Administrator's Guide - Kerio Software Archive

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Firewall and Intrusion Prevention System Parameters for detection of P2P networks Click Advanced to set parameters for P2P detection. Figure 8.7 Settings of P2P networks detection Ports of P2P networks List of ports which are exclusively used by P2P networks. These ports are usually ports for control connections — ports (port ranges) for data sharing can be set by users themselves. Ports in the list can be defined by port numbers or by port ranges. Individual values are separated by commas while dash is used for definition of ranges. Number of suspicious connections Big volume of connections established from the client host is a typical feature of P2P networks (usually one connection for each file). The Number of connections value defines maximal number of client’s network connections that must be reached to consider the traffic as suspicious. The optimum value depends on circumstances (type of user’s work, frequently used network applications, etc.) and it must be tested. If the value is too low, the system can be unreliable (users who do not use P2P networks might be suspected). If the value is too high, reliability of the detection is decreased (less P2P networks are detected). Safe services Certain “legitimate” services may also show characteristics of traffic in P2P networks (e.g. big number of concurrent connections). To ensure that traffic is not detected incorrectly and users of these services are not persecuted by mistake, it is possible to define list of so called secure services. These services will be excluded from detection of P2P traffic. 122
8.4 P2P Eliminator The Define services... button opens a dialog where services can be define that will not be treated as traffic in P2P network. All services defined in Configuration → Definitions → Services are available (for details, refer to chapter sect-services"/>). Warning: Default values of parameters of P2P detection were set with respect to long-term testing. As already mentioned, it is not always possible to say that a particular user really uses P2P networks or not which results only in certain level of probability. Change of detection parameters may affect its results crucially. Therefore, it is recommended to change parameters of P2P networks detection only in legitimate cases (e.g. if a new port number is detected which is used only by a P2P network and by no legitimate application or if it is found that a legitimate service is repeatedly detected as a P2P network). 123
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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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Page 107 and 108: 7.7 Partial Retirement of Protocol
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Page 117 and 118: 8.2 MAC address filtering Figure 8.
Page 119 and 120: 8.3 Special Security Settings Anti-
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Page 125 and 126: 9.1 DNS module of the firewall’s
Page 127 and 128: 9.1 DNS module Figure 9.2 Editor of
Page 129 and 130: 9.1 DNS module Figure 9.3 Specific
Page 131 and 132: 9.2 DHCP server If the Do not forwa
Page 133 and 134: 9.2 DHCP server Figure 9.5 DHCP ser
Page 139 and 140: 9.2 DHCP server Leases IP scopes ca
Page 141 and 142: 9.2 DHCP server Figure 9.13 DHCP se
Page 143 and 144: 9.3 Dynamic DNS for public IP addre
Page 145 and 146: 9.4 Proxy server Proxy Server Confi
Page 147 and 148: 9.5 HTTP cache Note: The configurat
Page 149 and 150: 9.5 HTTP cache other objects can be
Page 151 and 152: 9.5 HTTP cache TTL TTL of objects m
Page 153 and 154: Chapter 10 Bandwidth Limiter The ma
Page 155 and 156: 10.2 Bandwidth Limiter configuratio
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Page 159 and 160: 10.3 Detection of connections with
Page 161 and 162: 11.1 Firewall User Authentication T
Page 163 and 164: 11.1 Firewall User Authentication a
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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13.2 URL Rules for example a rule a
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13.2 URL Rules • A page informing
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13.3 Content Rating System (Kerio W
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13.3 Content Rating System (Kerio W
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13.4 Web content filtering by word
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13.4 Web content filtering by word
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13.5 FTP Policy Weight Word weight
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13.5 FTP Policy Open the General ta
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13.5 FTP Policy Scan content for vi
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14.2 How to choose and setup antivi
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14.2 How to choose and setup antivi
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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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