18) 212.2 Managing FTP servers

"It's a service that uses two ports for communication. Port 21 is used for the command and port 20 for the data port"

• SSH

• TFTP

• FTP

• Telnet

Which are the two modes FTP has?

• off

• Active

• Passive

• On

• Interactive

"In this FTP mode, the client sends to the server the IP address and port number on which the client will listen for the data connection".

• off

• Active

• Passive

• On

• Interactive

"In this FTP mode, the FTP server sends an ACK to the client command port and actively opens a data connection on port 20 to the client. The client sends back an ACK on the data connection".

• off

• Active

• Passive

• On

• Interactive

"This mode is recommended when the client is behind a firewall and unable to accept incoming TCP connections".

• off

• Active

• Passive

• On

• Interactive

"In this mode, the client sends a PASV command to the server, and receives an IP address and port number in return".

• off

• Active

• Passive

• On

• Interactive

Type the full module that should be loaded into the firewall when using iptables in order of enabling passive FTP connections:

"It's a very popular, versatile, fast and secure FTP server"

• ProFTPD

• vsftpd

• Pure-ftpd

• CrushFTP

• FileZilla Server

Which command creates the "ftp" user with the home directory /var/ftp/ and without command-shell?

• useradd ftp --home /var/ftp -s

• useradd --home /var/ftp --shell /bin/false ftp

• useradd /var/ftp --shell /bin/false ftp

• useradd -d /var/ftp -sh /bin/false

"It's a highly flexible, secure and fast FTP server"

• ProFTPD

• vsftpd

• Pure-ftpd

• CrushFTP

• FileZilla Server