Manually creating access control lists

Varnish allows you to use access control lists (ACLs), a feature that enables fast matching of a client's IP address against a list of defined IP addresses. An ACL looks like this:

1
2
3
4
5
6
# Who is allowed access ...
acl local {
  "localhost";
  "192.0.2.0"/24; /* and everyone on the local network */
  ! "192.0.2.1"/32; /* except for the dial-in router */
}

Defining an ACL

Using ACLs requires you to create and add custom VCL to Fastly's boilerplate VCL. To define an ACL in your Fastly configuration:

1. Read about how to mix and match custom VCL with Fastly VCL.

2. Create a custom VCL file with your ACL definitions included in the appropriate location. Use the example shown below as a guide. You can reference the ACL in your configuration (vcl_recv) using a match operation that can be located above or below #FASTLY recv. The placement only matters for the order of operations within Varnish's execution of your configuration.

   1
   2
   3
   4
   5
   6
   7
   8
   9
   10
   11
   12
   13
   14
   15
   16
    # If you are using the "include" keyword
    include "myACL1.vcl";
   
    # And/or if you are using an actual ACL block
    acl local {
      "localhost";
      "192.0.2.0"/24; /* and everyone on the local network */
      ! "192.0.2.1"/32; /* except for the dial-in router */
    }
   
    sub vcl_recv {
      # block any requests to Admin pages not from local IPs
      if (req.url ~ "^/admin" && req.http.Fastly-Client-IP !~ local) {
        error 403 "Forbidden";
      }
    }
   

3. Upload the file in the Varnish Configuration area of your service.