Arkadşalar Selam,
cpanel üzerinden test.abc.com adında bir adet subdomain oluşturdum sonra ping attım ping aldı buraya kadar sorun yok daha sonra sildim ardından DNS Kayıtlarını Senkronize Et çalıştırdım 10 dk bekledim ama halen test.abc.com ping atabiliyorum ve web tarayıcıdan giriş yapabiliyorum 4 saat sonra düzeliyor. Bunun bir çözümü var mı? anlık veya 5 dk sonra hemen aktif olabilir mi? cpanel destek manuel yapmamı istiyor aşağıdaki gibi bunun otomatik veya kolay bir yöntemi var mı?




This is most likely due to the entry being recorded by the nscd (Name Service Cache Daemon) process, speficifally within the '/var/db/nscd/hosts' file. When you and I initially added and tested these DNS records, our valid requests were cached by this service to mitigate against redundant DNS lookups. This resulted in there being a residual entry for these DNS records that resolved to the IP address set during testing.

After clearing the nscd hosts cache, I was no longer able to ping this address from within your server:

For additional information regarding the nscd service, I would suggest reading the official documentation here:
https://linux.die.net/man/8/nscd

In short, this appears to be an issue caused by a residual caching of the DNS information on your server. Executing 'nscd -i hosts' should quickly resolve this matter if you continue to have issues with older DNS entries still being acknowledged on your server.