Our site is experiencing a denial of service attack, spam, or getting hacked. How to block IP addresses at the Apache HTTP Server (AEM Dispatcher) level?
Most Web Application Firewalls (WAF), such as mod security, can block lists of IP addresses. However, if you are running Apache HTTP Server and would like to block IP’s immediately follow these steps:
If the request is proxied (via CDN, Load Balancer, etc) and the remote user’s IP is only in a Header such as X-Forwarded-For then this configuration can be used. Note that this configuration doesn’t apply if the remoteip_module is configured.
LocationMatch ``"/.*"````Order Allow,Deny``Allow from all``SetEnvif X-Forwarded-For ``"10\.42\.137\.123"
DenyAccess``SetEnvif X-Forwarded-For ``"122\.6\.218\.101" `DenyAccess
#Repeat the "SetEnvlf X-Forwarded-For ..." for each IP you want to blockDeny from
Alternatively, if the remote user is directly accessing Apache or you are using remoteip_module (see 1) to extract and set it within Apache then you can use mod_authz_core’s Require feature directly (Apache 2.4).
Require all granted
Require not ip 10.42.137.123
Require not ip 126.96.36.199
#Repeat the "Require not ip ..." for each IP you want to block
# Extract true client IP from header added by load balancer/CDN
# valid for ELB or ELB+CloudFront