Setup guide

Summary
DNS cache is used to minimize DNS requests to an external DNS server as well as to minimize
DNS resolution time. This is a simple recursive DNS server with local items.
Specifications
Packages required: system
License required: level1
ip dns
Standards and Technologies: DNS
Hardware usage: Not significant
Related Documents
• Package Management
• HotSpot Gateway
• AAA
Description
The Wandy router with DNS cache feature enabled can be set as a primary DNS server for any
DNS-compliant clients. Moreover, Wandy router can be specified as a primary DNS server under
its dhcp-server settings. When the DNS cache is enabled, the Wandy router responds to DNS
TCP and UDP requests on port 53.
Additional Documents
• http://www.freesoft.org/CIE/Course/Section2/3.htm
• http://www.networksorcery.com/enp/protocol/dns.htm
• RFC1035
Client Configuration and Cache Setup
ip dns
Description
DNS client is used to provide domain name resolution for router itself as well as for the P2P clients
connected to the router.
Property Description
allow-remote-requests (yes | no) - specifies whether to allow network requests
primary-dns (IP address; default: 0.0.0.0) - primary DNS server
secondary-dns (IP address; default: 0.0.0.0) - secondary DNS server
cache-size (integer: 512..10240; default: 2048 kB) - specifies the size of DNS cache in kB
cache-max-ttl (time; default: 7d) - specifies maximum time-to-live for cahce records. In other
words, cache records will expire after cache-max-ttl time.
cache-used (read-only: integer) - displays the currently used cache size in kB