# mod_evasive configuration LoadModule evasive20_module modules/mod_evasive24.so # The hash table size defines the number of top-level nodes for each # child's hash table. Increasing this number will provide faster # performance by decreasing the number of iterations required to get to the # record, but consume more memory for table space. You should increase # this if you have a busy web server. The value you specify will # automatically be tiered up to the next prime number in the primes list # (see mod_evasive.c for a list of primes used). DOSHashTableSize 3097 # This is the threshhold for the number of requests for the same page (or # URI) per page interval. Once the threshhold for that interval has been # exceeded, the IP address of the client will be added to the blocking # list. DOSPageCount 2 # This is the threshhold for the total number of requests for any object by # the same client on the same listener per site interval. Once the # threshhold for that interval has been exceeded, the IP address of the # client will be added to the blocking list. DOSSiteCount 50 # The interval for the page count threshhold; defaults to 1 second # intervals. DOSPageInterval 1 # The interval for the site count threshhold; defaults to 1 second # intervals. DOSSiteInterval 1 # The blocking period is the amount of time (in seconds) that a client will # be blocked for if they are added to the blocking list. During this time, # all subsequent requests from the client will result in a 403 (Forbidden) # and the timer being reset (e.g. another 10 seconds). Since the timer is # reset for every subsequent request, it is not necessary to have a long # blocking period; in the event of a DoS attack, this timer will keep # getting reset. DOSBlockingPeriod 10 # If this value is set, an email will be sent to the address specified # whenever an IP address becomes blacklisted. A locking mechanism using # /tmp prevents continuous emails from being sent. # # NOTE: Requires /bin/mail (provided by mailx) #DOSEmailNotify you@yourdomain.com # If this value is set, the system command specified will be executed # whenever an IP address becomes blacklisted. This is designed to enable # system calls to ip filter or other tools. A locking mechanism using /tmp # prevents continuous system calls. Use %s to denote the IP address of the # blacklisted IP. #DOSSystemCommand "su - someuser -c '/sbin/... %s ...'" # Choose an alternative temp directory By default "/tmp" will be used for # locking mechanism, which opens some security issues if your system is # open to shell users. # # http://security.lss.hr/index.php?page=details&ID=LSS-2005-01-01 # # In the event you have nonprivileged shell users, you'll want to create a # directory writable only to the user Apache is running as (usually root), # then set this in your httpd.conf. #DOSLogDir "/var/lock/mod_evasive" # You can use whitelists to disable the module for certain ranges of # IPs. Wildcards can be used on up to the last 3 octets if necessary. # Multiple DOSWhitelist commands may be used in the configuration. #DOSWhitelist 127.0.0.1 #DOSWhitelist 192.168.0.*