Am 28.05.2024 um 12:00:09 Uhr schrieb Peter: > if I understand corrently, the use of CNAME is just a convenience > and no technical feature, right?
It is technical because the query is redirected to the domain listed in the CNAME. > In lots of examples on the net, a zonefile for a domain might contain > things similar to this: > > @ORIGIN example.com. > .. > myhost A 1.2.3.4 > www CNAME myhost.example.com. > www1 CNAME myhost.example.com. > someapp CNAME myhost.example.com. > xyz CNAME myhost.example.com. > ... That all points to this node, e.g. because multiple services are running on the same machines, but it should be possible to separate them when needed without changing domain names on other machines that need to access them. When the IP address changes, only the records of the machine listed in CNAME need to be changed at one place. > Often, the webserver and other applications are not actually > running on node 1.2.3.4, but are internally portforwarded to > some other node, for various reasons. This is bad IPv4 stuff, you should get rid off that ASAP. Use CNAMEs for each node that exists in reality and point to it with CNAME. > Now we add an IPv6 address for 'myhost'. But portforwarding > doesn't work for IPv6. Instead we are required to use different > addresses all over, like so: port forwarding would work, but is nasty here. Redirectors like rinetd can handle that, but I recommend against in this case. > So, how would you do it? Is there a nice and elegant way? www CNAME webserver1 ftp CNAME ftp2 webserver1 A 192.168.0.1 webserver1 AAAA 2001:db8::1 ftp2 A 172.16.0.1 ftp2 AAAA 2001:db8:9999::1 That makes it possible to redirect it to the actual machines that runs the service. -- Gruß Marco Send unsolicited bulk mail to 1716890409mu...@cartoonies.org -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
