Creating private nameserver in 1 & 1 Domain provider

1. Log into your 1&1 account.
2. Go to your Domain Manager. Depending on the type of package you have, the way you get to your domain manager may be slightly different.
3. Select New > Create Subdomain.
4. In the empty box, type NS1.
5. From the drop-down box, select the domain for which the nameservers are being created.
6. Select OK.
7. Repeat steps 3 through 6 for NS2.
8. Check the box next to NS1.YourDomain.TLD.
9. Select DNS > Edit DNS Settings.
10. In the Advanced DNS Settings, select Other IP Address.
11. Enter the IP address of NS1.
12. Click OK.
13. Click Go To Overview.
14. Repeat steps 7 through 12 for NS2.
15. Check the box next to the domain you wish to point to your private nameservers.
16. Select DNS > Edit DNS Settings.
17. In the Basic DNS Settings section, select My name server from the drop-down menu.
18. In the Advanced DNS Settings section, find Primary name server and enterNS1.YourDomain.TLD.
19. In the Advanced DNS Settings section, find Secondary name server and enterNS2.YourDomain.TLD.
20. Click OK.
21. Click Go To Overview.

You can check your work by selecting DNS > Show DNS Settings. It can take up to 48 hours for your new private nameservers to propagate.