What is the ruling on doing masah over regular socks for wudu? Is it permissible? Also, what is the method of doing masah over leather socks?
Masah should be made on the top section of the leather socks and not on the soles. The method of performing the masah is that after wetting the fingers, they should be placed in the front i.e. the toes. Place the fingers flat on the socks with the palms away from them. Thereafter, draw or pull the fingers towards the ankles. If the palms are also placed flat on the socks together with the fingers, it will be permissible. (Bahishti Zewar vol. 1, pg. 95) 
Mufti Faizal Riza