varnish 1.3.x for django bypassing cache on admin

default.vcl

backend default {
    .host = "127.0.0.1";
    .port = "81";
}

sub vcl_recv {
        # if find purge in the url  go there and purge
        if( req.url ~ "purge" ) {
            return (lookup);
        }

        #remove from the url
      set req.url = regsuball(req.url,"\?gclid=[^&]+$",""); # strips when QS = "?gclid=AAA"
      set req.url = regsuball(req.url,"\?gclid=[^&]+&","?"); # strips when QS = "?gclid=AAA&foo=bar"
      set req.url = regsuball(req.url,"&gclid=[^&]+",""); # strips when QS = "?foo=bar&gclid=AAA" or QS = "?foo=bar&gclid=AAA&bar=baz"

    if (  req.url ~ "admin" ) {
        return (pass);
    } else {
       remove req.http.cookie;
       unset req.http.cookie;
    }
}
sub vcl_deliver {
        #checking if is hit or not
        if (obj.hits > 0) {
            set resp.http.X-Cache-Hits = obj.hits;
            set resp.http.X-Cache = "HIT";
        } else {
           set resp.http.X-Cache = "MISS";
        }
}

sub vcl_fetch {
    # it is django admin not cache
    if (req.url ~ "admin") {
        set beresp.http.X-Cacheable = "NO: admin yeah!";
        return(hit_for_pass);
    }


    # Varnish determined the object was not cacheable
    if (beresp.ttl <= 0s) {
        set beresp.http.X-Cacheable = "NO:Not Cacheable";
    # You don't wish to cache content for logged in users
    } elsif (req.url ~ "admin") {
        set beresp.http.X-Cacheable = "NO: admin";
        return(hit_for_pass);
    
    # You are respecting the Cache-Control=private header from the backend
    } elsif (beresp.http.Cache-Control ~ "private") {
        set beresp.http.X-Cacheable = "NO:Cache-Control=private";
        return(hit_for_pass);
    
    # Varnish determined the object was cacheable
    } else {
        set beresp.http.X-Cacheable = "YES";
    }
    return(deliver);
}



sub vcl_miss {
    if( req.url ~ "purge" ) {
            purge;
            error 200 "MISS:Cleaning cache and varnish purge, mensaje auto generado";
        }
}

sub vcl_hit {
    if( req.url ~ "purge" ) {
            purge;
            error 200 "HIT:Cleaning cache and varnish purge, mensaje auto generado";
        }
}