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Special Forums IP Networking New DNS Server on FreeBSD 7.0 Post 302189554 by era on Saturday 26th of April 2008 12:18:39 PM
Old 04-26-2008
One obvious choke point is the firewall. Does the system have a firewall of its own? Do you get log messages somewhere useful (I'd be looking at /var/log/messages but FreeBSD might be different than Linux in that regard) when attempting to connect from an outside IP?
 

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DNS-FLOOD-DETECTOR(8)					     dns flood detection tool					     DNS-FLOOD-DETECTOR(8)

NAME
DNS-FLOOD-DETECTOR - dns flood detection and alert tool SYNOPSIS
dns-flood-detector [-b|-d] [-v] [-h] [-i device] [-t n] [-a n] [-w n] [-x n] [-m n] DESCRIPTION
DNS Flood Detector was developed to detect abusive usage levels on high traffic nameservers and to enable quick response to the use of one's nameserver to facilitate spam. OPTIONS
-b run in foreground in bindsnap mode -d run in background in daemon mode -v verbose output - use again for more verbosity -h display help -i device specify device name to listen on -t n alarm at >n queries per second -a n reset alarm after n seconds -w n calculate stats every n seconds -x n create n buckets -m n report overall stats every n seconds SEE ALSO
Website <http://www.adotout.com/> AUTHOR
DNS-FLOOD-DETECTOR was written by Dennis Opacki <dopacki@adotout.com>. This manual page was written by Jan Wagner <waja@cyconet.org>, for the Debian project (but may be used by others). 1.10 2006-11-03 DNS-FLOOD-DETECTOR(8)
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