[SOLVED] DHCP server to handle hostname.

durwin at mgtsciences.com durwin at mgtsciences.com
Fri Sep 23 20:25:51 UTC 2016


"dhcp-users" <dhcp-users-bounces at lists.isc.org> wrote on 09/23/2016 
02:20:33 PM:

> From: Bill Shirley <Bill at Henagar.PolymerIndustries.biz>
> To: dhcp-users at lists.isc.org
> Date: 09/23/2016 02:20 PM
> Subject: Re: [SOLVED] DHCP server to handle hostname.
> Sent by: "dhcp-users" <dhcp-users-bounces at lists.isc.org>
> 
> http://www.zytrax.com/books/dns/ch7/hkpng.html#check-names
> In named.conf using:
>         check-names             master ignore;
>         check-names             slave ignore;
> allows the underscore.
> 
> Bill

Thank you  :)  This I'm going to add to my knowledge base.
Along with Simon's information.

Durwin

> On 9/22/2016 4:26 PM, durwin at mgtsciences.com wrote:
> 
> Durwin F. De La Rue
> Management Sciences, Inc.
> 6022 Constitution Ave. NE
> Albuquerque, NM  87110
> Phone (505) 255-8611 
> 
> "dhcp-users" <dhcp-users-bounces at lists.isc.org> wrote on 09/22/2016 
> 12:22:55 PM:
> 
> > From: Rick Dicaire <kritek at gmail.com> 
> > To: Users of ISC DHCP <dhcp-users at lists.isc.org> 
> > Date: 09/22/2016 12:24 PM 
> > Subject: Re: DHCP server to handle hostname. 
> > Sent by: "dhcp-users" <dhcp-users-bounces at lists.isc.org> 
> > 
> > Here's something I use when hosts don't send a hostname. 
> > In global options: 
> > 
> > ddns-hostname = pick (option fqdn.hostname, option host-name, concat
> > ("ddns-", binary-to-ascii (10, 8, "-", leased-address))); 
> > option host-name = config-option server.ddns-hostname; 
> > 
> > Resulting ddns hostname is ddns-xxx-xxx-xxx-xxx.domain_name 
> 
> I'm going to have to remember this method. 
> 
> After digging deeper into the logs, I found named was complaining 
> about the underscore in the name.  The two lines *do* work, if you 
> remove the underscore in hostname. 
> 
> option host-name "e2rb_004"; 
> ddns-hostname "e2rb_004"; 
> 
> Change to. 
> 
> option host-name "e2rb004"; 
> ddns-hostname "e2rb004"; 
> 
> 
> Thank you. 
> 
> > 
> > Edit to suit. 
> > 
> > On Thu, Sep 22, 2016 at 1:48 PM, <durwin at mgtsciences.com> wrote: 
> > I have some embedded devices with minimal OS.  I am not sure the 
> > DHCP client has compiled ability to send hostname.  I have seen this
> > used while searching for help on this subject. 
> > 
> > host e2rb_004 { 
> >         option host-name "e2rb_004"; 
> >         ddns-hostname "e2rb_004"; 
> >         hardware ethernet 00:10:60:31:b2:a0; 
> >         fixed-address 172.23.93.38; 
> > } 
> > 
> > 
> > This does not add the hostname in DNS.  My configuration does work 
> > as a normal DDNS.  Any machine which sends it's hostname when 
> > requesting an IP *does* get added into DNS records.  What I would 
> > like to do is to handle those embedded devices which do *not* 
sendhostname. 
> > 
> > Here is the DHCPD options. 
> > 
> > 
> > === dhcpd.conf === 
> > authoritative; 
> > 
> > ddns-update-style interim; 
> > ddns-updates on; 
> > ddns-domainname "mydomain.com"; 
> > ddns-rev-domainname "in-addr.arpa."; 
> > update-static-leases on; 
> > ignore client-updates; 
> > one-lease-per-client true; 
> > 
> > # WPAD definition 
> > option wpad code 252 = text; 
> > 
> > key MSI_DHCPD_UPDATER { 
> >     algorithm hmac-md5; 
> >     secret "mysecret"; 
> > }; 
> > 
> > zone mydomain.com. { 
> >     primary 127.0.0.1; 
> >     key MSI_DHCPD_UPDATER; 
> > } 
> > 
> > zone 93.23.172.in-addr.arpa. { 
> >     primary 127.0.0.1; 
> >     key MSI_DHCPD_UPDATER; 
> > } 
> > 
> > subnet 172.23.93.0 netmask 255.255.255.0 { 
> >     option routers          172.23.93.1; 
> >     option wpad "\n\000"; 
> >     option subnet-mask      255.255.255.0; 
> >     option domain-name      "mydomain.com"; 
> >     option domain-name-servers  172.23.93.3,172.23.93.9,198.59.115.2; 
> >     option time-offset      -25200; # Mountain Standard Time 
> >     range dynamic-bootp 172.23.93.95 172.23.93.249; 
> >     default-lease-time 57600; 
> >     max-lease-time 57600; 
> >     min-lease-time 57600; 
> >     ddns-domainname "mydomain.com"; 
> > } 
> > 
> > 
> > Any advice is appreciated.  Thank you. 
> > 
> > 
> > 
> > Durwin F. De La Rue
> > Management Sciences, Inc.
> > 6022 Constitution Ave. NE
> > Albuquerque, NM  87110
> > Phone (505) 255-8611
> > 
> > 
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> 
> > 
> > -- 
> > aRDy Music and Rick Dicaire present:
> > http://www.ardynet.com
> > http://www.ardynet.com:9000/ardymusic.ogg.m3u
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