Reference Manual

NAME

dnsmap - turn DNS Mapping on or off

dnsmap [ifn [on|off]]

DNS mapping is a mechanism which allows hosts on a private LAN to use DNS Services even if the adddress of an actual DNS Server is unknown. The mechanism works as follows:
 

When DNS mapping is on for a particular private interface ifn, then all DNS requests sent by private hosts to NAT32's IP address are redirected to a DNS Server known to NAT32 (see setns).

When a response arrives, NAT32 forwards it to the private host after adjusting its source address so that it appears to have come from NAT32.

If DNS mapping is on for a particular interface, then private hosts on that network should be configured to use the NAT32's private IP Address as the DNS Server. If private hosts are DHCP-configured, then NAT32's DHCP Server will automatically configure the DNS settings of the machines correctly.

DHCP Server, Interface Configuration, Name Server, Set Name Server