3Com 3C840 - page 140

12-6 CHAPTER 12: CONFIGURING FILTERS

Example: To prevent seven individual PCs on the LAN from accessing a

remote site, create the following two filters:

Filter for Packets: Going to Remote Site Vienna

Filter Name: Block PCs 1-6 Protocol: IP Enabled: Yes

Discard Packet if IP Source Address is Equal to 192.168.200.41

or if IP Source Address is Equal to 192.168.200.50

or if IP Source Address is Equal to 192.168.200.66

or if IP Source Address is Equal to 192.168.200.42

or if IP Source Address is Equal to 192.168.200.88

or if IP Source Address is Equal to 192.168.200.90

Filter Name: Block PC 7 Protocol: IP Enabled: Yes

Discard Packet if IP Source Address is Equal to 192.168.200.102

The filters BLOCK PCs 1-6 and BLOCK PC 7 both use the IP protocol and

the same action, “Discard Packet if...”

Therefore, when they are applied, they are “or”ed together. The resultant

filtering is the same as you would get if you were allowed to create a

single filter that contained all seven conditions.

OfficeConnect

Remote 840 Manager

Filter Screens

The OfficeConnect Remote 840 Manager (HTML) filter screens provide an

easy to use menu system for specifying the direction/location of the

traffic to be checked and for creating and editing filter conditions. The

filter screens are set up to allow you to create sentences that describe the

filter action. For example, a filter that prevents IPX packets from Jan and

Bob's PCs from being sent to Remote Site Vienna would look something

like this:

Filter for Packets: Going to Remote Site Vienna

Filter Name: Block Jan and Bob

Discard Packet if IPX Source Node is Equal to 00-20-69-00-23-99

or if IPX Source Node is Equal to 00-20-69-11-45-88

The sentence is built up over a number of screens. Most filters can be

easily created by selecting from the provided condition sentences. Each

sentence has pull down boxes for selecting condition keywords (IP

Destination Address / IP Source Address, etc.) and condition operations (is

Equal to / is Not Equal to, etc.) Where appropriate, the additional

flexibility of generic filters is available. With generic filters, you specify an

offset into the packet and the hex value to compare the packet content

840ug.book Page 6 Friday, July 7, 2000 2:23 PM

Contents

Main 3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145 A BOUT T HIS G O SYSTEM ADMINISTRATION R EMOTE S ITE M C ONFIGURING IP R C ONFIGURING B NETWORK ADDRESS TRANSLATION USING THE OFFICECONNECT REMOTE 840 CONFIGURING DHCP CONFIGURING DNS C ONFIGURING IPX R UPGRADING OPERATIONAL SOFTWARE FOR THE OFFICECONNECT REMOTE 840 MONITORING THE OFFICECONNECT REMOTE 840 C ONFIGURING F T A B RIDGING AND R B IP A C A DDRESS T RANSLATION T D U SING THE CLI G E F Page ABOUT THIS GUIDE Introduction How to Use This Guide This table shows where to find specific information in this guide. Conventions Table1 Notice Icons Table2 Text Convention Document Notation Safety Information Year 2000 Compliance Page 1 Introduction What Is the OfficeConnect Remote 840? What is an SDSL Modem? What is ATM? What is Frame Relay? What is a BRouter? What is a Remote Site? What is RFC 1483 What is RFC 1490? What is PPP? What is DHCP? What is DNS? What is Address Translation? What is DHCP Smart Mode? What Is Default Bridge Mode? Getting Started Quickly OfficeConnect Remote 840 Panel Features Page Page Page How to Manage the OfficeConnect Page Header Quick Link Area Main Area Where to Find More Configuration Information Page 2 Performing System Administration Tas k s Controlling Login and Telnet Access Page Modifying the Date and Time Restoring Factory Defaults Page Page Controlling TFTP Access Assigning SNMP Trap Managers Assigning Syslog Managers 3 Introduction Remote Site Overview Managing a Remote Site Profile Page Page Page Configuring ATM Information Page Configuring Protocol Parameters Monitoring Remote Site Connections 4 Introduction Overview Enabling IP Routing Configuring IP for the LAN Page Page Configuring IP RIP on the LAN Page Configuring IP for the Remote Site Page Page Configuring IP RIP on a Remote Site Configuring IP Static and Framed Routes Using IP Address Vali da tio n Page Monitoring IP Testing (PING) Page Page Page Page 5 Introduction Overview Page Configuring Bridging for the LAN Configuring Bridging for the Remote Site Connections Bridging IP Traffic MAC-Encapsulated Routing Bridge Firewall Page Advanced Bridging Options Default Bridge Mode Monitoring Bridging Testing Br idging Page 6 USING THE OFFICECONNECT REMOTE 840 Configuring the PAT Default Address Configuring Static PAT Port Entries Configuring NAT Monitoring 6-6 CHAPTER 6: NETWORK ADDRESS TRANSLATION USING THE OFFICECONNECT REMOTE 840 7 Introduction DHCP Overview Configuring the DHCP Mode Configuring the DHCP Server Page Page Page 8 Introduction DNS Overview Page Page Page 9 Introduction Overview Configuring IPX for the LAN Configuring IPX for Remote Sites Page Configuring IPX Static and Framed Routes Page Configuring IPX Static and Framed Services Page Page Configuring IPX RIP and SAP Page Monitoring IPX IPX Testing Page Page 10 SOFTWARE FOR THE OFFICECONNECT REMOTE 840 Introduction Obtaining Updated OfficeConnect Remote 840 Software Installing Operational Software to the OfficeConnect Remote 840 Unit Page Page 11 OFFICECONNECT REMOTE 840 Introduction Overview Throughput Performance Page Ethernet Interface Page Interface Status Page Page IP Page DHCP Address Translation Page IPX Bridge Events Logs Page 12 Introduction Filtering Overview Filtering Capabilities Page Creating Filters Creating Filters Using the OfficeConnect Remote 840 Page Page Page Page Basic IPX Condition has the followin g condition sentences to select from: Table 125 Basic IPX Condition Table 126 Advanced IPX Condition Advanced IPX Condition has the following condition sentences to select from: Page Page Step-by-Step Guide to Creating Filters Using the OfficeConnect Remote 840 Page Page 13 Introduction Troubleshooting Too l s Page LAN Connection IP Wizard and Web Browser Problems Page Page WAN Connection Problems General Network Connection Problems Page IP Network Connection Page Page IPX Network Connection Bridge Connection Problems Page A Introduction Bridging and Routing Concepts How Bridges Learn Page Page Page Network Organization, Structure, and Physical Layout Page Page IP Routing Page B Introduction to IP Addressing IP Addressing Basics Page Page Page Page Page Page Page Page Page C Overview Network Address Translation (NAT) Page Port Address Translation (PAT) Page Page D Overview Page E WIZARD) OF THE OFFICECONNECT REMOTE 840 Page Page Page Page Page Instructions for Telecommuting / Remote Office Access Page Page Page Page Page Using the Configuration Audit Saving the Tes ti ng th e Configuration F Online Technical Services Support from Your Network Supplier Support from 3Com Returning Products for Repair Numbers A B C Page D E F G H I L M N O P R S T U W Y Page 3Com Corporation LIMITED WARRANTY OFFICECONNECT Remote 840 SDSL Router H S OBTAINING WARRANTY S D FCC CLASS B STATEMENT FCC DECLARATION OF CONFORMITY