On Wed, Mar 2, 2022 at 7:14 AM Matus UHLAR - fantomas via Dnsmasq-discuss < dnsmasq-discuss@lists.thekelleys.org.uk> wrote:
> >> > > On Tue, Mar 01, 2022 at 01:01:51AM -0800, Frank Liu wrote: > >> > > > I am running dnsmasq for dhcp/dns of a local test domain: > test.example.com. > >> > > > Everything works fine. When a dhcp client (eg: client1) comes up, > it gets > >> > > > the IP from dnsmasq, and I can dig/nslookup > client1.test.example.com to get > >> > > > its IP. > >> > > > > >> > > > When I add a cname in the same domain, eg: > >> > > > cname=alias.test.example.com,client1.test.example.com > >> > > > > >> > > > dig/nslookup of alias.test.example.com only returns name > >> > > > client1.test.example.com, not the actual IP of > client1.test.example.com > >> > > > > >> > > > It's interesting that if I add the cname for a different domain, > eg: > >> > > > cname=alias.dummy.example.com,client1.test.example.com > >> > > > > >> > > > dig/nslookup of alias.dummy.example.com will return both name > >> > > > client1.test.example.com and its IP. > >> > > > > >> > > > I tried a few different versions but that doesn't make a > difference. > > >> > On Tue, Mar 1, 2022 at 3:37 AM Geert Stappers via Dnsmasq-discuss > wrote: > >> > > Please name those different versions. > > >> On Tue, Mar 01, 2022 at 09:21:58AM -0800, Frank Liu wrote: > >> > 2.76 (Debian 9), 2.85 (Debian 11). > > >On Tue, Mar 1, 2022 at 2:39 PM Geert Stappers via Dnsmasq-discuss > > <dnsmasq-discuss@lists.thekelleys.org.uk> wrote: > >> Ah, I'm now beyond the ambiguty of different version of dig/nslookup. > > On 02.03.22 01:28, Frank Liu wrote: > >I don't think it matters with test OS or test application. > > it may matter, > > >I also tried: > >ping alias.dummy.example.com works, but ping alias.test.example.com gives > >unknown host error. > >(even though both names cname to the same client1.test.example.com in > >dnsmasq). > > What do there result in? > > dig alias.dummy.example.com alias.test.example.com > client1.test.example.com > dig -t any alias.dummy.example.com alias.test.example.com > client1.test.example.com > > In below test, dnsmasq server (192.168.0.253) runs dnsmasq 2.85 (from Debian11). I have below in the dnsmasq conf: cname=alias.test.example.com,client1.test.example.com cname=alias.dummy.example.com,client1.test.example.com Test client is another Debian11 box $ dig -v DiG 9.16.22-Debian $ dig @192.168.0.253 alias.dummy.example.com alias.test.example.com client1.test.example.com ; <<>> DiG 9.16.22-Debian <<>> @192.168.0.253 alias.dummy.example.com alias.test.example.com client1.test.example.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29718 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;alias.dummy.example.com. IN A ;; ANSWER SECTION: alias.dummy.example.com. 0 IN CNAME client1.test.example.com. client1.test.example.com. 0 IN A 192.168.0.70 ;; Query time: 20 msec ;; SERVER: 192.168.0.253#53(192.168.0.253) ;; WHEN: Wed Mar 02 17:34:27 UTC 2022 ;; MSG SIZE rcvd: 114 ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62870 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;alias.test.example.com. IN A ;; ANSWER SECTION: alias.test.example.com. 5 IN CNAME client1.test.example.com. ;; Query time: 20 msec ;; SERVER: 192.168.0.253#53(192.168.0.253) ;; WHEN: Wed Mar 02 17:34:27 UTC 2022 ;; MSG SIZE rcvd: 96 ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40301 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;client1.test.example.com. IN A ;; ANSWER SECTION: client1.test.example.com. 5 IN A 192.168.0.70 ;; Query time: 16 msec ;; SERVER: 192.168.0.253#53(192.168.0.253) ;; WHEN: Wed Mar 02 17:34:27 UTC 2022 ;; MSG SIZE rcvd: 75 $ dig -t any @192.168.0.253 alias.dummy.example.com alias.test.example.com client1.test.example.com ; <<>> DiG 9.16.22-Debian <<>> -t any @192.168.0.253 alias.dummy.example.com alias.test.example.com client1.test.example.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24227 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;alias.dummy.example.com. IN ANY ;; ANSWER SECTION: alias.dummy.example.com. 0 IN CNAME client1.test.example.com. client1.test.example.com. 0 IN A 192.168.0.70 ;; Query time: 20 msec ;; SERVER: 192.168.0.253#53(192.168.0.253) ;; WHEN: Wed Mar 02 17:34:41 UTC 2022 ;; MSG SIZE rcvd: 114 ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12433 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;alias.test.example.com. IN ANY ;; ANSWER SECTION: alias.test.example.com. 5 IN CNAME client1.test.example.com. ;; Query time: 20 msec ;; SERVER: 192.168.0.253#53(192.168.0.253) ;; WHEN: Wed Mar 02 17:34:41 UTC 2022 ;; MSG SIZE rcvd: 96 ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31132 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;client1.test.example.com. IN ANY ;; Query time: 20 msec ;; SERVER: 192.168.0.253#53(192.168.0.253) ;; WHEN: Wed Mar 02 17:34:41 UTC 2022 ;; MSG SIZE rcvd: 59
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