Why install a DNSCurve forwarder?
Do you run a DNS server that sends out DNS data?
For example, do you run
an "authoritative DNS server" such as tinydns
or PowerDNS Server or BIND or NSD or MaraDNS or Nominum ANS
to publish the IP addresses of your web server and mail server?
This page explains the benefits of
adding DNSCurve protection
to your outgoing DNS data.
What does DNSCurve do for me?
An increasing number of DNS clients around the Internet support DNSCurve.
install a DNSCurve forwarder in front of your server
then the incoming DNS queries from those clients,
and the DNS responses sent back to those clients from your server,
will be automatically encrypted
with high-speed high-security cryptography.
This has several benefits:
- An attacker who sees your incoming DNS queries won't be able to understand them.
He can still gain information from "traffic analysis" (seeing when you're receiving packets
and how long the packets are) but will not be shown the packet contents.
- An attacker who sees the outgoing DNS responses won't be able to understand them.
- An attacker who forges an outgoing DNS response won't be able to fool DNSCurve clients.
Those clients will simply discard the forgery
and wait for the correct response to get through.
This is version 2009.06.22 of the out-benefits.html web page.