samba - Feb 2016 - FSMO DC giving curious log output

Hello!

I’m seeing the following log entries in /var/log/syslog on my FSMO (Ubuntu
14.04.3 LTS / Samba 4.3.4):

Feb 19 09:56:48 dc00 samba[4552]: [2016/02/19 09:56:48.527183,  0]
../source4/dns_server/dns_update.c:426(handle_one_update)
Feb 19 09:56:48 dc00 samba[4552]:   Can't handle updates of type 255 yet
Feb 19 09:56:48 dc00 samba[4552]: [2016/02/19 09:56:48.860255,  0]
../source4/dns_server/dns_update.c:426(handle_one_update)
Feb 19 09:56:48 dc00 samba[4552]:   Can't handle updates of type 255 yet
Feb 19 09:57:03 dc00 samba[4552]: [2016/02/19 09:57:03.046226,  0]
../source4/dns_server/dns_update.c:426(handle_one_update)
Feb 19 09:57:03 dc00 samba[4552]:   Can't handle updates of type 255 yet
Feb 19 09:57:03 dc00 samba[4552]: [2016/02/19 09:57:03.641753,  0]
../source4/dns_server/dns_update.c:426(handle_one_update)
Feb 19 09:57:03 dc00 samba[4552]:   Can't handle updates of type 255 yet
Feb 19 11:30:04 dc00 samba[4552]: [2016/02/19 11:30:04.050614,  0]
../source4/dns_server/dns_update.c:426(handle_one_update)
Feb 19 11:30:04 dc00 samba[4552]:   Can't handle updates of type 255 yet

I looked up type 255 in the context of DNS and found some information about it
being a request for all DNS records. Has anyone seen this before? Could this be
a normal message? Or is there something on my network requesting all DNS records
from my FSMO DC?

DNS is Samba Internal, not BIND-DLZ.

Thank you in advance!
Matthew

©2016 KNOCK, inc.  All rights reserved. KNOCK is a registered trademark of
KNOCK, inc. This message and any attachments contain information, which is
confidential and/or privileged.  If you are not the intended recipient, please
refrain from any disclosure, copying, distribution or use of this information.
 Please be aware that such actions are prohibited.  If you have received this
transmission in error, kindly notify the sender by e-mail.  Your cooperation is
appreciated.

Hello Matthew,


Am 19.02.2016 um 18:46 schrieb Matthew Delfino:
> Feb 19 09:56:48 dc00 samba[4552]: [2016/02/19 09:56:48.527183,  0]
../source4/dns_server/dns_update.c:426(handle_one_update)
> Feb 19 09:56:48 dc00 samba[4552]:   Can't handle updates of type 255
yet
> 
> DNS is Samba Internal, not BIND-DLZ.
The internal DNS doesn't support all types of DSN records at the moment.

source4/dns_server/dns_update.c:

        switch (update->rr_type) {
        case DNS_QTYPE_A:
        case DNS_QTYPE_NS:
        case DNS_QTYPE_CNAME:
        case DNS_QTYPE_SOA:
        case DNS_QTYPE_PTR:
        case DNS_QTYPE_MX:
        case DNS_QTYPE_AAAA:
        case DNS_QTYPE_SRV:
        case DNS_QTYPE_TXT:
                break;
        default:
                DEBUG(0, ("Can't handle updates of type %u yet\n",
                          update->rr_type));
                return DNS_ERR(NOT_IMPLEMENTED);
        }


Any idea what application requests that type? Maybe you can capture the
traffic with tcpdump, to get a clue.


Regards,
Marc

Am 21.02.2016 um 19:32 schrieb Miguel Medalha:
> I didn't change the source in any way. tar xf to the /root directory
> is all I did. I did "make clean" a number of times. The catalog
file
> is in the expected place.
/root/bin/default/docs-xml/build/catalog.xml
in your case.



> The documentation build always fails with "failed to load external
> entity "http://www.samba.org/samba/DTD/samba-doc" and other
messages
> with similar content. It complains about being unable to reach
> external resources and having no fallback.The machine has normal ,
> functioning access to the Internet.
>
> I just tried the same on a CentOS 6.7 machine and stumbled upon the
> exact same obstacle. I have no problem whatsoever with building and
> installing Samba. Only the documentation fails.

Can you check if you're having the following 3 packages installed?

$ rpm -aq | egrep "xml-common|libxslt|docbook-style-xsl"
libxslt-1.1.28-5.el7.x86_64
docbook-style-xsl-1.78.1-3.el7.noarch
xml-common-0.6.3-39.el7.noarch


Regards,
Marc