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FVS338 ProSafe VPN Firewall 50 Reference Manual
4-10 Firewall Protection and Content Filtering
v1.0, September 2006
Attack Checks
This screen allows you to specify whether or not the router should be protected against common
attacks in the LAN and WAN networks. The various types of attack checks are listed on the
Attack Checks screen and defined below:
• WAN Security Checks
– Respond To Ping On Internet Ports. When enabled, the router will respond to a “Ping”
from the Internet. This can be used as a diagnostic tool and shouldn’t be used unless you
have a specific diagnostic reason to do so.
– Enable Stealth Mode. If enabled, the router will not respond to port scans from the WAN,
thus making it less susceptible to discovery and attacks.
– Block TCP Flood. A SYN flood is a form of denial of service attack in which an attacker
sends a succession of SYN requests to a target system. When the system responds, the
attacker doesn’t complete the connections, thus leaving the connection half-open and
flooding the server with SYN messages. No legitimate connections can then be made.
When enabled, the router will drop all invalid TCP packets and will be protected from a
SYN flood attack.
Figure 4-4
- FVS338 ProSafe VPN 1
- Firewall 50 Reference 1
- Additional Copyrights 3
- Contents 7
- About This Manual 13
- How to Use This Manual 14
- How to Print this Manual 14
- Revision History 15
- Chapter 1 17
- Introduction 17
- Security 18
- Extensive Protocol Support 19
- Trend Micro Integration 20
- Package Contents 21
- Router Hardware Components 21
- Router Front Panel 22
- Router Rear Panel 23
- Factory Default Login 24
- Introduction 1-9 25
- Figure 1-5 25
- 1-10 Introduction 26
- Chapter 2 27
- Figure 2-1 28
- Figure 2-2 29
- Figure 2-3 30
- Figure 2-4 31
- Figure 2-5 34
- Figure 2-6 35
- Figure 2-7 36
- Figure 2-8 39
- Configuring the WAN Mode 41
- Figure 2-9 43
- Chapter 3 45
- LAN Configuration 45
- 3-2 LAN Configuration 46
- Figure 3-1 46
- LAN Configuration 3-3 47
- Figure 3-2 48
- 3-4 LAN Configuration 48
- Managing Groups and Hosts 49
- 3-6 LAN Configuration 50
- LAN Configuration 3-7 51
- Figure 3-3 51
- Configuring Static Routes 52
- Static Route Example 53
- RIP Configuration 54
- LAN Configuration 3-11 55
- Figure 3-5 55
- 3-12 LAN Configuration 56
- LAN Configuration 3-13 57
- Figure 3-6 57
- 3-14 LAN Configuration 58
- Chapter 4 59
- Services-Based Rules 60
- Figure 4-1 64
- Setting LAN WAN Rules 65
- Figure 4-3 67
- Attack Checks 68
- Inbound Rules Examples 70
- Figure 4-7 71
- Figure 4-8 72
- Figure 4-9 73
- Adding Customized Services 75
- Figure 4-12 76
- Figure 4-13 78
- Figure 4-14 80
- Enabling Source MAC Filtering 81
- Setting Up Port Triggering 82
- Figure 4-16 83
- Figure 4-17 84
- Figure 4-18 86
- Figure 4-19 88
- Administrator Information 89
- Chapter 5 91
- Virtual Private Networking 91
- IKE Policies 94
- VPN Policies 95
- VPN Policy Operation 96
- VPN Policy Table 96
- VPN Tunnel Connection Status 97
- Figure 5-1 99
- Figure 5-2 99
- Figure 5-3 100
- Figure 5-4 100
- Configuring the FVX538 101
- Testing the Connection 102
- Configuring the FVS338 103
- Configuring the VPN Client 104
- Figure 5-8 105
- Figure 5-9 106
- Figure 5-10 107
- Figure 5-11 107
- Figure 5-12 108
- Figure 5-13 108
- Figure 5-15 110
- User Database Configuration 112
- RADIUS Client Configuration 113
- (ModeConfig) 115
- ModeConfig Operation 116
- Setting Up ModeConfig 116
- Figure 5-19 117
- Figure 5-20 119
- Figure 5-21 120
- Figure 5-22 121
- Figure 5-23 122
- Figure 5-24 122
- Certificates 123
- Self Certificates 124
- Figure 5-26 126
- Chapter 6 129
- Router and Network Management 129
- Administration 135
- Figure 6-1 136
- Figure 6-2 137
- Using a SNMP Manager 139
- Figure 6-3 140
- Figure 6-4 142
- Setting the Time Zone 143
- Monitoring the Router 144
- Figure 6-6 145
- Figure 6-7 146
- Figure 6-8 147
- Monitoring Attached Devices 148
- Figure 6-10 149
- Figure 6-11 150
- Monitoring WAN Ports Status 151
- Item Description 152
- VPN Logs 153
- DHCP Log 153
- Performing Diagnostics 154
- Figure 6-16 155
- Chapter 7 157
- Troubleshooting 157
- LEDs Never Turn Off 158
- Troubleshooting 7-3 159
- 7-4 Troubleshooting 160
- Troubleshooting 7-5 161
- 7-6 Troubleshooting 162
- Problems with Date and Time 163
- 7-8 Troubleshooting 164
- Appendix A 165
- Appendix B 169
- Related Documents 169
- B-2 Related Documents 170
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