RebootedService Name Each requiring a different login and other By changing the Configuration Manager settings With the timeout period specified on the PPPOn the user name and/or password provided ISP issued a special packet type to terminate Adding a PPP Interface Definition PPP Interface Add Modifying and Deleting PPP Interfaces Modifying and Deleting PPP Interfaces 114 Configuring EOA Interfaces Overview of EOA Viewing Your EOA Setup Configuring EOA Interfaces Viewing Your EOA Setup Default Route Enable or disable the interface a red ball may indicate aProblem with the DSL connection Adding EOA Interfaces Adding EOA Interfaces EOA Interface Add 120 Configuring Ipoa Interfaces Viewing Your IPoA Interface Setup Configuring IPoA Interfaces Enable or disable the interface a down interface may Indicate a problem with the DSL connectionAdding IPoA Interfaces Adding IPoA Interfaces 124 Configuring Bridging Overview of Bridges Configuring Bridging When to Use the Bridging Feature When to Use the Bridging FeatureDefining Bridge Interfaces 128 Deleting a Bridge Interface Deleting a Bridge Interface Configuring Firewall Settings Configuring Global Firewall Settings Configuring Firewall Settings Configuring Global Firewall Settings ID assigned to the rule Managing the Black ListIts automatic timed expiration Configuring IP Filters and Blocked Protocols Configuring IP Filters Configuring IP Filters and Blocked Protocols Viewing Your IP Filter Configuration Configuring IP Filters Configuring IP Filter Global Settings Creating IP Filter Rules External computers from accessing your LAN That are incoming or outgoing on the selected interfaceIncoming refers to packets coming from the LAN Outgoing refers to packets going to the Internet Choosing the appropriate interface for various rule types Option is valid only for the outgoing direction Log Option to Enable if you configure a Log Tag SecurityLow, then the rule will be inactive Blacklist Rule to be invoked on packets containing Any any source IP addressLt any source IP address that is numerically less than Specified address Unwelcome attempt to gain access to a network Store StateAn ongoing communication, etc. This option provides Received in the anticipated state. Such packets can signify That have options specified in their packet headers IP filter rule examples Example 146 Viewing IP Filter Statistics Managing Current IP Filter Sessions IP Filter Rule Statistics Blocked Protocols Blocked ProtocolsFilter rule, are assigned a session index Time to expire 150 Address Resolution Protocol. Computers on a LAN use ARP to Computers when they only know their IP addressesYour ISP before blocking this protocol Is often used for handling e-mail, mailing lists Large networks Viewing DSL Line Information DSL Status Viewing DSL Line Information DSL Parameter 155 156 Configuring User Names and Passwords Administrative TasksChanging Login Passwords Administrative Tasks User Configuration Viewing System Alarms Viewing System AlarmsViewing the Alarm Table Image Upgrade Upgrading the Software Using Diagnostics Using DiagnosticsFile 162 Modifying Port Settings Modifying Port SettingsOverview of IP port numbers Modifying the Adsl Barricade’s port numbers 165 IP Addresses Appendix aStructure of an IP address Appendix a Network ID Host ID Network classes Network classes Subnet masks Subnet masks Binary Numbers Appendix BDefinition binary numbers Bits and bytes Appendix BDefinition bit and byte Troubleshooting Troubleshooting Internet Access My PC cannot access Internet My LAN PCs cannot display web pages on the Internet My changes to Configuration Manager are not being retained Diagnosing Problem using IP Utilities 179 180 Technical Specifications Technical Specifications Chap Operating System Support Power DissipationEnvironmental Operating Range Power Input WeightDimensions Safety Terminology AuthenticateAnalog Terminology Digital Domain name DownloadEthernet Filtering Firewall GbpsHop Hop count Host In-line filterInternet Intranet 191 Mask MbpsMicrofilter NAT rule Packet Network maskPort Protocol Pots splitterRemote Routing RuleSplitter Splitterless Subnet Subnet mask Twisted pair TelnetUpstream Web browser Web Web site FCC Class B CompliancesFCC Part Compliances EC Conformance Declaration Class B Safety Compliance Wichtige Sicherheitshinweise Germany Compliances SMCs Limited Warranty Statement Legal Information Contacts Legal Information and Contacts Limitation of Liability Is subject to change without notice