What is "Sogeres u'Mesugeres"?
Rashi: It is like the Targum
What is the Chidush "no one may leave or come [in]?
Targum Yonasan: No one may leave for war; no one may come in for Shalom.
Radak: This explains the Reisha "Sogeres u'Mesugeres."
Malbim: This shows that no one could show Yisrael where is the entrance (whereas for Luz, someone showed them