Which VPN-1/FireWall-1 Security Server can hide real user names by rewriting information in the From

Which VPN-1/FireWall-1 Security Server can hide real user names by rewriting information in the
From field, while maintaining connectivity by restoring correct addresses in the response?

A.
RLOGIN

B.
SMTP

C.
FTP

D.
TELNET

E.
HTTP