> But perhaps it would be simpler to provide users a way to disable this
functionality manually? Is there any kind of runtime configuration
available?
At runtime, it doesn't seem to have a way, for instance, I already tried
the following without success: do-forward-updates false;
# man dhclient.conf
If you want to do DNS updates in the DHCP client script (see
dhclient-script(8)) rather than having the DHCP client do the update directly
(for example, if you want to use SIG(0) authentication, which is not supported
directly by the DHCP client, you can
instruct the client not to do the update using the do-forward-updates
statement. Flag should be true if you want the DHCP client to do the update,
and false if you don't want the DHCP client to do the update. By default, the
DHCP client will do the DNS
update.
To disable the functionality at the moment for Trusty, manipulation in
the source package is required.
Undefine NSUPDATE in includes/site.h :
-#define NSUPDATE
+/* #define NSUPDATE */
and disabled failover and tracing in debian/rules :
./configure \
--prefix=/usr \
--sysconfdir=/etc/dhcp \
+ --disable-tracing \
+ --disable-failover \
Eric
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https://bugs.launchpad.net/bugs/1176046
Title:
isc-dhcp dhclient listens on extra random ports
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