Delegating a Subdomain + NSD setup
First time with DNS, but I need to delegate a subdomain to my own DNS.
Is it possible in DO interface ?
I'll enumerate my questions to make it easier to reply :)
1) Is this right what i'm doing on screenshots?
First one is DNS records of exampledomain.com (not real) that delegated to ns1.digitalocean.com as usual, it works fine.
Second is what im trying. I add a domain "sub.exampledomain.com" and add NS record to it.
So it works like that?
2) In 2nd screenshot i put two "glue" A records - it's just i tried to make it work. I'm not sure is they need there or not? Because already have A record for ns1.exampledomain.com in the parent domain interface (1st screenshot).
3) I'm also trying to realise, can i use for my subdomain only one master-only NS server without slave.
Or if not, I'm thinking can i use my ns1.exampledomain.com as master, and ns1.digitalocean.com as slave. And also i have seen living examples where ns1 and ns2 have the same IP...
(Reliability issues i do not care.)
(But the reliability of the main domain worries me, and that's why i do not want to setup my own DNS for the main domain itself, and why trying to setup a subdomain for my purposes)
4) Server part. I use NSD server
zone: name: "sub.exampledomain.com" zonefile: "sub.exampledomain.com.zone" ;notify: 220.127.116.11 NOKEY ;provide-xfr: 18.104.22.168 NOKEY
ORIGIN sub.exampledomain.com. $TTL 1800 @ IN SOA ns1.exampledomain.com. hostmaster.exampledomain.com. ( 2015080800 ; serial number 3600 ; refresh 900 ; retry 180000 ; expire 1800 ; ttl ) IN NS ns1.exampledomain.com. ;IN NS ns1.digitalocean.com. ns1 IN A 22.214.171.124
But what I see it still not working, not resolving (after hours), and SOA record still in ns1.digitalocean.com
$ dig sub.exampledomain.com any +multiline ; <<>> DiG 9.10.2-P2 <<>> sub.exampledomain.com any +multiline ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31654 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;sub.exampledomain.com. IN ANY ;; ANSWER SECTION: sub.exampledomain.com. 1456 IN NS ns1.exampledomain.com. sub.exampledomain.com. 1456 IN SOA ns1.digitalocean.com. hostmaster.sub.exampledomain.com. ( 1439102949 ; serial 10800 ; refresh (3 hours) 3600 ; retry (1 hour) 604800 ; expire (1 week) 1800 ; minimum (30 minutes) ) ;; Query time: 10 msec ;; SERVER: 126.96.36.199#53(188.8.131.52) ;; MSG SIZE rcvd: 128
I use debug-mode: yes and verbosity: 2 in nsd.conf.
But only message i saw in /var/log/nsd.log is :
error: xfrd: zone sub.exampledomain.com: max notify send count reached, 184.108.40.206 unreachable
after I tried to add ns1.digitalocean.com as slave (commented line in nsd.conf and sub.exampledomain.com.zone). Also tried to add reverse zones, but not helps, and i'm not sure whether they are necessary to me.
Would be very grateful if someone answers to at least some of my questions. And I'm going to read the DNS AND BIND book ... :))