problem updating dynamic dns from isc dhcpd
Cuttler, Brian (HEALTH)
brian.cuttler at health.ny.gov
Wed Feb 4 18:53:26 UTC 2015
Hello dhcpd users,
I'm sorry to have to ask, I've found some very helpful web pages, but I've been unable to get the syntax quite right...
I am running a test system to prototype how we want to do our dhcp moving forward.
To that end I've built a test system on Centos 7, installed isc dhcp and named, both current versions.
DHCP is currently able to hand out addresses in the designated zone, and I am able to update DNS using # nsupdate.
When DHCP attempts to update the DNS tables I get the following error.
Dhcpd: unable to add forward map from host.esp22.wadsworth.org to 10.57.36.36 not found
The zones in the named.conf look like this
zone "esp22.wadsworth.org" in {
type master;
file "db.esp22";
allow-update { key dhcpupdate; };
};
zone 36.57.10.in-addr.arpa in {
type master;
file "db.esp22-ptr";
allow-update { key dhcpupdate; };
};
The stanza I'm working with in dhcpd.conf is probably where the problem is, I suspect I do not actually understand the structure of the dhcpd.conf file
I know that putting the ddns-domainname in the stanza is an error, its global, but the domain is "wadsworth.org" and I'd thought that the dynamic range needed to be limited to a subset of the domain.
Not sure how to resolve the issue and need a little help.
I can include more detail, and will post the results when completed, any help would be appreciated.
#### default_vlan at ESP, Vlan 22
subnet 10.57.36.0 netmask 255.255.252.0 {
option routers 10.57.36.1;
pool {
ddns-hostname = option host-name;
ddns-domainname = "esp22.wadsworth.org";
allow unknown clients;
deny dynamic bootp clients;
range 10.57.36.10 10.57.39.254;
option domain-name-servers admin.wadsworth.org, bionsc.wadsworth.org, ld
ap1.wadsworth.org;
}
}
Thanks in advance,
Brian
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