Re: Updating DNS after DHCP
John [EMAIL PROTECTED] writes: Thanks, but I'm still missing a piece for my ideal scenario. This requires the DCP server to know to whom it is handing out the address, doesn't it? How would it know that? Does the DHCP request include the host name? Or do you have to somehow bind a NIC/MAC address to a name for isc-dhcp? The DHCP request usually contains a client identifier, which you can configure dhcpd to use as the host name. You can also use the MAC address to identify machines (and associate a name) if you want. Clearly, the BIND configuration is already set up to accept updates, since the Windows system is successful in doing so. I think that client update can be enabled with a dhclient.conf parameter, described in the manual for dhclient.conf(5) under DYNAMIC DNS, but I prefer to do it from my DHCP server instead... -- Lowell Gilbert, embedded/networking software engineer, Boston area: resume/CV at http://be-well.ilk.org:8088/~lowell/resume/ username/password public ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Updating DNS after DHCP
Gilad Rom [EMAIL PROTECTED] writes:
and make sure BIND is willing to take it:
(from /etc/named/named.conf:
zone lan {
type master;
allow-update { 192.168.1.10; }; --
file s/lan;
};
(192.168.1.10 is my DHCP server, which is actually
the same machine which runs BIND)
after a little while, 'host -l lan' says:
OREN1.lan has address 192.168.1.54
ROIE.lan has address 192.168.1.57
Sun.lan has address 192.168.1.56
zhacy.lan has address 192.168.1.58
And so forth...
These are all dynamically-assigned addresses,
I only have ladon/mail/router.lan defined in the
zone file.
If you define the reverse zone, you can get reverse mappings too...
--
Lowell Gilbert, embedded/networking software engineer, Boston area:
resume/CV at http://be-well.ilk.org:8088/~lowell/resume/
username/password public
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Re: Updating DNS after DHCP
Scott Mitchell wrote:
On Tue, Jan 13, 2004 at 01:16:23PM +0100, Ruben de Groot wrote:
On Mon, Jan 12, 2004 at 11:09:38PM -0600, John typed:
I see that some Microsoft systems send out an update to DNS with
the system name. I configured my DNS server to accept these updates,
but now that I'm running FreeBSD on a laptop - how do I do that
from FreeBSD? I've looked at the dhclient man pages and the named
man pages and the pages that they refer to and I didn't pick up
any hints there.
Can anyone give me a clue? (Yeah - I'm clueless...)
I believe this is done by the nsupdate(8) program.
You can also have your DHCP server do the updates - which makes sense, as
it's the thing handing out the addresses to your client machines. I have
this working reasonably well with isc-dhcpd, for Windows and FreeBSD
clients.
You want to read the 'DYNAMIC DNS UPDATES' section of the dhcpd.conf(5)
manpage, and whatever docs your DNS server has on this topic. There are
plenty of examples of working configs for isc-dhcpd and bind to be found on
the web.
HTH,
Scott
I just set this up today...
There's actually nothing to be done on the client side.
The isc-dhcp server takes care of informing BIND that it has handed
out a new Address.
You have to add the following line to your dhcpd.conf:
ddns-update-style ad-hoc;
and make sure BIND is willing to take it:
(from /etc/named/named.conf:
zone lan {
type master;
allow-update { 192.168.1.10; }; --
file s/lan;
};
(192.168.1.10 is my DHCP server, which is actually
the same machine which runs BIND)
after a little while, 'host -l lan' says:
OREN1.lan has address 192.168.1.54
ROIE.lan has address 192.168.1.57
Sun.lan has address 192.168.1.56
zhacy.lan has address 192.168.1.58
And so forth...
These are all dynamically-assigned addresses,
I only have ladon/mail/router.lan defined in the
zone file.
Gilad.
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Re: Updating DNS after DHCP
On Thu, Jan 15, 2004 at 03:30:08PM +0200, Gilad Rom wrote:
Scott Mitchell wrote:
On Tue, Jan 13, 2004 at 01:16:23PM +0100, Ruben de Groot wrote:
On Mon, Jan 12, 2004 at 11:09:38PM -0600, John typed:
I see that some Microsoft systems send out an update to DNS with
the system name. I configured my DNS server to accept these updates,
but now that I'm running FreeBSD on a laptop - how do I do that
from FreeBSD? I've looked at the dhclient man pages and the named
man pages and the pages that they refer to and I didn't pick up
any hints there.
Can anyone give me a clue? (Yeah - I'm clueless...)
I believe this is done by the nsupdate(8) program.
