Is it permissible to make dua to Rasulullah (sallallahu alayhi wasallam), that is, to ask Nabi (sallallahu alayhi wasallam) to direct one's duas to Al

Answer

Dua is made directly to only Allah Ta'ala, not to Nabi (sallallahu alayhi wasallam). In Tawassul only the medium/status of Rasulullah (sallallahu alayhi wasallam) is mentioned. But the Dua is directly to Allah Ta'ala. The one extreme is the Bid'atis who make dua directly to Rasulullah (sallallahu alayhi wasallam). The opposite extreme is the Salafi denial of Tawassul, even if the Dua is directly made to Allah Ta'ala.