Block / Restrict FTP Users by TCP Wrapper
In Redhat Linux a ftp user can be blocked by admin by tcp wrapper. By blocking /restricting thew ftp users, they can’t access the server files through FTP method. TCP Wrapper need a package called XINETD
Package name: Xinetd
Service name: Xinetd
We are going to block the FTP users, so we have to edit hosts.deny file
#vim /etc/hosts.deny
Block all FTP request and login, except the IP address 192.168.1.10
Any user can login from the IP address 192.168.1.10
vsftpd: ALL EXCEPT 192.168.1.10
#vim /etc/hosts.deny
Blcok all FTP access(login) for the whole network 192.168.1.0/24
vsftpd: ALL EXCEPT 192.168.1.0/24
( or )
vsftpd: ALL EXCEPT 192.168.1.0/255.255.255.0
#vim /etc/hosts.deny
None of the FTP users can login into the server.
vsftpd: ALL
