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List:       opensuse
Subject:    [opensuse] can a dhcp client (isc or wicked) prevent the dhcp server from doing dynamic dns updates?
From:       Per Jessen <per () computer ! org>
Date:       2016-09-26 13:11:14
Message-ID: nsb6pi$ngf$1 () saturn ! local ! net
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I am moving to dynamic DNS updates for our IPv6 desktops, overall no 
problems, but somehow not all desktops cause a DNS update when they 
receive an IPv6 address.  

With Leap421 and 422 it works fine, when I do e.g. "ifdown ethX && ifup 
ethX", I see:

Sep 26 14:20:25 dresden dhcpd: if linux-asdf.local.net. IN TXT \
"02a51a7c9422e02aee9eb9b670aae20cc1" rrset exists and linux-asdf.local.net. IN AAAA \
2001:db8:4c68:1:ff99::34 rrset exists delete linux-asdf.local.net. IN AAAA \
2001:db8:4c6 8:1:ff99::34: success.
Sep 26 14:20:25 dresden dhcpd: if linux-asdf.local.net. IN A rrset doesn't exist and \
linux-asdf.local.net. IN AAAA rrset doesn't exist delete linux-asdf.local.net. IN TXT \
                "02a51a7c9422e02aee9eb9b670aae20cc1": success.
Sep 26 14:20:25 dresden dhcpd: removed reverse map on \
                4.3.0.0.0.0.0.0.0.0.0.0.9.9.f.f.1.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa.
                
Sep 26 14:20:29 dresden dhcpd: DHCPREQUEST for 192.168.3.34 from 00:18:fe:6a:73:0b \
                via eth0
Sep 26 14:20:29 dresden dhcpd: DHCPACK on 192.168.3.34 to 00:18:fe:6a:73:0b via eth0
Sep 26 14:20:31 dresden dhcpd: Solicit message from fe80::218:feff:fe6a:730b port \
                546, transaction ID 0x75DE6100
Sep 26 14:20:31 dresden dhcpd: Sending Advertise to fe80::218:feff:fe6a:730b port 546
Sep 26 14:20:32 dresden dhcpd: Request message from fe80::218:feff:fe6a:730b port \
                546, transaction ID 0x55CADE00
Sep 26 14:20:32 dresden dhcpd: data: leased_lease: not available
Sep 26 14:20:32 dresden dhcpd: Added new forward map from linux-34.local.net. to \
                2001:db8:4c68:1:ff99::34
Sep 26 14:20:32 dresden dhcpd: added reverse map from \
4.3.0.0.0.0.0.0.0.0.0.0.9.9.f.f.1.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa. to \
linux-34.local.net.

With desktops running openSUSE 13.1 (isc dhcp client), the client end
works fine, but I don't get DNS updated.  It seems as if something in 
the client request can control the dynamic DNS update?  


-- 
Per Jessen, Zürich (18.8 °C)
http://www.dns24.ch/ - your free DNS host, made in Switzerland.

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