Windows Media player benytter sig at UDP protokollen, som bruges til forskellige typer download.. blandt andet live stream.. Du kan vælge at lukke helt af for UDP, men så kan du heller ikke bruge F.eks Realplayer..
Men hvis det ikke betyder noget for dig, kan du under punktet Access Policy.. Finde et punkt som hedder Ip packet filter
Højre klik i det tomme vindue ( kun tom hvis du i forvejen ikke hat nogle pakke filtre defineret.. Vælg ny/new - packet filter-- Og følg guiden
Jeg håber det kan hjælpe dig.. Hvis ikke så lav et indlæg mere og forklar lidt mere om, hvad problemet er.. F.eks at dine medarbejdere sidder på Dr ´s netradio og du ikke vil bruge/betale for den båndbredde det koster..
Jeg har fundet hvordan man åbner en ISA server til at kunne bruge online radio.. DU SKAL BARE GØRE DET OMVENDTE!!
Setting Firewall Configuration
Posted: August 6, 1999
If you have problems delivering or receiving Windows Media streams, you may need to open additional ports in your firewall. This document briefly explains firewalls, describes how Windows Media interacts with firewalls, and offers suggested firewall settings.
General Protocol and Firewall Information A firewall is a piece of hardware or software that prevents data packets from either entering or leaving a specified network. To control the flow of traffic, numbered ports in the firewall are either opened or closed to types of packets. The firewall looks at two pieces of information in each arriving or departing packet: the protocol through which the packet is being delivered, and the port number to which it is being sent. If the firewall is configured to accept the specified protocol through the targeted port, the packet is allowed through.
Windows Media and Firewalls Because Windows Media does not use any of the standard or "well-known" ports that would be open by default (except HTTP), you must open special ports. Windows Media Technologies was formerly known as NetShow; many firewalls have a NetShow port setting that can also be used for Windows Media.
When you allocate ports for Windows Media files, you must open all of the UDP and TCP ports corresponding to those port numbers. The number ranges in the documentation below indicate an entire range of available ports; typically, the actual number of ports allocated will be far less.
When deciding how many ports to open, balance security with accessibility by opening just enough ports to allow all clients to make a connection. However, port range restrictions potentially affect all remote procedure call (RPC) and Distributed Componenent Object Model (DCOM) applications sharing the system, not just Windows Media. If the port range is not broad enough, competing services such as Internet Information Server (IIS) will start to fail with random errors. The port range must be able to accomodate all potential applications in the system that will use RPC/COM/DCOM services. The number of open ports is entirely up to the individual corporate security philosophy, but as a starting point, determine how many ports you expect to use for Windows Media, then open 10% more to account for overlap with other programs. Once you've established this number, watch your traffic to determine if adjustments are necessary.
Firewall and Registry Settings for DCOM DCOM dynamically allocates one port per process. You need to decide how many ports you want to allocate to DCOM processes, which is equivalent to the number of simultaneous DCOM processes through the firewall. You must open all of the UDP and TCP ports corresponding to the port numbers you choose. You also need to open TCP/UDP 135, which is used for RPC End Point Mapping, among other things. In addition, you must edit the registry to tell DCOM which ports you reserved. You do this with the "HKEY_LOCAL_MACHINES \Software \Microsoft \Rpc \Internet" registry key, which you will probably have to create.
The following example tells DCOM to restrict its port range to 10 ports:
Named Value: Ports Type: REG_MULTI_SZ Setting: Range of port. Can be multiple lines such as: 3001-3010 135
Named Value: PortsInternetAvailable Type: REG_SZ Setting:"Y"
Named Value: UseInternetPorts Type: REG_SZ Setting: "Y"
These registry settings must be established in addition to all firewall settings listed below.
Firewall Settings for Windows Media There are five primary scenarios to consider when setting up a firewall to accomodate Windows Media:
Using Windows Media Player behind a firewall to access content outside the firewall Using Windows Media Player outside a firewall to access content on a Windows Media server behind a firewall Using Windows Media Encoder outside a firewall to access a Windows Media server behind the firewall, or communicating between two servers across a firewall Using Windows Media Administrator outside a firewall to manage a Windows Media server behind a firewall IP Multicast In the examples below, the In port is the port that the server uses to get past the firewall. The Out port is the port that Microsoft Windows Media Player or other clients use to communicate with the server.
Server to Client Behind a Firewall A firewall configuration that allows users with the Windows Media Player behind a firewall to access Windows Media servers outside the firewall is:
Streaming ASF with UDP Out: TCP on 1755 Out: UDP on 1755 In: UDP between port 1024-5000 (Only open the necessary number of ports.) Streaming ASF with TCP In/Out: TCP on port 1755 Streaming ASF with HTTP In/Out: TCP on Port 80 Server Behind a Firewall to Client The following firewall configuration allows users with the Windows Media Player outside of a firewall to access a Windows Media server behind a firewall:
Streaming ASF with UDP In: TCP on port 1755 In: UDP on port 1755 Out: UDP between port 1024-5000 (Only open the necessary number of ports.) Streaming ASF with TCP In/Out: TCP on port 1755 Streaming ASF with HTTP In/Out: TCP on Port 80 Protocol: MSBD In/Out: TCP on port 7007 For Server to Encoder communication, you can specify a different port. The default port is 7007, but in the Windows Media Encoder Output dialog box you can choose any other free port; you can also push a button to allow the Encoder to select a different port. If you choose a different port, you must specify the same port in the server when you set up the station. Encoder to Server Behind a Firewall/Server to Server Across a Firewall The following firewall configuration allows users with the Windows Media Encoder outside of a firewall to access a Windows Media server behind a firewall:
Protocol: MSBD In/Out: TCP on port 7007. For encoder-to-server communication, you can specify a different port. The default port is 7007, but in the Windows Media Encoder Output dialog box you can choose any other free port; you can also push a button to allow the encoder to select a different port. If you choose a different port, you must specify the same port in the server when you set up the station. Administrator to Server Behind a Firewall The following firewall configuration allows users with the Windows Media Administrator outside of a firewall to access a Windows Media server behind a firewall:
Protocol: HTTP In/Out: TCP on port 80 Protocol: DCOM In: TCP on port 135 You must open TCP and UDP on port 135. This port is used for initial Windows Media server-to-client and server-to-encoder communications, as well as essential processes. The protocol used for these initial communications is DCOM. IP Multicast The following firewall configuration enables IP Multicasting:
Streaming ASF with Multicast IP Multicast Address range: 224.0.0.1 to 239.255.255.255 To enable IP Multicasting you must allow packets sent to the standard IP Multicast address range above to come through your firewall. This IP Multicast address range must be enabled on both client and server sides, as well as every router in between.
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