Allusion על שבת 45:7

A courtyard having two entrances on two sides, [the owner] needs to kindle [Hanukkah lights] at both, because of suspicion [that he did not light]. But if both entrances are on the same side (and belong to the same house) (Kol Bo), one of them is enough for him. Rem"a: When one kindles at two entrances, he only recites the benedictions by one of them, and kindles the second without a benediction (Nissim of Gerona). However, nowadays, when all kindle actually inside and there is no distinction for the people of the public domain at all, even if a courtyard or house has many entrances on many sides, we kindle only once inside; so it seems to me and so is the widespread custom.