SUBSCRIBE /upnp/WANCommonInterfaceConfig?dev=1 HTTP/1.1 SID: uuid:XSID-0013a35da7dc-536b56fd Timeout: Second-1800 User-Agent: Mozilla/4.0 (compatible; UPnP/1.0; Windows 9x) Host: 10.0.0.138 Content-Length: 0 Connection: Keep-Alive Cache-Control: no-cache Pragma: no-cache