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(Not Applicable on AEM as a Cloud Service):
block-offending-ips.conf
on your serverA. 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,DenyAllow from allSetEnvif X-Forwarded-For "10\.42\.137\.123" DenyAccessSetEnvif X-Forwarded-For "122\.6\.218\.101" DenyAccess#Repeat the "SetEnvlf X-Forwarded-For ..." for each IP you want to blockDeny from env=DenyAccess /LocationMatch
B. 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).
LocationMatch "/.*" RequireAllRequire all grantedRequire not ip 10.42.137.123Require not ip 122.6.218.101#Repeat the "Require not ip ..." for each IP you want to block /RequireAll /LocationMatch
1
# Extract true client IP from header added by load balancer/CDN IfModule remoteip_module # valid for ELB or ELB+CloudFront RemoteIPHeader X-Forwarded-For /IfModule |
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Drop the file block-offending-ips.conf
in /etc/conf.d
folder of the Apache Web server.
Restart the Apache HTTP Server.