The Magic DIrk

When Apache web server with SSL is starting up in FreeBSD system, Apache loads succcessfully and web server functioning properly, but the following warning error occurs:

[warn] (2)No such file or directory: Failed to enable the 'dataready' Accept Filter

The resolution to the above problem is to a accf_data module, which function is to prevents the application from receiving the connected descriptor via accept() until data arrives on the connection, into FreeBSD kernel by using kernel linker:

kldload accf_data

To permanently load enable data Accept Filter FreeBSD kernel module (accf_data), add the following line into /boot/loader.conf:

accf_data_load=”YES”

Note: The default settings is located in /boot/defaults/loader.cnf. To see the related settings about accf, use:

grep accf /boot/defaults/loader.conf

which will returns:

accf_data_load=”NO” # Wait for data accept filter
accf_http_load=”NO” # Wait for full HTTP request accept filter