topic Re: How to filter audio and video streaming in PIX 515? in Network Security https://community.cisco.com/t5/network-security/how-to-filter-audio-and-video-streaming-in-pix-515/m-p/265311#M566604 <HTML><HEAD></HEAD><BODY><P>It may be possible, but you may find that you won't entirely block it. A user can configure real-time player to use http as the transport, so unless you block port 80, the audio stream can still get through.</P><P></P><P>I know at one time real player used one tcp port as a control port and the other ports were negotiated dynamically. I am not sure if this is still true, nor do I know how ms media player works. If a control port is used, it makes your job easier - just block access to the control port.</P><P></P><P></P><P>If you know that there are sites that offer streaming that you don't want your users to reach, you can try filtering by site, but it can lead to this: what if the same site (ip address) offers web and video services, and you want to reach the web service.</P><P></P><P>If I come across anything interesting, I'll forward them to you. Just let me know how.</P></BODY></HTML> Thu, 15 Apr 2004 14:06:58 GMT ehirsel 2004-04-15T14:06:58Z How to filter audio and video streaming in PIX 515? https://community.cisco.com/t5/network-security/how-to-filter-audio-and-video-streaming-in-pix-515/m-p/265310#M566603 <P>How to filter audio and video streaming in PIX 515? Is that possible filter it by port blocking?</P> Fri, 21 Feb 2020 07:20:50 GMT https://community.cisco.com/t5/network-security/how-to-filter-audio-and-video-streaming-in-pix-515/m-p/265310#M566603 lehpoh 2020-02-21T07:20:50Z Re: How to filter audio and video streaming in PIX 515? https://community.cisco.com/t5/network-security/how-to-filter-audio-and-video-streaming-in-pix-515/m-p/265311#M566604 <HTML><HEAD></HEAD><BODY><P>It may be possible, but you may find that you won't entirely block it. A user can configure real-time player to use http as the transport, so unless you block port 80, the audio stream can still get through.</P><P></P><P>I know at one time real player used one tcp port as a control port and the other ports were negotiated dynamically. I am not sure if this is still true, nor do I know how ms media player works. If a control port is used, it makes your job easier - just block access to the control port.</P><P></P><P></P><P>If you know that there are sites that offer streaming that you don't want your users to reach, you can try filtering by site, but it can lead to this: what if the same site (ip address) offers web and video services, and you want to reach the web service.</P><P></P><P>If I come across anything interesting, I'll forward them to you. Just let me know how.</P></BODY></HTML> Thu, 15 Apr 2004 14:06:58 GMT https://community.cisco.com/t5/network-security/how-to-filter-audio-and-video-streaming-in-pix-515/m-p/265311#M566604 ehirsel 2004-04-15T14:06:58Z Re: How to filter audio and video streaming in PIX 515? https://community.cisco.com/t5/network-security/how-to-filter-audio-and-video-streaming-in-pix-515/m-p/265312#M566606 <HTML><HEAD></HEAD><BODY><P>Were you able to solve your problem or do you need more help?</P><P></P></BODY></HTML> Fri, 07 May 2004 13:25:12 GMT https://community.cisco.com/t5/network-security/how-to-filter-audio-and-video-streaming-in-pix-515/m-p/265312#M566606 ehirsel 2004-05-07T13:25:12Z