one of my client is facing to connect FTP server everyday.
they have Dynamic ISP of BSNL
BSNL is the India's Largest ISP provider
we are using CSF 4.63 firewall so i just put their local ISP's IP addresss into etc/csf.allow/ file & they can able to login to FTP server
but this problem is causing again once their local ISP's IP address gets changed it self
so i just tell them that buy a new static IP instead of dyanmic but they do not agree with us & we don't want to add whole BSNL IP range in our server firewall this may cause problem to our server performance
so whats the solutions for this
they have Dynamic ISP of BSNL
BSNL is the India's Largest ISP provider
we are using CSF 4.63 firewall so i just put their local ISP's IP addresss into etc/csf.allow/ file & they can able to login to FTP server
but this problem is causing again once their local ISP's IP address gets changed it self
so i just tell them that buy a new static IP instead of dyanmic but they do not agree with us & we don't want to add whole BSNL IP range in our server firewall this may cause problem to our server performance
so whats the solutions for this