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Full Discussion: DNS traffic
Special Forums Cybersecurity DNS traffic Post 302756977 by jim mcnamara on Thursday 17th of January 2013 12:06:10 AM
Old 01-17-2013
This might help you - nscd(8): name service cache daemon - Linux man page

You should have the nscd daemon running. It kind of looks like this is not the case.
It caches DNS information. Which would reduce your outbound dns requests.

Next: should you be on a separate subnet behind a router? Sounds like that might be part of the issue. I don't get why foreign dns requests appear to be going through your box.
 

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nscd(1M)						  System Administration Commands						  nscd(1M)

NAME
nscd - name service cache daemon SYNOPSIS
/usr/sbin/nscd [-f configuration-file] [-g] [-e cachename, yes | no] [-i cachename] DESCRIPTION
nscd is a process that provides a cache for the most common name service requests. The default configuration-file /etc/nscd.conf determines the behavior of the cache daemon. See nscd.conf(4). nscd provides caching for the passwd(4), group(4), hosts(4), ipnodes(4), exec_attr(4), prof_attr(4), and user_attr(4) databases through standard libc interfaces, such as gethostbyname(3NSL), getipnodebyname(3SOCKET), gethostbyaddr(3NSL), and others. Each cache has a separate time-to-live for its data; modifying the local database (/etc/hosts, /etc/resolv.conf, and so forth) causes that cache to become invali- dated upon the next call to nscd. The shadow file is specifically not cached. getspnam(3C) calls remain uncached as a result. nscd also acts as its own administration tool. If an instance of nscd is already running, commands are passed to the running version trans- parently. In order to preserve NIS+ security, the nscd service checks the permissions on the passwd table if NIS+ is being used. If this table cannot be read by unauthenticated users, then nscd will make sure that any encrypted password information returned from the NIS+ server is sup- plied only to the owner of that password. OPTIONS
Several of the options described below require a cachename specification. Supported values are passwd, group, hosts, ipnodes, exec_attr, prof_attr, and user_attr. -f configuration-file Causes nscd to read its configuration data from the specified file. -g Prints current configuration and statistics to standard output. This is the only option executable by non-root users. -e cachename, yes|no Enables or disables the specified cache. -i cachename Invalidate the specified cache. EXAMPLES
Example 1: Stopping and restarting the nscd daemon. example# svcadm disable system/name-service-cache example# svcadm enable system/name-service-cache FILES
/etc/nscd.conf Determines athe behavior of the cache daemon ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
svcs(1), svcadm(1M), getspnam(3C), gethostbyname(3NSL), getipnodebyname(3SOCKET), exec_attr(4), group(4), hosts(4), ipnodes(4), nscd.conf(4), nsswitch.conf(4), passwd(4), prof_attr(4), user_attr(4), attributes(5), NOTES
The output from the -g option to nscd is subject to change. Do not rely upon it as a programming interface. The nscd service is managed by the service management facility, smf(5), under the service identifier: svc:/system/name-service-cache Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser- vice's status can be queried using the svcs(1) command. SunOS 5.10 30 Oct 2003 nscd(1M)
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