Router Installation and Configuration Manual/Configuring DNS Proxy

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Introduction

This chapter describes how to configure the ImageStream router to act as a DNS Proxy for clients by using Inetics' ip dns-server command in the main WAN interface configuration file.
This chapter covers the following topics:
  • Router as a DNS Proxy
DNS Proxy was introduced in version 4.4.1.
Before configuring DNS Proxy services, you must first configure your upstream DNS servers. When the router is using DHCP for its upstream connection, the upstream DNS servers are automatically configured. When using static IP addressing for the router's upstream connection set the DNS servers via main menu option 1 (Configuration menu) then option 2 (Global configuration) then option 2 (Change DNS server).
Next add the global command ip dns-server to your main Network interface configuration file (wan.conf)
Finally verify the dnsmasq program is running by checking the router debug log (syslog) from the main menu option 2 (status menu) then option 1 (Router Status Menu) then option 1 (Router event log (syslog)). There should be a message similar to:
May 15 20:20:31 ISis-Router dnsmasq[3129]: started, version 2.61 cachesize 150
May 15 20:20:31 ISis-Router dnsmasq[3129]: compile time options: IPv6 GNU-getopt no-DBus no-i18n no-IDN DHCP DHCPv6 no-Lua TFTP no-conntrack
May 15 20:20:31 ISis-Router dnsmasq[3129]: reading /etc/resolv.conf
May 15 20:20:31 ISis-Router dnsmasq[3129]: using nameserver 192.168.100.1#53
May 15 20:20:31 ISis-Router dnsmasq[3129]: using nameserver 205.159.243.5#53
May 15 20:20:31 ISis-Router dnsmasq[3129]: read /etc/hosts - 1 addresses
Now configure your DHCP server service or Virtual Template for PPPoE/L2TP to use your router's IP as the DNS server.
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