MY VCL:

        if (req.method == "PURGE") {
                if (!client.ip ~ purge) {
                        return (synth(000, "Not Allowed"));
                }
                return (purge);
        }

Varnishlog:

-   ReqMethod      PURGE
-   ReqURL         XXXXXXXXXXXXXXXXXXXXXXXXXXXX
-   ReqProtocol    HTTP/1.1
-   ReqHeader      User-Agent: XXXXXXXXXXXXXXXXXXXXXXXXXX
-   ReqHeader      Accept: */*
-   ReqHeader      Host:XXXXXXXXXXXXXXXXXXXXXXXXX
-   ReqHeader      X-Forwarded-For: ::1
-   VCL_call       RECV
-   ReqUnset       Host:XXXXXXXXXXXXXXXX
-   ReqHeader      host: XXXXXXXXXXXXXX
-   VCL_acl        MATCH purge "localhost"
-   VCL_acl        MATCH purge "localhost"
-   VCL_return     purge
-   VCL_call       HASH
-   VCL_return     lookup
-   VCL_call       PURGE
-   Debug          "VCL_error(200, Purged)"
-   VCL_return     synth
-   Timestamp      Process: 1406541624.863881 0.000110 0.000110
-   RespHeader     Date: Mon, 28 Jul 2014 10:00:24 GMT
-   RespHeader     Server: Varnish
-   RespHeader     X-Varnish: 3607188
-   RespProtocol   HTTP/1.1
-   RespStatus     200
-   RespReason     OK
-   RespReason     Purged
-   VCL_call       SYNTH
-   RespHeader     Content-Type: text/html; charset=utf-8
-   VCL_return     deliver
-   RespHeader     Content-Length: 602
-   Debug          "RES_MODE 2"
-   RespHeader     Connection: keep-alive
-   RespHeader     Accept-Ranges: bytes
-   Timestamp      Resp: 1406541624.863990 0.000220 0.000110
-   ReqAcct        212 0 212 204 602 806
-   End