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===The role of the SME Server===
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===Die Rolle des SME Servers===
Your SME Server manages your connection to the Internet by routing Internet data packets to and from your network (which allows all the computers on your network to share a single Internet connection) and by providing security for your network, minimizing the risk of intrusions. When one of your local computers contacts the Internet, or is contacted by an outside machine on the Internet, the SME Server not only routes that connection, but seamlessly interposes itself into the communication. This prevents a direct connection from being established between an external computer on the Internet and a computer on your local network thereby significantly reducing the risk of intrusion onto your network.
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Ihr SME Server steuert die Verbindung in das Internet, indem Datenpakete vom lokalen Netz in das Internet geroutet werden und umgekehrt. Damit ist es möglich, mit nur einer zentralen Verbindung das ganze lokale Netz an das Internet anzubinden. Gleichzeitig ist die Verbindung deutlich sicherer und reduziert das Einbruchsrisiko in das lokale Netz deutlich. Ruft einer der lokalen Computer eine Internetverbindung auf oder wird von einem externen Computer aus dem Internet angesprochen, übernimmt der SME nicht nur die Aufgabe des Routing, sondern schaltet sich dauerhaft unmerklich dazwischen. Dabei wird eine direkte Verbindung zwischen lokalen Comptern mit dem Internet verhindert und das Risiko eines Einbruchs in das lokale Netz merklich reduziert.
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Your server also provides services - including e-mail, web access and a powerful file sharing and collaboration feature called "i-bays" - that allow you to communicate better internally and with the rest of the world using the Internet.
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Ihr Server stellt aber auch Dienste bereit - E-Mail, Webzugang und ein leistungsfähiges Konzept für den Dateiaustausch und reibungslose Zusammenarbeit im lokalen Netz und dem Internet, genannt "Information-Bays (i-bays)". Unter dem Begriff "Gateway" wird die Schnittstelle zwischen lokalem Computer, lokalem Netzwerk und dem Internet verstanden.
Throughout this user's guide, the word gateway is used to mean the computer that acts as the interface between your local, internal network and the external world.
      
[[Image:Server_and_gateway_mode.png]]
 
[[Image:Server_and_gateway_mode.png]]
>>++Server and Gateway Mode++]]
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>>++Server und Gateway Modus++]]
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If you prefer, you can also run your SME Server in "server-only" mode. In "server-only" mode, your server provides your network with services, but not the routing and security functions associated with the role of "gateway". The server-only mode is typically used for networks already behind a firewall. In that configuration, the firewall fulfills the role of gateway, providing routing and network security.
 
If you prefer, you can also run your SME Server in "server-only" mode. In "server-only" mode, your server provides your network with services, but not the routing and security functions associated with the role of "gateway". The server-only mode is typically used for networks already behind a firewall. In that configuration, the firewall fulfills the role of gateway, providing routing and network security.
  
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