I finally solved this, by one of this configurations or maybe both of them.
System->Settings->General->Gateway switching->Enabled
System->Settings->General->Configured Fixed DNSs, google and cloudflare. If not, some DNS from the other provider would get stuck in resolv file and it would not work correctly.
PS: Interface should be set as "None" when configuring ddclient.
System->Settings->General->Gateway switching->Enabled
System->Settings->General->Configured Fixed DNSs, google and cloudflare. If not, some DNS from the other provider would get stuck in resolv file and it would not work correctly.
PS: Interface should be set as "None" when configuring ddclient.
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