dhcpd creating corrupt DNS entries via DDNS

Denis Laventure Denis_Laventure at uqac.ca
Thu May 30 20:41:02 UTC 2013


I do this to control invalid character on my dhcpd.conf (dhcpd version > 4 for ~~):

if not (option host-name ~~ "^[-_0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ]+$") {
  log (info, "DEBUG: DDNS name invalid! Not added to DDNS.");
  ddns-updates off;
}

Denis Laventure

-----Message d'origine-----
De : dhcp-users-bounces+denis_laventure=uqac.ca at lists.isc.org [mailto:dhcp-users-bounces+denis_laventure=uqac.ca at lists.isc.org] De la part de Neff, Glen
Envoyé : 30 mai 2013 16:12
À : Users of ISC DHCP
Objet : RE: dhcpd creating corrupt DNS entries via DDNS

> > Anyone on the list have any ideas on how to prevent dhcpd from accepting invalid hostnames and/or passing them along to bind?  Or preventing bind from accepting them?

> Why do you care?   As soon as they fix the bug in their client script, the problem will go away.

~20,000 developers & testers on four continents. . . it or something similar will happen again.

-G

/*
 * Glen R. J. Neff
 * USD Lab Operations Infrastructure Team
 * glen.neff at emc.com
 *
 * EMC^2 == E^2
 */
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