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ProSecure Web/Email Security Threat Management (STM) Appliance Reference Manual
4-14 Content Filtering and Optimizing Scans
v1.0, September 2009
3. Click Apply to save your settings.
Protecting Against E-mail Spam
The STM integrates multiple anti-spam technologies to provide comprehensive protection against
unwanted e-mail. You can enable all or a combination of these anti-spam technologies.
The STM implements these spam prevention technologies in the following order:
1. Whitelist. E-mails from the specified sources or to the specified recipients are not considered
spam and are accepted.
Filter by File Type
File Extension By default, the File Extension field lists the most common file extensions that are
detected. You can manually add or delete extensions. Use commas to separate
different extensions. You can enter a maximum of 40 file extensions; the maximum total
length of this field, excluding the delimiter commas, is 160 characters.
You can also use the pull-down menu to add predefined file extensions from a specific
category to the File Extension field:
• None. No file extensions are added to the File Extension field. This is the default
setting.
• Executables. Executable file extensions (exe, com, dll, so, lib, scr, bat, and cmd) are
added to the File Extension field.
• Audio/Video. Audio and video file extensions (wav, mp3, avi, rm, rmvb, wma, wmv,
mpg, mp4, and aac) are added to the File Extension field.
• Compressed Files. Compressed file extensions (zip, rar, gz, tar, and bz2) added to
the File Extension field.
Action SMTP
From the pull-down menu, specify an action when an e-mail attachment with a
file extension that is defined in the File Extension field is detected. The pull-
down menu selections and defaults are the same as the ones for the “Filter by
Password-Protected Attachments (ZIP, RAR, etc.)” section above.
POP3
IMAP
Filter by File Name
File Name Enter the file names that are detected. For example, to block the Netsky worm (which
normally arrives as netsky.exe), enter netsky.exe. You can enter a maximum of 20 file
names. Use commas to separate multiple file names. The maximum total length of this
field is 400 characters, excluding the delimiter commas.
Action SMTP
From the pull-down menu, specify an action when an e-mail attachment with a
name that is defined in the File Name field is detected. The pull-down menu
selections and defaults are the same as the ones for the “Filter by Password-
Protected Attachments (ZIP, RAR, etc.)” section above.
POP3
IMAP
Table 4-6. E-mail Filter Settings (continued)
Setting Description (or Subfield and 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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