You can also have your DHCP server do the updates - which makes sense, as
it's the thing handing out the addresses to your client machines. I have
this working reasonably well with isc-dhcpd, for Windows and FreeBSD
clients.
You want to read the 'DYNAMIC DNS UPDATES' section of the dhcpd.conf(5)
manpage, and whatever docs your DNS server has on this topic. There are
plenty of examples of working configs for isc-dhcpd and bind to be found on
the web.
HTH,
Scott
I just set this up today...
There's actually nothing to be done on the client side.
The isc-dhcp server takes care of informing BIND that it has handed
out a new Address.
You have to add the following line to your dhcpd.conf:
ddns-update-style ad-hoc;
and make sure BIND is willing to take it:
(from /etc/named/named.conf:
zone lan {
type master;
allow-update { 192.168.1.10; }; --
file s/lan;
};
(192.168.1.10 is my DHCP server, which is actually
the same machine which runs BIND)
after a little while, 'host -l lan' says:
OREN1.lan has address 192.168.1.54
ROIE.lan has address 192.168.1.57
Sun.lan has address 192.168.1.56
zhacy.lan has address 192.168.1.58
And so forth...
These are all dynamically-assigned addresses,
I only have ladon/mail/router.lan defined in the
zone file.
Thanks, but I'm still missing a piece for my ideal scenario. This
requires the DCP server to know to whom it is handing out the
address, doesn't it? How would it know that? Does the DHCP request
include the host name? Or do you have to somehow bind a NIC/MAC
address to a name for isc-dhcp?
Clearly, the BIND configuration is already set up to accept updates,
since the Windows system is successful in doing so.
The Windows dhcp client and the FreeBSD dhcp client are behaving
differently with the same dhcp server configuration (in fact,
time-sharing a WiFi card) - the Windows host can do it, the FreeBSD
system doesn't. That's why I was looking for a client-side solution.
Consider further the fact that I am sharing a WiFi card between
them, so the host using that NIC address changes. Depending on my
needs, either of the hosts may be either connected wired or wireless.
They each have their own wired port with it's own NIC, and the
WiFi card bounces between them as needed.
I will look at the isc-dhcp thing and see if it can somehow know
which host it is setting up, and that may be satisfactory, but it
won't be the same mechanism that the Windows system is using. It
doesn't HAVE to be, but I wanted to make sure people are aware
that there is, apparently, something different going on with the
Windows system than what we can/will/want to do with FreeBSD.
--
John Lind
[EMAIL PROTECTED]
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Re: Updating DNS after DHCP
On Tue, Jan 13, 2004 at 01:16:23PM +0100, Ruben de Groot wrote: On Mon, Jan 12, 2004 at 11:09:38PM -0600, John typed: I see that some Microsoft systems send out an update to DNS with the system name. I configured my DNS server to accept these updates, but now that I'm running FreeBSD on a laptop - how do I do that from FreeBSD? I've looked at the dhclient man pages and the named man pages and the pages that they refer to and I didn't pick up any hints there. Can anyone give me a clue? (Yeah - I'm clueless...) I believe this is done by the nsupdate(8) program. You can also have your DHCP server do the updates - which makes sense, as it's the thing handing out the addresses to your client machines. I have this working reasonably well with isc-dhcpd, for Windows and FreeBSD clients. You want to read the 'DYNAMIC DNS UPDATES' section of the dhcpd.conf(5) manpage, and whatever docs your DNS server has on this topic. There are plenty of examples of working configs for isc-dhcpd and bind to be found on the web. HTH, Scott -- === Scott Mitchell | PGP Key ID | Eagles may soar, but weasels Cambridge, England | 0x54B171B9 | don't get sucked into jet engines scott at fishballoon.org | 0xAA775B8B | -- Anon ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Updating DNS after DHCP
On Mon, Jan 12, 2004 at 11:09:38PM -0600, John typed: I see that some Microsoft systems send out an update to DNS with the system name. I configured my DNS server to accept these updates, but now that I'm running FreeBSD on a laptop - how do I do that from FreeBSD? I've looked at the dhclient man pages and the named man pages and the pages that they refer to and I didn't pick up any hints there. Can anyone give me a clue? (Yeah - I'm clueless...) I believe this is done by the nsupdate(8) program. Ruben Thanks! -- John Lind [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Updating DNS after DHCP
I see that some Microsoft systems send out an update to DNS with the system name. I configured my DNS server to accept these updates, but now that I'm running FreeBSD on a laptop - how do I do that from FreeBSD? I've looked at the dhclient man pages and the named man pages and the pages that they refer to and I didn't pick up any hints there. Can anyone give me a clue? (Yeah - I'm clueless...) Thanks! -- John Lind [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
