Administrator's Guide - Kerio Software Archive

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HTTP and FTP filtering The is rated by Kerio Web Filter rating system is considered the key parameter. The URL of each opened page will be rated by the Kerio Web Filter module. Access to each page matching with a rating category included in the database will be denied. Use the Select Rating button to open a dialog where Kerio Web Filter rating categories can be chosen. Select the Job Search / Job offers rating category (pages including job offers). Figure 13.8 Selection of Kerio Web Filter categories Note: 1. You can define multiple URL rules that will use the Kerio Web Filter rating technology. Multiple categories may be used for each rule. 2. We recommend you to unlock rules that use the Kerio Web Filter rating system (the Users can Unlock this rule option in the Advanced tab). This option will allow users to unlock pages blocked for incorrect classification. All unlock queries are logged into the Filter log — here you can monitor whether unlock queries were appropriate or not. 180
13.4 Web content filtering by word occurrence 13.4 Web content filtering by word occurrence Kerio Control can also filter web pages that include undesirable words. This is the filtering principle: Denied words are matched with values, called weight (represented by a whole positive integer). Weights of these words contained in a required page are summed (weight of each word is counted only once regardless of how many times the word is included in the page). If the total weight exceeds the defined limit (so called threshold value), the page is blocked. So called forbidden words are used to filter out web pages containing undesirable words. URL rules (see chapter 13.2) define how pages including forbidden content will be handled. Warning: Definition of forbidden words and threshold value is ineffective unless corresponding URL rules are set! Definition of rules filtering by word occurrence First, suppose that some forbidden words have been already defined and a threshold value has been set (for details, see below). On the URL Rules tab under Configuration → Content Filtering → HTTP Policy, create a rule (or a set of rules) to allow access to the group of web pages which will be filtered by forbidden words. Go to the Content Rules tab under HTTP Rule to enable the web content filter. Take a rule that will filter all web sites by occurrence of forbidden words as an example. • On the General tab, allow all users to access any web site. • On the Content Rules tab, check the Deny Web pages containing... option to enable filtering by word occurrence. 181
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Kerio Control Administrator’s Gui
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Contents 1 Quick Checklist . . . .
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13 HTTP and FTP filtering . . . . .
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26 Technical support . . . . . . .
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8. Enable the intrusion prevention
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2.2 Conflicting software Warning: S
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2.3 System requirements met). 2.3 S
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2.4 Installation - Windows • TCP/
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2.4 Installation - Windows Warning:
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2.5 Initial configuration wizard (W
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2.6 Upgrade and Uninstallation - Wi
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2.7 Installation - Software Applian
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2.7 Installation - Software Applian
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2.10 Kerio Control Engine Monitor (
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2.11 The firewall’s console (Soft
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3.1 Kerio Control Administration we
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3.2 Administration Console - the ma
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3.3 Administration Console - view p
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Chapter 4 License and Registration
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4.3 License information User is def
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4.4 Registration of the product in
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4.6 Subscription / Update Expiratio
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Chapter 5 Network interfaces Kerio
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5.3 Viewing and editing interfaces
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5.3 Viewing and editing interfaces
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5.5 Advanced dial-up settings Figur
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5.6 Supportive scripts for link con
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6.1 Persistent connection with a si
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6.1 Persistent connection with a si
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6.2 Connection with a single leased
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6.3 Connection Failover Advanced di
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6.3 Connection Failover Figure 6.8
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6.4 Network Load Balancing Note: 1.
