All editing must be done on the authoritative nameservers for the given domain. If you are uncomfortable with the command line, you can also update your A records using Web Host Manager.NOTE: Before updating any DNS record, you will want to lower the Time to Live (TTL) values for that zone file. If you have any questions or are not comfortable making these changes yourself, please feel free to contact Heroic Support.===Liquid Web’s Heroic Support is always available to assist customers with this or any other issue.The A record is so important in DNS without which the meaning of mapping hostnames to IP would be absurd. Every domain must have atleast 2 nameservers and if i ask each of them, and if they have domain zone information, I will get authoritative answer. So ns1 will answer authoritatively wheras ns2 won't which will be 'lame' until it is set up properly.To get more in depth understanding, let's use dig tool for First we find the nameservers of example.com: dig NS 2.The simplest way of explaining DNS in one line is to map domain name to IP address. MX records (for mail servers) should contain hostnames NOT IPs.I am not sure how many would know that when somebody types a domain name in IE/firefox, the browser forwards the DNS request asking for ip address from the resolver of ISP (ISP Provider) and the resolver contacts the root servers and then systematically retrieves the IP address within a matter of few milliseconds. Glue records are A records that are associated with NS records to provide "bootstrapping" information to the NS records nameserver. The steps to change the A record are rather straightforward. Due to propagation times involved with making DNS changes, you will want to make sure that you only make changes if they are absolutely needed.
If you do not see the Glue record management link, please contact Gandi support for assistance.A guide to dropping the TTL values can be found here. ( 2010090802 ; serial, todays date todays 86400 ; refresh, seconds 7200 ; retry, seconds 3600000 ; expire, seconds 86400 ) ; minimum, seconds Below is an example of what the zone file looks like from the command line. Glue records are needed when you want to set a domain's nameservers to a hostname that is a subdomain of the domain itself.In such a scenario, if you do not provide the registry with glue records, other nameservers trying to look up the IP address of .DNS (Domain name system) may not be known to most people who use the Internet but it is the real invisible force driving the Internet without which everyone would be seeing numbers and IPs. Use the DOT in the end, whenever you specify a domain name in the DNS zone file.