Kerio-tech Firewall6 Manuel d'utilisateur Page 154
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Chapter 12
HTTP and FTP filtering
WinRoute provides a wide range of features to filter traffic using HTTP and FTP protocols.
These protocols are the most spread and the most used in the Internet.
Here are the main purposes of HTTP and FTP content filtering:
• to block access to undesirable Web sites (i.e. pages that do not relate to employees’
work)
• to block certain types of files (i.e. illegal content)
• to block or to limit viruses, worms and Trojan horses
Let’s focus on filtering options featured by WinRoute. For their detailed description, read the
following chapters.
HTTP protocol
— Web pages filtering:
• access limitations according to URL (substrings contained in URL addresses)
• blocking of certain HTML items (i.e. scripts, ActiveX objects, etc.)
• filtering based on classification by the ISS OrangeWeb Filter module (worldwide
Website classification database)
• limitations based on occurrence of denied words (strings)
• antivirus control of downloaded objects
FTP protocol
— control of access to FTP servers:
• access to certain FTP servers is denied
• limitations based on or file names
• transfer of files is limited to one direction only (i.e. download only)
• certain FTP commands are blocked
• antivirus control of transferred files
Note: WinRoute provides only tools for filtering and access limitations. Decisions on which
websites and files will be blocked must be made by the administrator (or another qualified
person).
- Kerio WinRoute Firewall 6 1
- Contents 3
- Quick Checklist 7
- Introduction 9
- 2.2 Conflicting software 11
- 2.3 Installation 13
- Sharing 17
- 2.4 WinRoute Components 18
- 2.5 WinRoute Engine Monitor 19
- 2.7 Configuration Wizard 22
- WinRoute Administration 24
- 3.2 View Settings 27
- Chapter 4 29
- 4.2 License information 30
- 4.6 User counter 42
- Network interfaces 44
- Figure 5.2 Editing interfaces 47
- Internet Connection 49
- 6.3 Connection Failover 58
- Chapter 6 Internet Connection 60
- 6.4 Network Load Balancing 62
- Traffic Policy 67
- 7.2 How traffic rules work 74
- 7.4 Basic Traffic Rule Types 87
- 7.5 Policy routing 93
- 7.8 Use of Full cone NAT 98
- 7.9 Media hairpinning 100
- Chapter 8 102
- 8.1 DNS Forwarder 102
- 8.2 DHCP server 108
- 8.4 Proxy server 120
- 8.5 HTTP cache 123
- Bandwidth Limiter 130
- User Authentication 137
- Web Interface 141
- 11.2 User logon and logout 146
- 11.4 User preferences 150
- 11.5 Dial-up 153
- HTTP and FTP filtering 154
- 12.2 URL Rules 155
- 12.6 FTP Policy 171
- Antivirus control 176
- 13.3 HTTP and FTP scanning 181
- 13.4 Email scanning 185
- Definitions 189
- 14.2 Time Intervals 190
- 14.3 Services 192
- 14.4 URL Groups 196
- User Accounts and Groups 199
- 15.2 Local user accounts 202
- Step 1 — basic information 203
- 15.5 User groups 219
- Chapter 16 223
- 16.2 Update Checking 224
- Advanced security features 227
- Other settings 233
- 18.3 Relay SMTP server 238
- Status Information 240
- 19.3 Alerts 251
- Figure 19.11 Alert Definitions 252
- Basic statistics 256
- Figure 20.1 User statistics 257
- 20.2 Interface statistics 258
- Chapter 21 262
- 21.4 Accounting period 270
- 21.5 Overall View 272
- 21.6 User statistics 276
- 21.7 Users’ Activity 277
- 21.8 Users by Traffic 282
- 21.9 Top Visited Websites 283
- Chapter 22 288
- 22.1 Log settings 288
- Figure 22.1 Log settings 289
- 22.2 Logs Context Menu 291
- 22.3 Alert Log 295
- 22.4 Config Log 295
- 22.5 Connection Log 297
- 22.6 Debug Log 298
- 22.7 Dial Log 299
- 22.8 Error Log 301
- 22.9 Filter Log 303
- 22.10 Http log 304
- 22.11 Security Log 306
- 22.12 Sslvpn Log 307
- 22.13 Warning Log 308
- 22.14 Web Log 309
- Kerio VPN 310
- 23.1 VPN Server Configuration 311
- Chapter 23 Kerio VPN 330
- Paris branch office server 360
- Kerio Clientless SSL-VPN 363
- Chapter 25 371
- Technical support 386
- 26.2 Tested in Beta version 387
- 26.3 Contacts 387
- Legal Notices 389
- Used open-source libraries 390
- Glossary of terms 392
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