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ProSafe Gigabit 8 Port VPN Firewall FVS318G Reference Manual
Firewall Protection and Content Filtering 4-5
v1.1, August 2010
Inbound Rules (Port Forwarding)
Because the VPN firewall uses Network Address Translation (NAT), your network presents only
one IP address to the Internet and outside users cannot directly address any of your local
computers. However, by defining an inbound rule you can make a local server (for example, a Web
server or game server) visible and available to the Internet. The rule tells the VPN firewall to direct
inbound traffic for a particular service to one local server based on the destination port number.
This is also known as port forwarding.
Whether or not DHCP is enabled, how the PCs will access the server’s LAN address impacts the
inbound rules. For example:
• If your external IP address is assigned dynamically by your ISP (DHCP enabled), the IP
address may change periodically as the DHCP lease expires. Consider using dynamic DNS so
that external users can always find your network (see “Configuring Dynamic DNS” on page 2-
11).
• If the IP address of the local server PC is assigned by DHCP, it may change when the PC is
rebooted. To avoid this, use the Reserved IP address feature to keep the PC’s IP address
constant (see “Setting Up DHCP Address Reservation” on page 3-9).
• Local PCs must access the local server using the PCs’ local LAN address. Attempts by local
PCs to access the server using the external WAN IP address will fail.
Bandwidth
Profile
Bandwidth Limiting determines the way in which the data is sent to or from your host. The
purpose of bandwidth limiting is to provide a solution for limiting the outgoing or incoming
traffic, thus preventing the LAN users for consuming all the bandwidth of your Internet
connection. For more information, see See “Creating Bandwidth Profiles” on page 4-27.
Note: Bandwidth limiting does not apply to the DMZ interface.
NAT IP The settings that specify whether the source address of the outgoing packets on the
WAN should be assigned the address of the WAN interface or the address of a different
interface. The options are:
• WAN Interface Address. All the outgoing packets on the WAN are to the address of
the assigned WAN interface.
• Single Address. All the outgoing packets on the WAN are assigned the specified IP
address, for example, a secondary WAN address that you have configured.
Note: See “Configuring Port Triggering” on page 4-37 for yet another way to allow
certain types of inbound traffic that would otherwise be blocked by the VPN
firewall.
Table 4-1. Outbound Rules (continued)
Item Description
- ProSafe Gigabit 8 Port 1
- VPN Firewall FVS318G 1
- Reference Manual 1
- Additional Copyrights 3
- Contents 7
- About This Manual 13
- How to Print This Manual 14
- Revision History 14
- About This Manual xv 15
- Chapter 1 17
- Introduction 17
- 1-2 Introduction 18
- Security Features 19
- Extensive Protocol Support 20
- Package Contents 21
- 1-6 Introduction 22
- Figure 1-1 22
- Table 1-1. LED Descriptions 22
- Introduction 1-7 23
- Figure 1-2 23
- Qualified Web Browsers 24
- Chapter 2 25
- Logging into the VPN Firewall 26
- Navigating the Menus 27
- Figure 2-2 28
- Figure 2-3 29
- Figure 2-4 30
- Figure 2-5 31
- Figure 2-6 32
- Configuring the WAN Mode 33
- Configuring Dynamic DNS 35
- Figure 2-10 37
- Chapter 3 39
- LAN Configuration 39
- 3-2 LAN Configuration 40
- LAN Configuration 3-3 41
- Figure 3-1 41
