Administrator's Guide - Kerio Software Archive

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Configuration of network services Once this information is defined, it is recommended to test update of dynamic DNS record by clicking on Update now. This verifies that automatic update works well (the server is available, set data is correct, etc.) and also updates the corresponding DNS record (IP address of the firewall could have changed since the registration or the last manual update). If an error occurs while attempting to update DNS record, an error is reported on the Dynamic DNS tab providing closer specification of the error (e.g. DDNS server is not available, user authentication failed, etc.). This report is also recorded in the error log. 9.4 Proxy server Even though the NAT technology used in Kerio Control enables direct access to the Internet from all local hosts, it contains a standard HTTP proxy server. Under certain conditions the direct access cannot be used or it is inconvenient . The following list describes the most common situations: 1. To connect from the Kerio Control host it is necessary to use the proxy server of your ISP. Proxy server included in Kerio Control can forward all queries to so called parent proxy server). 2. Internet connection is performed via a dial-up and access to certain Web pages is blocked (refer to chapter 13.2). If a direct connection is used, the line will be dialed before the HTTP query could be detected (line is dialed upon a DNS query or upon a client’s request demanding connection to a Web server). If a user connects to a forbidden web page, Kerio Control dials the line and blocks access to the page — the line is dialed but the page is not opened. Proxy server can receive and process clients’ queries locally. The line will not be dialed if access to the requested page is forbidden. 3. Kerio Control is deployed within a network with many hosts where proxy server has been used. It would be too complex and time-consuming to re-configure all the hosts. The Internet connection functionality is kept if proxy server is used — it is not necessary to edit configuration of individual hosts (or only some hosts should be re-configured). The Kerio Control’s proxy server can be used for HTTP, HTTPS and FTP protocols. Proxy server does not support the SOCKS protocol ( a special protocol used for communication between the client and the proxy server). Note: For detailed information on using FTP on the Kerio Control’s proxy server, refer to chapter 25.4. 144
9.4 Proxy server Proxy Server Configuration To configure proxy server parameters open the Proxy server tab in Configuration → Content Filtering → HTTP Policy. Figure 9.15 HTTP proxy server settings Enable non-transparent proxy server This option enables the HTTP proxy server in Kerio Control on the port inserted in the Port entry (3128 port is set by the default). Warning: If you use a port number that is already used by another service or application, Kerio Control will accept this port, however, the proxy server will not be able to run and the following report will be logged into the Error log (refer to chapter 22.8): failed to bind to port 3128: another application is using this port If you are not sure that the port you intend to use is free, click on the Apply button and check the Error log (check whether the report has or has not been logged) immediately. 145
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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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14.3 HTTP and FTP scanning Warning:
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14.3 HTTP and FTP scanning Use the
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14.4 Email scanning If only an aste
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14.4 Email scanning Figure 14.9 Set
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14.5 Scanning of files transferred
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15.2 Time Ranges Figure 15.2 IP gro
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15.3 Services Figure 15.4 Time rang
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15.3 Services Protocol The communic
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15.4 URL Groups Note: 1. Generally,
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15.4 URL Groups Examples:: • www.
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16.1 Viewing and definitions of use
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16.2 Local user accounts Accounts m
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16.2 Local user accounts Name Usern
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16.2 Local user accounts Step 3 —
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16.2 Local user accounts Figure 16.
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16.2 Local user accounts Within thi
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16.3 Local user database: external
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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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