The IT department is contacted by Joe, an end-user, who is unable to connect to the corporate
IPsec VPN from outside of his corporate network. Joe confirms he can connect to popular web
pages. Which of the following would cause this issue?

A.
Port 80 is blocked

B.
Port 587 is blocked

C.
Port 4200 is blocked

D.
Port 5223 is blocked

Explanation: