Apache

Documentation

http://httpd.apache.org/docs/2.3/mod/core.html

proxy

The idea is to receive all incoming requests on a single HTTP server. This server, using mod_proxy and mod_rewrite, will route requests to X backend servers, acting as a reverse proxy. This can be done very simply once mod_proxy is installed, by adding lines such as:

RewriteEngine on
RewriteRule ^t(.*)$ http://somewhere.com/ [P,L]

This would route all requests starting with a t to the site somewhere.com and present its contents to the user as if delivered by the front server.

who is hammering my apache?

sudo perl -e '$ip{(split)[0]}++ while <>; print map "$_ : $ip{$_}\n", sort {$ip{$b} <=> $ip{$a}} keys %ip' /var/log/httpd/halfface.se.access.log

POST logging mod_security

/etc/httpd/conf.d/mod_security.conf.bak3 
LoadModule security2_module modules/mod_security2.so

<IfModule !mod_unique_id.c>
  LoadModule unique_id_module modules/mod_unique_id.so
</IfModule>
<IfModule mod_security2.c>
  SecRuleEngine On
  SecAuditEngine on
  SecAuditLog /var/log/httpd/modsec_audit.log
  SecRequestBodyAccess on
  SecUploadKeepFiles On
  SecUploadDir /var/log/httpd/files
  SecAuditLogParts ABIFHZ
  SecDefaultAction "nolog,noauditlog,allow,phase:2"
  SecRule REQUEST_METHOD "POST" "id:1000,phase:2,ctl:auditEngine=On,nolog,pass"
</IfModule>

POST logging mod_dumpio

/etc/httpd/conf.d/mod_dumpio.conf.bak 
LoadModule dumpio_module modules/mod_dumpio.so
<IfModule dumpio_module>
  DumpIOInput On
  DumpIOOutput On
  DumpIOLogLevel warn
</IfModule>

apachectl

Verify apache config file.

apachectl -S -f /etc/httpd/conf/httpd.conf

Is module loaded

apachectl -t -D DUMP_MODULES 2>&1 | grep -i dumpio