DNS Delegation on IPv4
by Bashed from LinuxQuestions.org on (#5BF61)
I use my own ns1/ns2 for DNS delegation with ARIN. I edit rDNS per /24, per zone file via cPanel/WHM or SSH console. The zones are created via WHM interface, easily for me.
Now, recently I acquired a legacy block of IPv4 from an ISP. Because it's legacy, they're only able to do a reallocation in ARIN to my account and DNS can only be updated on the full subnet size, let's use /20 for example. I cannot do the usual per /24 DNS delegation in ARIN just because they are legacy IPs.
So my question is, if a client asked for full DNS delegation, like the example below, how would I set this up for them?
Code:xxx.xxx.16.0/24
ns1.theirdomain.com
ns2.theirdomain.com Whether it's a /24 or larger, what would the dns zone file look like?
Below is an example of one created by cPanel and I update for individual IPs per /24, however a full DNS delegation I'm not sure how to do once I update the NS for the /20 with ARIN to point to ns1/ns2.mydomain.com
Example DNS zone for individual IPs on a /24
Code:Filename: 36.222.111.in-addr.arpa.dbIn summary, I will have to do full DNS delegation on the whole /20 legacy block to ns1/ns2.mydomain.com and then on my DNS server, will have to server /24 or larger DNS delegation per client as needed. This is where I do not know what the zone file should look like.
Now, recently I acquired a legacy block of IPv4 from an ISP. Because it's legacy, they're only able to do a reallocation in ARIN to my account and DNS can only be updated on the full subnet size, let's use /20 for example. I cannot do the usual per /24 DNS delegation in ARIN just because they are legacy IPs.
So my question is, if a client asked for full DNS delegation, like the example below, how would I set this up for them?
Code:xxx.xxx.16.0/24
ns1.theirdomain.com
ns2.theirdomain.com Whether it's a /24 or larger, what would the dns zone file look like?
Below is an example of one created by cPanel and I update for individual IPs per /24, however a full DNS delegation I'm not sure how to do once I update the NS for the /20 with ARIN to point to ns1/ns2.mydomain.com
Example DNS zone for individual IPs on a /24
Code:Filename: 36.222.111.in-addr.arpa.dbIn summary, I will have to do full DNS delegation on the whole /20 legacy block to ns1/ns2.mydomain.com and then on my DNS server, will have to server /24 or larger DNS delegation per client as needed. This is where I do not know what the zone file should look like.