Htaccess help part 2

order deny,allow deny from all allow from allow from

ErrorDocument 403
ErrorDocument 404 /missing.html
ErrorDocument 500 /internal_error.html

my htaccess file is located in my root level

what do i need to add so that my allowed domain and ip will not be redirected to my forbidden page? and so they will be able to download files?

Again, please explain in layman’s terms? I am very new to this.

Thanks in advance!