The ban file's CPU consomation

[scott512]

Hi all,

Is there a limit in the number of IP ranges in the ban file ?
Because I use a file with 500 IPs, and I want to know if the DNA server can crash because of this number of IPS ?

Thanks for your answers.

Scott.

[djSpinnerCee]

Large ban and reserve lists should not crash the server, but they will certainly slow it down because it must consult the list (a disk read) and compare every connection request against every entry in the list. Moreover, when a connection request IP is not found in the list, the initial connection delay (to the listener) and CPU utilization will be the greatest.

If the RAM overhead is low, you could experience memory starvation if the list must be resident in memory during the check. Low RAM can cause memory related errors that can crash applications.