diff --git a/README b/README
index 7fdf3d7..bdb1e2b 100644
--- a/README
+++ b/README
@@ -17,7 +17,7 @@
 	If-Unmodified-Since, If-Modified-Since, Date, Accept-Encoding,
 	Accept-Language, Accept-Charset, Max-Forwards, If-Match,
 	If-None-Match, Last-Modified, Content-Length, Expires,
-	Content-Language, Content-Encoding, Allow
+	Content-Language, Content-Encoding, Allow, Host
 
 Report Bugs
 	Create a ticket on the issue tracking interface of GitHub:
diff --git a/ngx_http_header_inspect.c b/ngx_http_header_inspect.c
index 943750a..f977622 100644
--- a/ngx_http_header_inspect.c
+++ b/ngx_http_header_inspect.c
@@ -35,6 +35,7 @@
 static ngx_int_t ngx_header_inspect_digit_header(char* header, ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
 static ngx_int_t ngx_header_inspect_ifmatch_header(char* header, ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
 static ngx_int_t ngx_header_inspect_allow_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
+static ngx_int_t ngx_header_inspect_host_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
 static ngx_int_t ngx_header_inspect_ifrange_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
 static ngx_int_t ngx_header_inspect_date_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, char *header, ngx_str_t value);
 static ngx_int_t ngx_header_inspect_process_request(ngx_http_request_t *r);
@@ -1297,6 +1298,57 @@
 	return rc;
 }
 
+static ngx_int_t ngx_header_inspect_host_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value) {
+	u_char d = '\0';
+	ngx_uint_t i = 0;
+
+	if ( value.len == 0 ) {
+		return NGX_OK;
+	}
+
+	while ( i < value.len ) {
+		d = value.data[i];
+
+		if ( 
+			((d < '0') || (d > '9'))
+			&& ((d < 'a') || (d > 'z'))
+			&& ((d < 'A') || (d > 'Z'))
+			&& (d != '.') && (d != '-')
+			&& ((d != ':') || (i == 0))
+		) {
+			if ( conf->log ) {
+				ngx_log_error(NGX_LOG_ALERT, log, 0, "header_inspect: illegal char at position %d in Host header \"%s\"", i, value.data);
+			}
+			return NGX_ERROR;
+			break;
+		}
+		if ( d == ':' ) {
+			break;
+		}
+		i++;
+	}
+	if ( (d == ':') && (i+1 < value.len) ) {
+		i++;
+		for ( ; i < value.len ; i++ ) {
+			if ( (value.data[i] < '0') || (value.data[i] > '9') ) {
+				if ( conf->log ) {
+					ngx_log_error(NGX_LOG_ALERT, log, 0, "header_inspect: illegal char at position %d in Host header \"%s\"", i, value.data);
+				}
+				return NGX_ERROR;
+			}
+		}
+	}
+
+	if ( i != value.len ) {
+		if ( conf->log ) {
+			ngx_log_error(NGX_LOG_ALERT, log, 0, "header_inspect: unexpected end of Host header \"%s\"", value.data);
+		}
+		return NGX_ERROR;
+	}
+
+	return NGX_OK;
+}
+
 static ngx_int_t ngx_header_inspect_allow_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value) {
 	ngx_int_t rc = NGX_AGAIN;
 	ngx_uint_t i = 0;
@@ -1489,6 +1541,11 @@
 					if ((rc != NGX_OK) && conf->block) {
 						return NGX_HTTP_BAD_REQUEST;
 					}
+				} else if ((h[i].key.len == 4) && (ngx_strcmp("Host", h[i].key.data) == 0) ) {
+					rc = ngx_header_inspect_host_header(conf, r->connection->log, h[i].value);
+					if ((rc != NGX_OK) && conf->block) {
+						return NGX_HTTP_BAD_REQUEST;
+					}
 				} else {
 					/* TODO: support for other headers */
 					if (conf->log_uninspected) {