If it isn't, or even if it is, you can change your DNS settings to use a more robust server than the one your ISP recommends.
Ọ bụrụ na ọ bụghị (maọbụ ma ọ bụrụ na ọ bụ), ọ bụrụ na-ịchọrọ, ị nwere ike ịgbanwe ntọala DNS gị iji jie ihe nkesa siri ike karịa nke onye ISP na-akwado.