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I hosted an application on Digitalocean but I can only access it via IP. I changed the DNS servers yesterday afternoon. What can be?
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If you have done all the procedures correctly.
Ttls also occur in the Domain Name System (DNS), where they are defined by an authoritative name server for a specific resource record. When a cached (recursive) name server queries the name server with authority for a resource record, it caches this record for the time (in seconds) specified by the TTL. If a stub resolve to query the cached name server for the same record before the TTL has expired, the cache server will respond with the resource record already cached, rather than retrieving it from the authority name server again. TTL responses to NXDOMAIN are defined from the minimum SOA record and TTL field of SOA itself and indicate how long a solver can cache the negative answer.
Shorter ttls can cause heavier loads on an autoritative name server, but can be useful when changing the address of critical services such as Web servers or MX records and are therefore frequently downloaded by the DNS administrator before a service is moved, to minimize interruptions .
The units used are seconds. An older common TTL value for DNS was 86400 seconds, which is 24 hours. A TTL value of 86400 would mean that if a DNS record was changed on the autoritative name server, DNS servers around the world could still be displaying the old value of their cache for up to 24 hours after the change.
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