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ELSA LANCOM DSL/25 Dffice
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EN
4.6.9 IPX packet filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.7 IP routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
4.7.1 The IP routing table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.7.2 TCP/IP packet filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
4.7.3 Proxy ARP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
4.7.4 Local routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.7.5 Dynamic routing with IP RIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.7.6 IP masquerading (NAT, PAT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
4.7.7 DNS forwarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
4.7.8 Policy-based routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
4.8 Automatic address administration with DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
4.8.1 The DHCP server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
4.8.2 DHCP'on', 'off' or 'auto'?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
4.8.3 How are the addresses assigned? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
4.8.4 Configuring the DHCP server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
4.9 DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
4.9.1 What does a DNS server do? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
4.9.2 Setting up the DNS server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
4.10 NetBIOS proxy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
4.10.1 To the point: What is NetBIOS? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
4.10.2 Handling of NetBIOS packets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
4.10.3 Which preconditions must be fulfilled? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
4.10.4 Linking two Windows Networks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
4.10.5 Dial-up procedure for a remote access station . . . . . . . . . . . . . . . . . . . . . . 98
4.10.6 Search and find: the Network Neighborhood. . . . . . . . . . . . . . . . . . . . . . . . 99
4.11 ELSA CAPI Faxmodem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
4.11.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
4.11.2 Faxing with the ELSA CAPI Faxmodem. . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
4.12 Office communications and LANCAPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
4.12.1 ELSA LANCAPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
5 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
5.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
5.2 Warranty conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
5.3 Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
6 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Menu reference for ELSA LANCOM DSL/25 Office on CD only
20659_DE_0300.book Seite 7 Mittwoch, 17. Mai 2000 9:19 09
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