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README: document "logging" and add caching suggestion

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1 parent 250abe1 commit eed9797ca130f7183189dc8e110a331fc9bbdb41 @edmonds committed Sep 25, 2011
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@@ -43,6 +43,13 @@ currently supported options are:
This option is disabled by default.
+ logging
+
+ If "logging" is set, resolutions will be logged to syslog containing
+ the DNS name, DNS rrtype, resolution latency, and secure/bogus flags.
+
+ This option is disabled by default.
+
Trust anchors are configured by creating files in the /etc/ubdns/keys
directory. Only files ending in ".key" will be processed. If the unbound
server is in use, any files that are in use as auto-trust-anchor-files can be
@@ -52,6 +59,10 @@ To configure the Name Service Switch to use nss-ubdns instead of the glibc dns
plugin, edit the /etc/nsswitch.conf file and change "dns" to "ubdns" for the
hosts database (the line beginning with "hosts:").
+Note that installing nss-ubdns will cause your host to generate additional DNS
+queries. You may want to install a local DNS cache to reduce the upstream
+impact of this additional load.
+
TESTING
=======

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