user92738: I want to add DNS seeds – like bitcoin – to my alt-coin. Is bitcoins generate-seeds.py and makeseeds.py the scripts to register DNS-seed ips?

user48884: 
Is bitcoins generate-seeds.py and makeseeds.py the scripts to register DNS-seed ips?

No, not at all. Those scripts are for creating the hardcoded seed nodes list which is retrieved from an existing DNS seeder.
To add a DNS seeder, you would need to add it to the list of DNS seeders in src/chainparams.cpp. Furthermore, you need to have a running DNS seeder which requires special software. One such is https://github.com/sipa/bitcoin-seeder.

92738: <p>I want to add DNS seeds – like bitcoin – to my alt-coin. Is bitcoins generate-seeds.py and makeseeds.py the scripts to register DNS-seed ips?</p>
 48884: <blockquote>
  <p>Is bitcoins generate-seeds.py and makeseeds.py the scripts to register DNS-seed ips?</p>
</blockquote>

<p>No, not at all. Those scripts are for creating the hardcoded seed nodes list which is retrieved from an existing DNS seeder.</p>

<p>To add a DNS seeder, you would need to add it to the list of DNS seeders in <a href="https://github.com/bitcoin/bitcoin/blob/master/src/chainparams.cpp#L123" rel="nofollow noreferrer">src/chainparams.cpp</a>. Furthermore, you need to have a running DNS seeder which requires special software. One such is <a href="https://github.com/sipa/bitcoin-seeder" rel="nofollow noreferrer">https://github.com/sipa/bitcoin-seeder</a>.</p>
