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Chapter Nine: Advanced Installations IP filters
123
• DNS: Domain name system. Filtering DNS datagrams can cause disruptions in the ability to access
remote sites.
The following options are also available: NFS/RPC, News, Time (NTP), BOOTP, SNMP, ICMP, Ping
(ICMP), Ping Reply, ICMP Redir. For a description of these protocols, consult the appropriate RFC at the
site www.faqs.org.
8.
Activate the filter by clicking the box that appears to the right of the EDIT button.
9.
Click Save. This makes the filter operational.
Note
Unlike other configurations settings, you do not have to reset the DIVA LAN ISDN Modem to make
filters operational.
IP filtering examples
The examples in this section illustrate how to use filters to:
• Dropping incoming traffic from a specific network
• Allowing incoming traffic only from a specific network
• Blocking web surfing
Note
These examples assume that you have not enabled remote management. If enabled, the default filter
stack you see will only contain the single filter: “Forward all datagrams being sent from anywhere that contain
any protocol.“ If no filters are present, the only visible filter will be "Drop All". The "Forward all" filter is
active but invisible.
Dropping incoming traffic from a specific network
This example defines a filter to make sure that no traffic is accepted from a specific network. Assume the
network has the IP address 213.112.12.0.
Since the filter is applied against data from the Internet, it is defined for the ISP profile. Place this filter in the
third position in the stack.
- DIVA LAN ISDN Modem 1
- User’s Guide 1
- Table of Contents 3
- Chapter Three: 4
- Chapter Four: 4
- Chapter Five: 4
- Chapter Six: 5
- Chapter Seven: 5
- Chapter Eight: 6
- Chapter Nine: 6
- Chapter Ten: 6
- Appendix A: 7
- Appendix B: 7
- Appendix C: 7
- Appendix D: 8
- Introduction 9
- Internet 10
- Connecting more computers 12
- Total network security 12
- Summary of features 13
- Contacting customer services 14
- Getting Started 15
- 1. Installation overview 16
- 2. Prepare for installation 17
- Important ISDN concepts 19
- ISDN channel usage 19
- Multilink PPP 20
- Multilink PPP + BACP 20
- Multilink PPP + AO/DI 20
- Gather ISDN information 22
- Gather X.25 information 23
- Gather V.120 information 23
- Power Supply 24
- FaxPhone 24
- ISDN Wall Outlet 24
- To install Modem Monitor 26
- What’s next? 34
- Starting Modem Monitor 36
- Properties dialog box 37
- Utilities dialog box 38
- Options dialog box 38
- Status Viewer 39
- Profile table 40
- Utilities 40
- Chapter Four 41
- Saving configuration settings 43
- Getting help 43
- General settings 43
- Connection profile settings 43
- Editing the ISP profile 44
- Editing LAN settings 45
- Viewing status information 46
- Obtaining statistics 47
- Eicon\DIVA LAN ISDN Modem\ELM 48
- Resetting to factory defaults 49
- Minimizing ISDN Charges 50
- The Cost Control page 51
- Data call thresholds 52
- ISDN billing intervals 52
- Configuring BACP 53
- Configuring AO/DI 54
- X.25 on the D-channel 56
- Click Save 57
- Click Reset 57
- Setting ISDN active intervals 58
- Spoofing NetBIOS services 59
- Data compression 60
- Manual dialing 61
- Restricting analog calls 62
- Data over voice 63
- Traffic filtering 64
- Security 65
- Security features 66
- System password 67
- Automatic log out 67
- Network address translation 68
- Remote management 70
- Incoming data calls 72
- Call authentication 74
- Custom security features 78
- Setting up the Phone Ports 79
- Assigning phone numbers 80
- Call bumping 84
- Supplementary services 86
- Call Hold 87
- Call Waiting 87
- Notes on call bumping 89
- Call Forwarding 90
- Three-party Conference Call 91
- Terminal Portability 92
- Chapter Eight 93
- Overview 94
- 1. Gather information 95
- Minimizing your ISDN charges 100
- Configuring security features 101
- Advanced Installations 102
- Connection retries 103
- Using Modem Monitor 104
- Manual installation 105
- 106 106
- To create a VPN 108
- Connecting to the VPN 109
- Defining routes 110
- IP routes 111
- 117 117
- 118 118
- IP filters 119
- Default filters 120
- To define a filter 120
- Action Direction 121
- Source /Destination 121
- Location 121
- ProtocolAddress 121
- 122 122
- IP filtering examples 123
- 124 124
- Blocking web surfing 125
- 126 126
- Making a V.120 connection 127
- 128 128
- SecurID support 129
- 130 130
- Other Configuration Tools 131
- Configuration options 132
- Web interface 133
- TFTP interface 133
- 134 134
- DTMF interface 135
- Command line interface (CLI) 136
- 137 137
- About configuration context 138
- Connection profiles 138
- Default profiles 138
- Command line reference 138
- Loading firmware with the CLI 138
- 139 139
- TCP/IP Configuration 140
- Installing TCP/IP 141
- Configuring TCP/IP 141
- 142 142
- 143 143
- 144 144
- Configuring TCP/IP on an iMac 145
- Technical Information 146
- 147 147
- E1, E2, E3, E4 148
- 149 149
- 150 150
- Termination 151
- Command Line Reference 152
- Notational Conventions 153
- Commands 154
- Callback 155
- Call screening 156
- Call thresholds 157
- 158 158
- 159 159
- Ethernet 160
- 161 161
- 162 162
- 164 164
- 165 165
- 166 166
- IP routing 167
- IP various 167
- 168 168
- 169 169
- 170 170
- 171 171
- ISDN Access Time 172
- Logging and Mail Trace 173
- 174 174
- SHOW MLPPP CONFIGURATION 175
- 176 176
- 177 177
- 178 178
- 179 179
- 180 180
- Profiles 181
- 182 182
- 183 183
- 184 184
- Time Protocol 185
- 186 186
- V.120 Scripting 187
- 188 188
- 189 189
- Regulatory Information 190
- Safety Status: TNV-1 191
- Power Consumption 191
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