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ProSecure Web/Email Security Threat Management (STM) Appliance Reference Manual
4-26 Content Filtering and Optimizing Scans
v1.0, September 2009
3. Click Apply to save your settings.
Configuring Web Content Filtering
If you want to restrict internal LAN users from access to certain types of information and objects
on the Internet, use the STM’s content filtering and Web objects filtering. With the exception of the
Web content categories that are mentioned in “Default E-mail and Web Scan Settings” on
page 4-2, all requested traffic from any Web site is allowed. You can specify a message such as
“Blocked by NETGEAR” that is displayed on screen if a user attempts to access a blocked site (see
the Notification Settings section that is described at the bottom of Table 4-11 on page 4-30).
Several types of Web content blocking are available:
• File extension blocking. You can block files based on their extension. Such files can include,
executable files, audio and video files, and compressed files.
• Web object blocking. You can block the following Web objects: embedded objects (ActiveX,
Java, Flash), proxies, and cookies, and you can disable Java scripts. However, Web sites that
are on the whitelist (see “Configuring Web URL Filtering” on page 4-32) are never subject to
Web object blocking.
• Web category blocking. You can block entire Web categories because their content is
undesired, offensive, or not relevant, or simply to reduce traffic.
Note: You can customize this text. Make sure that you keep the %VIRUSINFO% meta word in the text to
enable the STM to insert the proper malware threat information. In addition to the %VIRUSINFO% meta
word, you can insert the following meta words in your customized message:
%TIME%, %PROTOCOL%, %FROM%, %TO%, %SUBJECT%, %FILENAME%, %ACTION%,
%VIRUSNAME%.
The text is displayed on the Malware Scan screen with HTML tags. Click Preview to open a screen that
displays the notification text in HTML format.
Note: You can bypass any type of Web blocking for trusted domains by adding the exact
matching domain names to the trusted host list (see “Specifying Trusted Hosts” on
page 4-39). Access to the domains on the trusted host list is allowed for PCs in the
groups for which file extension, object, or category blocking, or a combination of
these types of Web blocking has been enabled.
Table 4-10. Malware Scan Settings (continued)
Setting Description
- ProSecure Web/Email 1
- Security Threat 1
- Management Appliance 1
- STM150/300/600 1
- Reference Manual 1
- Additional Copyrights 3
- Contents 7
- About This Manual 13
- How to Print This Manual 14
- Revision History 14
- Chapter 1 15
- Introduction 15
- What Can You Do with an STM? 16
- Key Features and Capabilities 17
- 1-4 Introduction 18
- Maintenance and Support 19
- STM Model Comparison 19
- 1-6 Introduction 20
- Figure 1-1 20
- Package Contents 21
- Hardware Features 21
- Front Panel Ports and LEDs 22
- Introduction 1-9 23
- Introduction 1-11 25
- 8) Pair 2 LEDs 26
- Introduction 1-13 27
- Rear Panel Features 28
- Introduction 1-15 29
- Figure 1-6 29
- STM150 Product Label 30
- STM300 Product Label 30
- Introduction 1-17 31
- Figure 1-9 31
- Using the Rack-Mounting Kit 32
- Chapter 2 33
- Your Network 33
- Server Group 34
- Segmented LAN Deployment 35
- Figure 2-3 36
- Logging In to the STM 37
- Figure 2-5 38
- Figure 2-6 39
- Figure 2-9 41
- Figure 2-10 42
- Figure 2-11 43
- Figure 2-12 44
- Figure 2-13 46
- Figure 2-14 49
- Figure 2-15 51
- Figure 2-16 53
- Update Settings 54
- Proxy Settings” on page 3-7 55
- Figure 2-18 56
- Figure 2-19 58
- Verifying Proper Installation 59
- 4. Click Register 61
- What to Do Next 62
- Chapter 3 63
- Figure 3-1 [STM600] 64
- Table 3-1 65
- Figure 3-4 68
- To configure the HTTP proxy: 70
- Figure 3-6 72
- Web Interface Timeout 73
- Figure 3-7 74
- Using an SNMP Manager 75
- Figure 3-8 76
- Table 3-6. SNMP Settings 76
- Supported MIB Browsers 77
- Backup Settings 78
- Restore Settings 79
- Updating the Software 81
- Figure 3-10 82
- Performing a Manual Update 83
- Figure 3-11 84
- Figure 3-12 84
- Figure 3-13 85
- Managing Digital Certificates 87
- Figure 3-15 88
- Managing Trusted Certificates 90
- Figure 3-17 91
- Figure 3-18 92
- Performance Management 93
- Chapter 4 97
- Configuring E-mail Protection 100
- Figure 4-2 102
- Figure 4-3 103
- Figure 4-4 105
- E-mail Content Filtering 107
- Figure 4-5 108
- Table 4-6 109
- Figure 4-6 112
- Figure 4-7 114
- Figure 4-8 116
- Figure 4-9 119
- Configuring Web Malware Scans 120
- Configuring Web URL Filtering 128
- Figure 4-14 129
- HTTPS Scan Settings 132
- Figure 4-16 133
- Figure 4-17) 134
- Specifying Trusted Hosts 135
- Figure 4-18 136
- Configuring FTP Scans 137
- Figure 4-19 138
- Table 4-15. FTP Scan Settings 138
- Setting Scanning Exclusions 143
- Figure 4-24 144
- Exception screen displays 145
- Table 4-17 145
- Chapter 5 151
- Configuring Groups 152
- Figure 5-1 153
- Table 5-1. Group Settings 153
- Editing Groups by Name 154
- Figure 5-3 155
- Configuring User Accounts 156
- Figure 5-4 157
- Table 5-4. User Settings 157
- Editing User Accounts 158
- Configuring Authentication 159
- Figure 5-7 160
- Figure 5-8 160
- Figure 5-9 163
- Figure 5-10 164
- Figure 5-14 166
- Table 5-5. LDAP Settings 167
- Figure 5-15 170
- Table 5-6. RADIUS Settings 170
- Figure 5-16 172
- Global User Settings 174
- Figure 5-18 175
- Figure 5-19 176
- Chapter 6 177
- Figure 6-1 178
- Table 6-3. Syslog Settings 182
- Clearing Logs 183
- Configuring Alerts 184
- Figure 6-5 185
- Table 6-4. Alerts Settings 185
- Web Usage 187
- Information 191
- Monitoring Web Usage 194
- Viewing System Status 195
- Figure 6-10 196
- Querying the Logs 198
- Figure 6-11 200
- Table 6-9. Log Query Settings 201
- Figure 6-12 206
- Figure 6-13 208
- Figure 6-14 211
- Figure 6-15 213
- Figure 6-16 213
- Figure 6-17 214
- Figure 6-18 215
- Figure 6-19 215
- Using Diagnostics Utilities 216
- Statistics Report 219
- Chapter 7 223
- Basic Functioning 224
- LAN or WAN Port LEDs Not On 225
- Figure 7-1 228
- Problems with Date and Time 229
- Using Online Support 230
- Installing Hot Fixes 231
- Figure 7-4 232
- 3. Click Submit 233
- Documentation from the menu 233
- Appendix A 235
- Appendix B 239
- Related Documents 239
- B-2 Related Documents 240
- Numerics 241
- Index-10 250
- Index-11 251
- Index-12 252
- Index-13 253
- Index-14 254
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