SMC Networks WUSB32 - annexe 2 Manual page 5

Configuring Network Address Translation . . . . . 55
Overview of NAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Viewing NAT Global Settings
and Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Viewing NAT Rules and Rule Statistics . . . . . . . . . . . . . . . . . . 60
Viewing Current NAT Translations . . . . . . . . . . . . . . . . . . . . . . 61
Adding NAT Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
The NAPT rule: Translating between private
and public IP addresses . . . . . . . . . . . . . . . . . . . . . . . . . 64
The RDR rule: Allowing external access
to a LAN computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
The Basic rule: Performing 1:1 translations . . . . . . . . . . 71
The Filter rule: Configuring a BASIC rule
with additional criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
The Bimap rule: Performing two-way translations . . . . . 75
The Pass rule: Allowing specific addresses to pass through
untranslated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Configuring DNS Server Addresses . . . . . . . . . . 79
About DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Assigning DNS Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Configuring DNS Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Configuring IP Routes . . . . . . . . . . . . . . . . . . . . . 83
Overview of IP Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
IP routing versus telephone switching . . . . . . . . . . . . . . 83
Hops and gateways . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Using IP routes to define default gateways . . . . . . . . . . 85
Do I need to define IP routes? . . . . . . . . . . . . . . . . . . . . 85
Viewing the IP Routing Table . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Adding IP Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Configuring the Routing Information Protocol . 91
RIP Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
When should you configure RIP? . . . . . . . . . . . . . . . . . . 92
Configuring the ADSL Barricade's Interfaces with RIP . . . . . . . 92
Viewing RIP Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
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