Netopia 4553 Manual do Utilizador Página 175
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Security 11-175
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 4553. 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
- G.SHDSL Router 1
- Features and capabilities 9
- How to use this guide 10
- Find a location 11
- What you need 11
- Netopia back panel 12
- Netopia LED front panel 13
- 2-14 User’s Reference Guide 14
- Sharing the Connection 3-21 21
- 3-22 User’s Reference Guide 22
- Netopia 4553 back panel 24
- Configuring Telnet software 27
- Easy Setup console screens 29
- DSL Line Configuration 31
- Easy Setup Profile 32
- IP Easy Setup 33
- 6-36 User’s Reference Guide 36
- Easy Setup is now complete 36
- WAN configuration 37
- The default profile 43
- IP Parameters 44
- Scheduled connections 45
- Viewing scheduled connections 46
- Adding a scheduled connection 47
- Set Weekly Schedule 48
- Set Once-Only Schedule 49
- Frame Relay configuration 50
- Frame Relay DLCI configuration 52
- System configuration screens 57
- System configuration features 58
- IP setup 59
- Filter sets (firewalls) 59
- IP address serving 59
- Date and time 59
- Console configuration 60
- Security 61
- Upgrade feature set 61
- Installing the Syslog client 62
- ■ “IP Setup” on page 8-64 63
- IP Setup 64
- IP subnets 66
- Static routes 68
- IP Address Serving 72
- IP Address Pools 75
- DHCP NetBIOS Options 77
- More Address Serving Options 79
- 8-84 User’s Reference Guide 84
- Connection Profiles 87
- IP Setup 8-89 89
- 8-90 User’s Reference Guide 90
- Features 91
- WAN Network 93
- LAN Network 93
- Supported traffic 95
- MultiNAT Configuration 95
- Modifying map lists 102
- Adding Server Lists 104
- Modifying server lists 107
- Deleting a server 109
- IP profile parameters 110
- IP Parameters 112
- NAT Associations 114
- MultiNAT Configuration Example 116
- Overview 121
- Transit Internetwork 122
- About PPTP Tunnels 123
- PPTP configuration 124
- About IPsec Tunnels 127
- Configuration 127
- IP Profile Parameters 130
- Advanced IP Profile Options 131
- About ATMP Tunnels 132
- ATMP configuration 132
- Encryption Support 135
- ATMP/PPTP Default Profile 136
- VPN QuickView 137
- Dial-Up Networking for VPN 138
- Installing Dial-Up Networking 138
- Installing the VPN Client 141
- Windows 95 VPN installation 141
- Windows 98 VPN installation 142
- PPTP example 144
- ATMP example 146
- Suggested security measures 151
- User accounts 151
- Telnet access 153
- About filters and filter sets 154
- How filter sets work 154
- APPROVED 155
- How individual filters work 156
- Design guidelines 161
- Adding a filter set 162
- Deleting a filter set 167
- A sample filter set 167
- Firewall tutorial 170
- General firewall terms 170
- Basic IP packet components 171
- Basic protocol types 171
- Firewall design rules 172
- Filter basics 174
- Example filters 175
- Quick View status overview 179
- General status 180
- Current status 181
- Status lights 181
- Statistics & Logs 182
- Event histories 182
- IP Routing Table 185
- General Statistics 185
- ■ Ethernet 186
- System Information 187
- The SNMP Setup screen 188
- SNMP traps 189
- Trace Route 196
- Telnet client 197
- Factory defaults 198
- Updating firmware 199
- Downloading configuration files 199
- Uploading configuration files 200
- Restarting the system 203
- Configuration problems 205
- Console connection problems 206
- Network problems 206
- Power outages 207
- Technical support 208
- How to reach us 208
- A-210 User’s Reference Guide 210
- Description 211
- Power requirements 211
- Environment 211
- Software and protocols 211
- Agency approvals 211
- Regulatory notices 212
- Important safety instructions 214
- B-216 User’s Reference Guide 216
- 218 User’s Reference Guide 218
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