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6.4 Network Load Balancing On the t
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6.4 Network Load Balancing Hint: Sp
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Chapter 7 Traffic Policy Traffic Ru
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7.1 Network Rules Wizard Step 4 —
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7.1 Network Rules Wizard Figure 7.5
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7.1 Network Rules Wizard Note: In t
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7.3 Definition of Custom Traffic Ru
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7.4 Basic Traffic Rule Types Do not
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7.4 Basic Traffic Rule Types Figure
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7.4 Basic Traffic Rule Types Transl
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7.5 Policy routing 7.5 Policy routi
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7.6 User accounts and groups in tra
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7.7 Partial Retirement of Protocol
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7.8 Use of Full cone NAT as possibl
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7.9 Media hairpinning the port of t
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8.1 Network intrusion prevention sy
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8.1 Network intrusion prevention sy
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8.2 MAC address filtering Figure 8.
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8.3 Special Security Settings Anti-
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8.4 P2P Eliminator Figure 8.5 Detec
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8.4 P2P Eliminator The Define servi
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9.1 DNS module of the firewall’s
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9.1 DNS module Figure 9.2 Editor of
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Page 155 and 156: 10.2 Bandwidth Limiter configuratio
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Page 159 and 160: 10.3 Detection of connections with
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Page 165 and 166: 12.1 Web interface and certificate
Page 167 and 168: 12.2 User authentication at the web
Page 169 and 170: Chapter 13 HTTP and FTP filtering K
Page 171 and 172: 13.2 URL Rules Rules in this sectio
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Page 185 and 186: 13.5 FTP Policy Weight Word weight
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Page 191 and 192: 14.2 How to choose and setup antivi
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Page 203 and 204: 14.5 Scanning of files transferred
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16.4 User accounts in Active Direct
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16.4 User accounts in Active Direct
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16.5 User groups Note: In case of u
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16.5 User groups Using the Add and
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Chapter 17 Administrative settings
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17.3 Update Checking Figure 17.2 Tr
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17.3 Update Checking Last update ch
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18.1 Routing table Route Types The
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18.2 Universal Plug-and-Play (UPnP)
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18.3 Relay SMTP server 18.3 Relay S
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Chapter 19 Status Information Kerio
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19.1 Active hosts and connected use
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19.2 Network connections overview
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19.2 Network connections overview F
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19.4 Alerts • Session duration.
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19.4 Alerts • Connection failover
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19.4 Alerts Click an event to view
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20.1 Volume of transferred data and
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20.2 Interface statistics Figure 20
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20.2 Interface statistics Figure 20
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21.1 Monitoring and storage of stat
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21.2 Settings for statistics and qu
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21.3 Connection to StaR and viewing
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21.3 Connection to StaR and viewing
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22.1 Log settings Figure 22.1 Log s
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22.1 Log settings Figure 22.3 Syslo
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22.2 Logs Context Menu • Target f
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22.3 Alert Log Figure 22.7 Highligh
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22.5 Connection Log A typical examp
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22.6 Debug Log The expression must
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22.7 Dial Log 3. Disconnection caus
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22.9 Filter Log • 8000-8099 — H
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22.10 Http log Packet log example:
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22.11 Security Log An example of Ht
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22.11 Security Log Example: [17/Jul
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22.13 Warning Log Events causing di
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Chapter 23 Kerio VPN Kerio Control
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23.1 VPN Server Configuration Figur
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23.1 VPN Server Configuration the V
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23.1 VPN Server Configuration Kerio
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23.3 Interconnection of two private
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23.4 Exchange of routing informatio
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23.5 Example of Kerio VPN configura
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23.6 Example of a more complex Keri
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24.1 Kerio Control SSL-VPN configur
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Chapter 25 Specific settings and tr
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25.3 Automatic user authentication
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25.3 Automatic user authentication
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25.4 FTP over Kerio Control proxy s
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25.5 Internet links dialed on deman
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The text file will be stored in the
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Appendix B Used open source items K
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Copyright © 2005 Harald Welte Dist
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Glossary of terms ActiveX This Micr
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Ident The Ident protocol is used fo
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Policy routing Advanced routing tec
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TCP Transmission Control Protocol i
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dial-up 64 dialing scripts 21, 58 h
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S service 89, 207 SIP 210 SSL-VPN 3
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