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Date:      Mon, 06 Jul 2020 13:46:57 +0000
From:      bugzilla-noreply@freebsd.org
To:        ports-bugs@FreeBSD.org
Subject:   [Bug 247802] net/samba410 samba_dnsupdate fails running with -g
Message-ID:  <bug-247802-7788@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D247802

            Bug ID: 247802
           Summary: net/samba410 samba_dnsupdate fails running with -g
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: timur@FreeBSD.org
          Reporter: byrnejb@harte-lyne.ca
          Assignee: timur@FreeBSD.org
             Flags: maintainer-feedback?(timur@FreeBSD.org)

[root@smb4-1 ~ (master)]# freebsd-version
12.1-RELEASE-p6

[root@smb4-1 ~ (master)]# pkg info -x samba
samba-nsupdate-9.14.2_1
samba410-4.10.15


[root@smb4-1 ~ (master)]# cat /usr/local/etc/smb4.conf
[global]
. . .
  # DNS=20=20
  dns forwarder =3D 192.168.18.161 216.185.71.33
  # Note diff: sbin vs. bin and _ vs. - and dns vs. ns
  dns update command =3D /usr/local/sbin/samba_dnsupdate
  nsupdate command =3D /usr/local/bin/samba-nsupdate -d -g
  #allow dns updates =3D secure only | nonsecure | disabled
  allow dns updates =3D nonsecure
  rndc command =3D /usr/bin/true
. . .


[root@smb4-1 ~ (master)]# samba_dnsupdate --verbose
IPs: ['192.168.18.161']
. . .
Looking for DNS entry SRV
_ldap._tcp.Default-First-Site-Name._sites.brockley.harte-lyne.ca
SMB4-1.brockley.harte-lyne.ca 389 as
_ldap._tcp.Default-First-Site-Name._sites.brockley.harte-lyne.ca.
Traceback (most recent call last):
  File "/usr/local/sbin/samba_dnsupdate", line 320, in check_dns_name
    ans =3D check_one_dns_name(normalised_name, d.type, d)
  File "/usr/local/sbin/samba_dnsupdate", line 296, in check_one_dns_name
    ans =3D resolver.query(name, name_type)
  File "/usr/local/lib/python3.7/site-packages/dns/resolver.py", line 992, =
in
query
    timeout =3D self._compute_timeout(start, lifetime)
  File "/usr/local/lib/python3.7/site-packages/dns/resolver.py", line 799, =
in
_compute_timeout
    raise Timeout(timeout=3Dduration)
dns.exception.Timeout: The DNS operation timed out after 30.00392723083496
seconds

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/sbin/samba_dnsupdate", line 851, in <module>
    elif not check_dns_name(d):
  File "/usr/local/sbin/samba_dnsupdate", line 322, in check_dns_name
    raise Exception("Timeout while waiting to contact a working DNS server
while looking for %s as %s" % (d, normalised_name))
Exception: Timeout while waiting to contact a working DNS server while look=
ing
for SRV _ldap._tcp.Default-First-Site-Name._sites.brockley.harte-lyne.ca
SMB4-1.brockley.harte-lyne.ca 389 as
_ldap._tcp.Default-First-Site-Name._sites.brockley.harte-lyne.ca.

If the -g is removed from 'nsupdate command =3D /usr/local/bin/samba-nsupda=
te'
then the error disappears.

If the -g is retained and smb4.conf contains: 'allow dns updates =3D secure=
 only'
then the following error is encountered instead:

[root@smb4-1 ~ (master)]#  samba_dnsupdate --verbose -d8 --all-names
. . .
update(nsupdate): SRV
_ldap._tcp.Default-First-Site-Name._sites.ForestDnsZones.brockley.harte-lyn=
e.ca
SMB4-1.brockley.harte-lyne.ca 389
Calling nsupdate for SRV
_ldap._tcp.Default-First-Site-Name._sites.ForestDnsZones.brockley.harte-lyn=
e.ca
SMB4-1.brockley.harte-lyne.ca 389 (add)
Starting GENSEC mechanism gssapi_krb5_sasl
GSSAPI credentials for SMB4-1$@BROCKLEY.HARTE-LYNE.CA will expire in 35998 =
secs
Successfully obtained Kerberos ticket to DNS/SMB4-1.brockley.harte-lyne.ca =
as
SMB4-1$
Outgoing update query:
;; ->>HEADER<<- opcode: UPDATE, status: NOERROR, id:      0
;; flags:; ZONE: 0, PREREQ: 0, UPDATE: 0, ADDITIONAL: 0
;; UPDATE SECTION:
_ldap._tcp.Default-First-Site-Name._sites.ForestDnsZones.brockley.harte-lyn=
e.ca.
900 IN SRV 0 100 389 SMB4-1.brockley.harte-lyne.ca.

; TSIG error with server: tsig indicates error
update failed: NOTAUTH(BADSIG)
Failed nsupdate: 2
Failed update of 29 entries



Given the difficulties I experience when enabling secure updates as detailed
here and elsewhere I need to ask: do secure dns updates actually work with =
the
internal DNS in samba410 on FreeBSD?  Are they supposed to? In other words:=
 is
this a feature that is not fully implemented?

--=20
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