Varnish VCL "plugin" that geolocates client IP addresses (requires geoip)
C Perl Makefile
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Varnish Geo-IP VCL

Last updated: 10/02/2010
	Cosimo Streppone <>
	Opera Software ASA

Here you will find a VCL config file for Varnish (
This VCL will transparently add a HTTP request header with Geo-IP information
depending on the client IP address that made the request.

*** WARNING ***
This VCL consists of C code. Your Varnish might explode. YMMV.
Don't use it in production if you don't know what you're doing.
We are using it in production, but we _don't_ know what we're doing :).

Why would you want this?
So your backend application can just read a HTTP header and figure out
where the client comes from, city, country and latitude/longitude.
Of course this doesn't come for free. You need the city edition of Geo-IP.

The rewritten header is "X-Geo-IP".


- gcc, make
- a recent perl, with `prove'


1) Run 'make && make test'
   You should see "All tests successful" at the end of the execution

2) Install the generated geoip.vcl in /etc/varnish/

3) At the top of your main VCL file, add the following line:

     include "/etc/varnish/geoip.vcl"

   and then in your vcl_recv() add:


4) Restart Varnish

5) Cross your fingers

6) Profit !!