Christian TCP 1720 is used for H.323 call signaling and is only used during a video conferencing call. The device maybe using port 1720 but it may not be video conferencing related unless there is a video conferencing device behind the router connect to a device outside the router and you certainly cannot configure the router on that port. Simon From: h323plus-bounces@lists.packetizer.com [mailto:h323plus-bounces@lists.packetizer.com] On Behalf Of Braun, Christian Sent: Friday, January 07, 2011 11:49 PM To: h323plus@lists.packetizer.com Subject: [h323plus] Possible Entry through h.323 at Port 1720 Hello everybody, I am new to this list and have just a simple question: We are using an Sierre Wireless Raven XT router to send data from a remote place to our servers And at the moment the connection is not fully established (we cannot connect with Loggernet Campbell Scientic Program). A port scan from the machine gives: PORT STATE SERVICE 1720/tcp open H.323/Q.931 Which is the only open port (no SSH, no HTML Port). Is there a possibility to get through this port to change the configuration of the router? Any help would be appreciated. Best regards, Christian Braun Christian Braun | System Development Concentrix Solar GmbH | Bötzinger Str. 31 | 79111 Freiburg | Germany T +49 761 214 108 35 | F +49 761 214 108 29 | M +49 1522 273 66 35 christian.braun@concentrix-solar.de <mailto:christian.braun@concentrix-solar.de> | www.concentrix-solar.de <http://www.concentrix-solar.de/> Managing Directors: Hansjörg Lerchenmüller, Emmanuel Arène | Chairman of the Board: Dr. André-Jacques Auberton-Hervé HRB 7492 Register Court Freiburg | Disclaimer: www.concentrix-solar.de/disclaimer Concentrix Solar is a division of the Soitec Group: www.soitec.com <http://www.soitec.com/>