Reference Guide

Relay commands 3 Configuration commands
100 NN47928-107
relay dns settings
The DNS relay function relays DNS messages between clients located on
LAN and a DNS server located on the WAN. The DNS relay function sets up
the BSGX4e as a proxy for clients on the LAN that must make DNS requests
(such as those required for Web browsing and email). From the viewpoint of
the clients on the LAN, the BSGX4e appears to be the server. From the
viewpoint of the server on the WAN, the BSGX4e appears to be the client.
The BSGX4e maintains a cache filled with the successful DNS exchanges. If
a DNS request is already in the cache, the BSGX4e can reply to the DNS
request without referencing a DNS server
The following table displays DNS relay provisioning.
Use this command to configure DNS relay.
Syntax config relay dns settings enabled [yes|no] dns1 <ip address>
dns2 <ip address> source [user|auto]
Parameters enabled yes|no Enable/disable DNS relay. The default is no
(disabled).
dns1 ip address Enter the IP address of the primary external
DNS server.
dns2 ip address Enter the IP address of an optional second
external DNS server.
Table 1
Possible sources for the DNS relay configuration
DNS Relay
source
parameter
DNS Client source
parameter
Does DHCP or
PPP client
provide DNS
configuration?
Does user
provide
DNS Client
configuration
?
Source of DNS relay
configuration
user any User-provided for DNS
Relay
auto dhcp or ppp yes DHCP or PPP
auto dhcp or ppp no User-provided for DNS
Relay
auto user yes User-provided for DNS
Client
auto user no User-provided for DNS
Relay
auto auto yes DHCP or PPP
auto auto no yes User-provided for DNS Cli-
ent
auto auto no no User-provided for DNS
Relay