VisionNet 202ER-4, User Manual

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VisionNet 202ER-4 ADSL Ethernet Router User’s Guide
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Why use DHCP?..........................................................49
VisionNet 202ER-4 DHCP modes ..............................50
Configuring DHCP Server ..................................................51
Viewing, modifying, and deleting address
pools, and excluding IP addresses from a
pool ...........................................................................54
Viewing current DHCP address assignments.............54
Configuring DHCP Relay....................................................56
Setting the DHCP Mode .....................................................57
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Configuring Network Address Translation ........59
Overview of NAT.................................................................59
Your Default NAT Setup .....................................................60
Viewing NAT Global Settings and Statistics .....................61
Viewing NAT Rules and Rule Statistics .............................64
Viewing Current NAT Translations.....................................65
Adding NAT Rules ..............................................................67
The napt rule: Translating between private and
public IP addresses ..................................................67
The rdr rule: Allowing external access to a
LAN computer...........................................................69
The basic rule: Performing 1:1 translations ................72
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........................................76
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Configuring DNS Server Addresses .................79
About DNS ..........................................................................79
Assigning DNS Addresses .................................................79
Configuring DNS Relay ......................................................78
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Configuring IP Routes .......................................81
Overview of IP Routes........................................................81
Comparing IP routing to telephone switching .............81