Varnish Change Web Server Signature Headers

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I‘m using Varnish cache infront of Apache web server and I’d like change my web server signature from

Apache/2.2.8 (Ubuntu) mod_python/3.3.1 Python/2.5.2 mod_ssl/2.2.8 OpenSSL/0.9.8g


Apache Web server

How do I change headers using Varnish?

You can simply use the following configuration (edit Varnish config file) and append the following configuration:

unset beresp.http.Server;
set beresp.http.Server = "Apache Web Server";

Save and close the file. Restart Varnish:
# /etc/init.d/varnish restart
# /etc/init.d/varnish reload

How Do I Test New Headers?

Simply use curl command as follows:
$ curl -I
$ curl -I

Sample outputs:

HTTP/1.1 200 OK
Server: Apache Web Server
Content-Type: text/html; charset=utf-8
Status: 200 OK
X-UA-Compatible: IE=7
ntCoent-Length: 163218
X-Varnish: 3079018010 3079016087
Expires: Thu, 08 Jul 2010 16:21:52 GMT
Cache-Control: max-age=0, no-cache, no-store
Pragma: no-cache
Date: Thu, 08 Jul 2010 16:21:52 GMT
Connection: keep-alive

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

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  1. I put the code on /etc/varnish/default.vcl on my centos box but varnish failed to start

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