On 8/11/19 1:19 PM, Carlos E. R. wrote:
On 11/08/2019 21.21, James Knott wrote:
On 2019-08-11 03:04 PM, Per Jessen wrote:
My solution - for something I need to connect to, I put it in the dhcpv6 config and add dynamic dns updates. In fact, every known device gets a dynamic dns update, visiting devices don't and are given a firewall restricted ipv6 range. I use SLAAC and configure the DNS server with the consistent (usually MAC based) address.
How do you configure the DNS if the prefix is changing every time the router reboots or the ISP sees fit?
Just a theoretical cuestion, you know I don't have an actual prefix.
Carlos, in the situation you've outlined, you *don't* configure DNS. You simply rely on the DNS server provided by the DHCP server.... Where ever that happens to be ISP or locally administered. DNS is name resolution... You send a name and get back an IP address. Maybe IPv4 or IPv6, maybe both depending IP addressing scheme has NOTHING to do with DNS except as a cross reference. SOME DHCP clients send a DNS update, but this tends to only be effective on locally administered DNS servers; Almost never ISC BIND based ones and is usually on Windows AD Domain controller DNS servers. You CAN configure DNS updates on ISC BIND, but I don't. What you're thinking of as "link local address name resolution" actually relies on a multi-cast service known on Linux systems as Avahi and on everything else as Bonjour. Avahi/Bonjour listens for the multicast broadcasts (from a Avahi/Bonjour process) as interfaces come online, and using routines in glibc, present the information for name resolution to the rest of the system. On Linux systems, this behavior is configured via the file /etc/nsswitch. Browsers don't support or not support link local resolution... The system name resolution mechanisms have to be configured for it. OS X comes that way, install certain Apple products on a Windows system and you get the needed configs. Linux, you get to fiddle a bit. Just for fun, fire up Avahi on your system and watch the multicast range... For real fun, turn on pulse audio audio streaming and see what your network does. There is a reason most router discard multicast and why at one point in time they "invented" the mbone. Multicast can be a VERY not nice thing. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org