Netopia R2020 Manual do Utilizador Página 237
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Security 14-33
Example Network
Example Filters
Example 1
Incoming packet has the source address of 200.1.1.28
This incoming IP packet has a source IP address that matches the network address in the Source IP Address
field (00000000) in the Netopia R2020. This will NOT forward this packet.
Filter Rule: 200.1.1.0 (Source IP Network Address)
255.255.255.128 (Source IP Mask)
Forward = No (What happens on match)
IP Address Binary Representation
200.1.1.28 00011100 (Source address in incoming IP packet)
AND
255.255.255.128 10000000 (Perform the logical AND)
00000000 (Logical AND result)
Netopia
Internet
IP: 200.1.1.??
DATA
Incoming
Packet Filter
- R2020 Dual Analog Router 1
- Part I: Getting Started 7 3
- Part III: Appendixes 15 10
- Overview 21
- Features and capabilities 21
- How to use this guide 22
- Find a location 23
- What you need 23
- 2 Telco 24
- 1 Ethernet 24
- Ethernet 26
- Line 2 Line 1 26
- Netopia R2020 LED front panel 28
- Before running SmartStart 29
- Easy option 32
- Advanced option 36
- Sharing the Connection 37
- 10Base-T 47
- Adding an external modem 48
- Configuring Telnet software 53
- Easy Setup console screens 55
- Beginning Easy Setup 57
- Easy Setup profile 57
- IP Easy Setup 58
- Easy Setup Security 60
- 7-6 User’s Reference Guide 68
- Deleting connection profiles 69
- System Configuration screens 69
- System Configuration features 70
- Network Protocols Setup 72
- Filter Sets (Firewalls) 72
- IP Address Serving 73
- Date and Time 73
- Console Configuration 73
- Security 74
- Upgrade Feature Set 74
- Installing the Syslog client 75
- Netopia R2020 back panel 79
- Scheduled connections 83
- ■ System 89
- ■ Connection 89
- 8-16 User’s Reference Guide 92
- Transit Internetwork 104
- User’s Reference Guide 108
- VPN QuickView 111
- ■ “PPTP Example” on page 9-19 121
- ■ “ATMP Example” on page 9-22 121
- 9-20 User’s Reference Guide 122
- 9-24 User’s Reference Guide 126
- Map Lists 130
- Server Lists 130
- Easy-PAT List 131
- Easy-Servers 131
- Add Server 139
- 10-16 User’s Reference Guide 142
- IP subnets 155
- Static routes 157
- IP address serving 161
- DHCP NetBIOS Options 163
- DHCP Relay Agent 166
- IPX Features 169
- IPX Definitions 169
- IPX address 170
- NetBIOS 171
- IPX Spoofing 171
- IPX setup 171
- IPX in the answer profile 173
- 11-6 User’s Reference Guide 174
- IPX routing tables 175
- 11-8 User’s Reference Guide 176
- AppleTalk networks 177
- AppleTalk protocol 177
- Routers and seeding 179
- Installing AppleTalk 180
- Configuring AppleTalk 182
- EtherTalk Setup 182
- LocalTalk Setup 183
- AURP setup 184
- 12-12 User’s Reference Guide 188
- Quick View status overview 189
- General Status 190
- Current Status 191
- Status lights 191
- Statistics & Logs 192
- General Statistics 192
- Event Histories 193
- Routing Tables 195
- Served IP Addresses 198
- Reset All Leases 199
- Release BootP Leases 199
- System Information 200
- The SNMP Setup screen 201
- SNMP traps 202
- 13-16 User’s Reference Guide 204
- Suggested security measures 205
- User accounts 206
- Dial-in Console Access 207
- Enable SmartStart/Web Server 208
- Telnet access 208
- About filters and filter sets 208
- How filter sets work 209
- How individual filters work 211
- Design guidelines 215
- Adding a filter set 217
- Viewing filter sets 220
- Modifying filter sets 221
- Deleting a filter set 221
- A sample IP filter set 221
- IPX filters 225
- IPX packet filters 226
- IPX packet filter sets 227
- IPX SAP filters 229
- IPX SAP filter sets 231
- Firewall tutorial 232
- General Firewall Terms 232
- Basic IP Packet Components 233
- Basic Protocol Types 233
- Firewall design rules 234
- Filter Basics 236
- Example Filters 237
- Token Security Authentication 240
- Securing network environments 240
- Using the SecurID token card 240
- Trace Route 249
- Telnet client 250
- Secure Authentication Monitor 250
- Factory defaults 251
- Updating firmware 252
- Downloading configuration files 253
- Uploading configuration files 254
- Restarting the system 257
- 15-14 User’s Reference Guide 258
- Configuration problems 261
- SmartStart Troubleshooting 262
- Console connection problems 262
- Network problems 262
- Power outages 263
- Technical support 263
- How to reach us 263
- SmartIP™ 267
- What is IP? 269
- About IP addressing 269
- Subnets and subnet masks 270
- Distributing IP addresses 273
- Configuration 275
- Using address serving 276
- Nested IP subnets 279
- Internet 279
- Broadcasts 281
- Packet header types 281
- C-14 User’s Reference Guide 282
- Binary Conversion Table D-1 283
- D-2 User’s Reference Guide 284
- E-4 User’s Reference Guide 288
- HD-15 DB-25 289
- Description 290
- Power requirements 290
- Environment 290
- Software and protocols 291
- Agency approvals 291
- Regulatory notices 291
- Important safety instructions 293
- F-6 User’s Reference Guide 294
- Trunk Line 297
- Class A, B, and C networks 300
- 8 User’s Reference Guide 304
- see IP addresses 307
- 2 User’s Reference Guide 312
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