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This header information is what the packet filter uses to make filtering decisions. It is
important to note that a packet filter does not look into the IP data stream (the User Data
from above) to make filtering decisions.
Basic protocol types
TCP: Transmission Control Protocol. TCP provides reliable packet delivery and has a
retransmission mechanism (so packets are not lost). RFC 793 is the specification for TCP.
UDP: User Datagram Protocol. Unlike TCP, UDP does not guarantee reliable, sequenced
packet delivery. If data does not reach its destination, UDP does not retransmit the data.
RFC 768 is the specification for UDP.
There are many more ports defined in the Assigned Addresses RFC. The table that follows
shows some of these port assignments.
Protocol TCP
DATA User Data
- Software User Guide 1
- Copyright 2
- Expert Mode 4
- Command Line Interface 8
- Table of Contents 10
- CHAPTER 1 Introduction 13
- About Netopia Documentation 14
- Intended Audience 14
- Documentation Conventions 15
- Organization 17
- A Word About Example Screens 17
- CHAPTER 2 Basic Mode Setup 19
- ☛ CAUTION: 20
- ☛ Achtung: 21
- Microsoft Windows: 22
- Then go to Step 2 24
- PPPoE Quickstart 27
- Netopia Pocket Gateway/ 30
- RJ-11 phone cable 30
- USB port 30
- Home Page - Basic Mode 32
- Link: Manage My Account 34
- Link: Status Details 35
- Enable Rmt Mgmt 36
- Link: Expert Mode 37
- CHAPTER 3 Expert Mode 41
- Expert Mode 42
- Home Page - Expert Mode 43
- Home Page - Information 43
- Link: Breadcrumb Trail 45
- Button: Restart 46
- Link: Alert Symbol 47
- Button: Help 48
- Button: Configure 49
- Link: Quickstart 49
- Connect to the Internet 50
- Link: LAN 51
- (supported models) 54
- Multiple SSIDs 63
- Wireless MAC Authorization 64
- MAC Authorization 65
- RADIUS Server 68
- Link: WAN 69
- Ethernet WAN interface 73
- PPP over ATM (PPPoA) VC muxed 75
- RFC-1483 Bridged Ethernet 75
- RFC-1483 Routed IP 75
- ATM Traffic Shaping 76
- Link: Advanced 78
- Link: IP Static Routes 79
- Save Changes 80
- Link: IP Static ARP 81
- Link: Pinholes 81
- Application 1 82
- Application 2 82
- Application 3 82
- Add or Edit more Pinholes 85
- NAT/PAT Table 89
- Link: Default Server 90
- Link: Differentiated Services 94
- Link: DNS 97
- Link: DHCP Server 97
- Link: RADIUS Server 99
- Link: SNMP 100
- ☛ WARNING: 101
- Configure 103
- ☛ NOTE: 104
- Link: UPnP 105
- Link: LAN Management 106
- Configuring for Bridge Mode 108
- Link: VLAN 111
- ☛ Note: 115
- Advanced 116
- Save and Restart 116
- 3. Click the Submit button 119
- 5. Click the Submit button 119
- 2. Click the Submit button 121
- Click the Submit button 122
- Link: System 124
- Link: Syslog Parameters 124
- Log Event Messages 126
- Access-related Log Messages 127
- Link: Internal Servers 129
- Link: Software Hosting 130
- Rename a User(PC) 132
- Link: Clear Options 134
- Link: Time Zone 134
- Button: Security 135
- Link: Passwords 136
- Security 139
- • ICMP • HTTP • FTP 140
- • SNMP • telnet • DHCP 140
- Link: IPSec 143
- SafeHarbour IPSec VPN 144
- Exposed Addresses 154
- Add more Exposed Addresses 155
- Port Protocol Description 158
- LAN (Private) 158
- Interface 158
- WAN (Public) 158
- Basic protocol types 160
- Firewall design rules 161
- Example filter set page 163
- Internet 164
- IP 200.1.1.?? 164
- Input Packet 164
- Example filters 165
- Packet Filter 167
- APPROVED 168
- How individual filters work 169
- Firewall Tutorial 171
- Design guidelines 176
- 9. From the 182
- Deleting a filter set 183
- Ethernet 100BT 184
- TOS field matching 186
- Link: Security Log 189
- Button: Install 192
- Link: Install Software 193
- Step 1: Required Files 194
- Install Software 195
- Link: Install Key 197
- Install Key 198
- Restart the Gateway 199
- Link: Install Certificate 201
- Install Certificate 202
- • read the Quickstart Guide; 203
- Status Indicator Lights 204
- ETHER NET 206
- ☛ Special patterns: 209
- DSL Sync: 210
- LAN 1, 2, 3, 4: 210
- Netopia Gateway 3347W, 3347 211
- WG status indicator lights 211
- Front View 212
- LED Function Summary Matrix 213
- Wireless 215
- Factory Reset Switch 216
- Home Page 220
- Item Description 221
- Button: Troubleshoot 222
- Link: System Status 223
- Link: Ports: Ethernet 224
- Link: Ports: DSL 225
- Link: IP: Interfaces 226
- Link: System Log: Entire 228
- Link: Diagnostics 229
- Link: Network Tools 230
- button 231
- TraceRoute 232
- Overview 236
- CONFIG Commands 237
- Logging In 238
- Ending a CLI Session 238
- Using the CLI Help Facility 239
- About SHELL Commands 239
- SHELL Commands 240
- CODE Description 241
- About CONFIG Commands 251
- Guidelines: CONFIG Commands 254
- Common Commands 259
- Dynamic DNS Settings 262
- Ethernet LAN Settings 268
- MAC_address 273
- netmask 276
- MAC_address 279
- SafeHarbour IPSec Settings 286
- Stateful Inspection 292
- Example: 293
- Operator Action 296
- 3. Enabling syslog: 304
- 4. Set NTP parameters 304
- • Type save 305
- Wireless Privacy Settings 309
- RADIUS Server Settings 312
- 123.45.678.910 316
- ☛ CAUTION! 318
- VDSL Parameter Defaults 319
- Parameter Default Meaning 319
- Parameter Accepted Values 320
- Glossary 327
- -----B 328
- -----C 329
- -----D 330
- -----E 332
- -----F 332
- -----H 333
- -----I 334
- -----K 335
- -----L 335
- -----M 336
- -----N 337
- -----P 337
- -----Q 338
- -----R 339
- -----S 339
- • Lifetime of encryption keys 340
- • The lifetime of the SA 340
- -----T 341
- -----U 342
- -----V 342
- -----W 342
- -----X 342
- ■ 12 VDC input 343
- Agency approvals 345
- ☛ Warnings: 346
- ☛ Important 347
- Important Safety Instructions 348
- 47 CFR Part 68 Information 349
- RF Exposure Statement: 350
- Electrical Safety Advisory 350
- • “Management” on page 354 351
- • “Security” on page 355 351
- Wide Area Network Termination 352
- DNS Proxy 353
- Netopia Gateway 356
- Netopia, Inc 369
- 6001 Shellmound Street 369
- Emeryville, CA 94608 369
- June 8, 2006 369
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