Name Service Caching

When the connection has been torn down, you may find that the PPP link is often reactivated. The reason for this is that the name service cache daemon, /usr/sbin/nscd, will cache the hosts file and force the connection up to rebuild its data at certain intervals. We only really want the connection to be opened at our request, so we'll disable hosts caching. We do this by altering the hosts entry, then restarting the daemon. The file is shown below after modification, along with the tasks required to restart it:

cesium# grep enable-cache /etc/nscd.conf
       enable-cache            hosts           no
cesium# /etc/init.d/nscd stop
cesium# /etc/init.d/nscd start
cesium#

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