What is a Glue Record? Can a Glue Record be created in Openprovider?
Glue records are the entries that must be created in the registry to allow correct DNS resolution of domains whose nameserver objects comprise of the domain name itself.
Imagine that one registered the domain example.com and then uses the same name as a nameserver to create ns1.example.com and ns2.example.com.
The problem is that whenever one wants to access example.com one will have to request ns1.example.com or ns2.example.com to resolve the address. This can become a loop without prior knowledge of the address of ns1.example.com.
The solution is Glue records which provide an A record to one's server so that when trying to resolve ns1.example.com the IP address will be served by the registry's nameservers.
NB: Although Glue records are created, you must also create the A records to the respective hosts IP (ns1.example.com and ns2.example.com) in the DNS zone of the domain.
As long as the domain is registered in Openprovider, Glue records can be created on Domain management > Nameservers, or just clicking here.
Please note that any nameserver related changes to domain objects might take several hours to propagate across public DNS resolvers.