Lancom 800+ User Manual

Also see for 800+: Installation guide

Contents

Lancom 800+ User Manual Manual pdf 49 page image

LANCOM 800+ – LANCOM DSL/I- 10+ – LANCOM DSL/I- 1611 Office Chapter 5: Linking two networks49EN The password for the ISDN connection is an alternative to the use ofthe ISDN caller ID. It is always used to authenticate callers that do notsend an ISDN caller ID. The exact same password must be entered on bothsides. It is used for calls in both directions. The Shared Secret is the central password for security within the VPN.The exact same password has to be entered on both sides Data compression increases the transfer speed of the connection at noadditional cost. This is completely unlike the bundling of two ISDN- chan-nels with MLPPP (Multi Link PPP): The transfer rate will be doubled butthere will also be additional telephone costs for two connections.5.1.2 Settings for the TCP/IP routerIn TCP/IP networks, addressing has a special significance. Please note thattwo interconnected networks are logically separate from one another. Eachmust therefore have its own network number (in our example, '10.0.1.x' and'10.0.2.x'). These network numbers may not be identical.Unlike when accessing the Internet, all of the IP addresses in the involved net-works are visible on the remote side when coupling networks, not just thoseof the router. The computer with the IP address 10.0.2.10 in the branch officeLAN sees the server 10.0.1.2 in the headquarters and can access it (assumingit has the appropriate rights), and vice versa.LAN of head office.IP: 10.0.1.0,Netmask: 255.255.255.0Domain: 'head.company'10.0.1.100(0123) 123456LAN of branch office.IP: 10.0.2.0,Netmask: 255.255.255.0Domain: 'branch.company'10.0.1.210.0.2.1010.0.2.100(0789) 654321'server.head.company''pc1.branch.comanyVPN or ISDNconnection