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Old 21st February 2010
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Default DDNS problem (unable to add forward / reverse map)

Hi all,

I got tired of updating hosts files and decided to set up dynamic DNS for hosts on my local LAN. The server is running FreeBSD 8.0-RELEASE-p2. Hosts are Windows and Linux. However things have not gone as smoothly as I hoped.

The messages in the logs look like this:

Code:
Feb 21 18:15:21 moose dhcpd: Unable to add forward map from dashaus-nas.dashaus to 192.168.1.10: timed out
Feb 21 18:18:05 moose dhcpd: unable to add reverse map from 12.1.168.192.in-addr-arpa to beast.dashaus: timed out
Feb 21 18:20:22 moose dhcpd: Unable to add forward map from dashaus-nas.dashaus to 192.168.1.10: timed out
Feb 21 18:23:06 moose dhcpd: unable to add reverse map from 12.1.168.192.in-addr-arpa to beast.dashaus: timed out
Feb 21 18:25:23 moose dhcpd: Unable to add forward map from dashaus-nas.dashaus to 192.168.1.10: timed out
named.conf file:

Code:
options {
        // Relative to the chroot directory, if any
        directory       "/etc/namedb";
        pid-file        "/var/run/named/pid";
        dump-file       "/var/dump/named_dump.db";
        statistics-file "/var/stats/named.stats";

// If you've got a DNS server around at your upstream provider, enter
// its IP address here, and enable the line below.  This will make you
// benefit from its cache, thus reduce overall DNS traffic in the Internet.
        forwarders {
                62.101.93.101;
        };
};

acl dashaus{
        192.168.1.0/24;
        127.0.0.1;
};

zone "." {
        type slave;
        file "slave/root.slave";
        masters {
                192.5.5.241;    // F.ROOT-SERVERS.NET.
        };
        notify no;
};
zone "arpa" {
        type slave;
        file "slave/arpa.slave";
        masters {
                192.5.5.241;    // F.ROOT-SERVERS.NET.
        };
        notify no;
};
zone "in-addr.arpa" {
        type slave;
        file "slave/in-addr.arpa.slave";
        masters {
                192.5.5.241;    // F.ROOT-SERVERS.NET.
        };
        notify no;
};

// RFC 1912
zone "localhost"        { type master; file "master/localhost-forward.db"; };
zone "127.in-addr.arpa" { type master; file "master/localhost-reverse.db"; };
zone "255.in-addr.arpa" { type master; file "master/empty.db"; };

zone "dashaus" {
    type master;
    file "dashaus";
    allow-update {
        dashaus;
    };
};

zone "1.168.192.in-addr.arpa" {
    type master;
    file "dashaus.rev";
    allow-update {
        dashaus;
    };
};
dhcpd.conf:

Code:
option domain-name "dashaus";
option domain-name-servers 192.169.1.1, 208.67.222.222, 208.67.220.220;
option subnet-mask 255.255.255.0;

default-lease-time 600;
max-lease-time 7200;

#authoritative;
ddns-update-style interim;
ddns-domainname "dashaus";
ddns-rev-domainname "in-addr-arpa";
log-facility local7;
update-static-leases on;
do-forward-updates true;

subnet 192.168.1.0 netmask 255.255.255.0 {
  range 192.168.1.10 192.168.1.30;
  option routers 192.168.1.1;
  option domain-name-servers 192.168.1.1;
}

subnet 192.168.3.0 netmask 255.255.255.0 {
  range 192.168.3.10 192.168.3.20;
  option routers 192.168.1.1;
  option domain-name-servers 192.168.1.1;
}
And finally the zone files. Forward:

Code:
;BIND DUMP V8
$ORIGIN .
dashaus.        3600    IN      NS      moose.dashaus.
                3600    IN      SOA     moose.dashaus. root.moose.dashaus. (
                                        20011195        ; serial number
                                        3600            ; refresh
                                        900             ; retry
                                        3600000         ; expiry
                                        3600            ; minimum
                                        )
$ORIGIN dashaus.
moose   3600            A       192.168.1.1
And reverse:

Code:
;BIND DUMP V8
$ORIGIN 1.168.192.in-addr.arpa.
@       3600    IN      NS      moose.dashaus.
@       3600    IN      SOA     moose.dashaus. root.moose.dashaus. (
                                20011195        ; serial number
                                3600            ; refresh
                                900             ; retry
                                3600000         ; expiry
                                3600            ; minimum
                                )
I have been reading manuals, cook-books and forum posts all over the place, and the one thing I can think of that could be significant is that the FreeBSD box is itself a DHCP client. It acts as the firewall and gateway, so it has one NIC which acts as a DHCP client to my ISP, and another NIC which is where the DHCP server runs.

The reason I wonder whether this might be significant is that the FreeBSD box itself reports itself as being in the ISP's domain. The resolv.conf file also gets rewritted by dhclient, so "nslookup <servername>" fails, though "nslookup <servername> <servername>" works.

Can anybody tell me what (obvious, foolish) mistake I have made above?
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