- 3-4 LAN Configuration 42
- LAN Configuration 3-5 43
- Creating the Network Database 44
- Viewing the Network Database 45
- 3-8 LAN Configuration 46
- LAN Configuration 3-9 47
- Figure 3-3 47
- 3-10 LAN Configuration 48
- Figure 3-4 48
- LAN Configuration 3-11 49
- 3-12 LAN Configuration 50
- Figure 3-5 50
- LAN Configuration 3-13 51
- Configuring Static Routes 52
- LAN Configuration 3-15 53
- Figure 3-6 53
- Figure 3-7 53
- Static Route Example 54
- LAN Configuration 3-17 55
- Figure 3-8 55
- 3-18 LAN Configuration 56
- Chapter 4 57
- Services-Based Rules 59
- ., or an address range 62
- Figure 4-1 64
- Configuring LAN WAN Rules 65
- Figure 4-2 66
- Figure 4-3 67
- Configuring DMZ WAN Rules 68
- Configuring LAN DMZ Rules 69
- Figure 4-6 70
- Figure 4-7 70
- Inbound Rules Examples 71
- Figure 4-9 72
- Figure 4-10 73
- Outbound Rules Example 75
- Attack Checks 76
- Setting Session Limits 78
- Figure 4-15 79
- Adding Customized Services 80
- Figure 4-16 81
- Figure 4-17 82
- Creating Bandwidth Profiles 83
- Figure 4-18 84
- Figure 4-19 84
- Figure 4-20 86
- To enable Content Filtering: 88
- Figure 4-22 90
- Figure 4-23 92
- Configuring Port Triggering 93
- Figure 4-24 94
- Figure 4-25 95
- Figure 4-26 96
- Figure 4-27 96
- Administrator Tips 98
- Chapter 5 99
- Virtual Private Networking 99
- Figure 5-1 100
- Figure 5-2 100
- Figure 5-3 102
- Figure 5-4 102
- Figure 5-5 103
- Figure 5-6 104
- Figure 5-7 105
- Figure 5-8 105
- Figure 5-9 106
- Figure 5-10 107
- Figure 5-11 108
- Figure 5-12 109
- Figure 5-13 110
- Figure 5-14 110
- Figure 5-15 111
- Table 5-1 111
- Figure 5-16 112
- Managing VPN Policies 113
- Figure 5-18 114
- Figure 5-19 116
- Configuring VPN Policies 121
- Figure 5-20 122
- Figure 5-21 124
- Managing Certificates 128
- Figure 5-22 131
- Figure 5-23 132
- Figure 5-24 132
- Figure 5-25 133
- Figure 5-26 134
- Figure 5-27 135
- Figure 5-28 136
- Figure 5-29 138
- Figure 5-30 139
- Figure 5-31 141
- Mode Config Operation 142
- Figure 5-32 143
- Figure 5-33 144
- Recommended settings are: 146
- • Encryption Algorithm: 3DES 146
- • Diffie-Hellman: Group 2 146
- • SA Lifetime: 3600 seconds 146
- Figure 5-35 148
- Figure 5-36 149
- Figure 5-37 150
- Figure 5-38 150
- Configuring Keepalives 151
- Figure 5-39 152
- Figure 5-40 153
- Figure 5-41 154
- Chapter 6 155
- Management 162
- Figure 6-1 163
- Adding External Users 164
- Figure 6-4 166
- Figure 6-5 168
- Using an SNMP Manager 170
- Figure 6-6 171
- Figure 6-7 172
- Figure 6-8 173
- Figure 6-9 176
- Monitoring System Performance 177
- Figure 6-10 178
- Viewing the Logs 180
- Enabling the Traffic Meter 181
- Figure 6-12 182
- Figure 6-13 183
- Figure 6-14 184
- Figure 6-15 185
- Figure 6-16 186
- Monitoring Attached Devices 187
- Figure 6-18 188
- Viewing the VPN Logs 189
- Viewing the DHCP Log 190
- Chapter 7 193
- Troubleshooting 193
- Power LED Not On 194
- LEDs Never Turn Off 194
- Troubleshooting 7-3 195
- 7-4 Troubleshooting 196
- Troubleshooting 7-5 197
- Problems with Date and Time 199
- 7-8 Troubleshooting 200
- Figure 7-1 200
- Troubleshooting 7-9 201
- Table 7-1. Diagnostics 201
- 7-10 Troubleshooting 202
- Appendix A 203
- Appendix B 207
- Two Factor Authentication 207
- B-2 Two Factor Authentication 208
- Two Factor Authentication B-3 209
- Figure B-1 209
- Figure B-2 209
- B-4 Two Factor Authentication 210
- Figure B-3 210
- Appendix C 211
- Related Documents 211
- C-2 Related Documents 212
- Numerics 213
- Index-10 222
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