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Asked: 2011-07-14 18:10:58 +0800 CST

How do I SetEnv only for a specific IP in Apache?

  • 772

I want to set some environment only for a specific IP,how to do that in Apache?

apache-2.2

2 Answers

  1. See the SetEnvIf directive, which defines environment variables based on attributes of the request, such as Remote_Addr (the IP address of the client making the request)...

    SetEnvIf Remote_Addr ^192\.168\.0\. LOCAL_LAN=1

    ...or Server_Addr (the IP address of the server on which the request was received)...

    SetEnvIf Server_Addr ^192\.168\.0\.1$ SITE_PROFILE=PRODUCTION
SetEnvIf Server_Addr ^192\.168\.0\.2$ SITE_PROFILE=DEVELOPMENT

    Note that the second argument to SetEnvIf is a regular expression, so be extra mindful if you're tempted to use bare IPs, as a pattern like 192.168.1.1 (while looking a lot cleaner than escaping dots as I do above) will also end up matching 192.168.101.10.

    UPDATE:

    SetEnvIf can't access QUERY_STRING, but per the docs:-

    See the RewriteCond directive of mod_rewrite for extra information on how to match your query string.

    So something like...

    RewriteCond %{REMOTE_ADDR} ^192\.168\.0\.
RewriteCond %{QUERY_STRING} (^|&)debug=
RewriteRule . - [E=LOCAL_LAN_AND_DEBUG:1]
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  2. In Apache 2.4 you can set an environment variable for a single IP address or a whole subnet using CIDR notation. Eg.:

    <If "-R '93.184.216.34'">
  SetEnv myvar1=example
</If>

<If "-R '93.184.216.0/24'">
  SetEnv myvar2=subnet
</If>

    These can also be combined with logical operators inside the expression:

    <If "-R '93.184.216.34' || 
     -R '192.0.32.0/24'">
  SetEnv myvar3=both
</If>
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