Administrator's Guide - Kerio Software Archive

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Kerio VPN Routes provided automatically Unless any custom routes are defined, the following rules apply to the interchange of routing information: • default routes as well as routes to networks with default gateways are not exchanged (default gateway cannot be changed for remote VPN clients and/or for remote endpoints of a tunnel), • routes to subnets which are identical for both sides of a tunnel are not exchanged (routing of local and remote networks with identical IP ranges is not allowed). • other routes (i.e. routes to local subnets at remote ends of VPN tunnels excluding the cases described above, all other VPN and all VPN clients) are exchanged. Note: As implied from the description provided above, if two VPN tunnels are created, communication between these two networks is possible. The traffic rules can be configured so that connection to the local network will be disabled for both these remote networks. Update of routing tables Routing information is exchanged: • when a VPN tunnel is connected or when a VPN client is connected to the server, • when information in a routing table at any side of the tunnel (or at the VPN server) is changed, • periodically, every 10 minutes. The timeout starts upon each update (regardless of the update reason). 23.5 Example of Kerio VPN configuration: company with a filial office This chapter provides a detailed exemplary description on how to create an encrypted tunnel connecting two private networks using the Kerio VPN. This example can be easily customized. The method described can be used in cases where no redundant routes arise by creating VPN tunnels (i.e. multiple routes between individual private networks). Configuration of VPN with redundant routes (typically in case of a company with two or more filials) is described in chapter 23.6. This example describes a more complicated pattern of VPN with access restrictions for individual local networks and VPN clients. An example of basic VPN configuration is provided in the Kerio Control — Step By Step Configuration document. 322
23.5 Example of Kerio VPN configuration: company with a filial office Specification Supposing a company has its headquarters in New York and a branch office in London. We intend to interconnect local networks of the headquarters by a VPN tunnel using the Kerio VPN. VPN clients will be allowed to connect to the headquarters network. The server (default gateway) of the headquarters uses the public IP address 85.17.210.230 (DNS name is newyork.company.com), the server of the branch office uses a dynamic IP address assigned by DHCP. The local network of the headquarters consists of two subnets, LAN 1 and LAN 2. headquarters uses the company.com DNS domain. The The network of the branch office consists of one subnet only (LAN). The branch office filial.company.com. Figure 23.13 provides a scheme of the entire system, including IP addresses and the VPN tunnels that will be built. Figure 23.13 Example — interconnection of the headquarter and a filial office by VPN tunnel (connection of VPN clients is possible) Suppose that both networks are already deployed and set according to the figure and that the Internet connection is available. Traffic between the network of the headquarters, the network of the branch office and VPN clients will be restricted according to the following rules: 1. VPN clients can connect to the LAN 1 and to the network of the branch office. 2. Connection to VPN clients is disabled for all networks. 323
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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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9.1 DNS module Figure 9.3 Specific
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9.2 DHCP server If the Do not forwa
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9.2 DHCP server Figure 9.5 DHCP ser
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9.2 DHCP server Leases IP scopes ca
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9.2 DHCP server Figure 9.13 DHCP se
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9.3 Dynamic DNS for public IP addre
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9.4 Proxy server Proxy Server Confi
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9.5 HTTP cache Note: The configurat
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9.5 HTTP cache other objects can be
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9.5 HTTP cache TTL TTL of objects m
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Chapter 10 Bandwidth Limiter The ma
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10.2 Bandwidth Limiter configuratio
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10.2 Bandwidth Limiter configuratio
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10.3 Detection of connections with
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11.1 Firewall User Authentication T
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11.1 Firewall User Authentication a
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12.1 Web interface and certificate
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12.2 User authentication at the web
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Chapter 13 HTTP and FTP filtering K
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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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25.5 Internet links dialed on deman
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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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