How To Add Support for MSN Messenger Net2Phone in Internet Security and Acceleration Server 2000

Provide Support for Net2Phone

• Primary Connection:
  
  Port number: 1863
  Protocol type: TCP
  Direction: Outbound
• Secondary Connections:
  
  Port range: From 5004 to 65535
  Protocol type: UDP
  Direction: Send Receive
  
  Port range: From 6891 to 6900
  Protocol type: TCP
  Direction: Inbound
  
  Port range: From 6891 to 6900
  Protocol type: TCP
  Direction: Outbound
  
  Port range: From 6901 to 6901
  Protocol type: TCP
  Direction: Outbound

• MSN Messenger and Net2Phone
  
  Rule Applies to: Selected protocols
  Protocols: New MSN Messenger (where New MSN Messenger is the new custom MSN Messenger protocol that you created) and Net2Phone.
  Applies to: Any request
  

[msmsgs]
NameResolutionForLocalHost=E
RemoteBindUDPPorts=0,6901

Create a Protocol Definition

1. Start the ISA Management snap-in. To do this, click Start, point to Programs, point to Microsoft ISA Server, and then click ISA Management.
2. Locate the Protocol Definitions container under Policy Elements.
3. Right-click Protocol Definitions, point to New, and then click Definition.
4. In the Protocol definition name box, type a descriptive name for the definition (for example, type New MSN Messenger), and then click Next.
5. In the Port number box, type 1863, select the TCP option in the Protocol type list (if it is not already selected), select the Outbound option in the Direction list (if it is not already selected), and then click Next.
6. Under Do you want to use Secondary connections?, click Yes.
7. Click New, type 5004 in the From box, type 65535 in the To box, click UDP in the Protocol type list, click Send Receive in the Direction list, and then click OK.
   
   Note Make sure that you click Send Receive and not Receive Send in the Direction list.
8. Click New, type 6891 in the From box, type 6900 in the To box, click TCP in the Protocol type list, click Inbound in the Direction list, and then click OK.
9. Click New, type 6891 in the From box, type 6900 in the To box, click TCP in the Protocol type list, click Outbound in the Direction list, and then click OK.
10. Click New, type 6901 in the From box, type 6901 in the To box, click TCP in the Protocol type list, click Outbound in the Direction list, and then click OK.
11. Click Next, confirm your settings, and then click Finish.

Create a Protocol Rule

1. Start the ISA Management snap-in. To do this, click Start, point to Programs, point to Microsoft ISA Server, and then click ISA Management.
2. Locate the Protocol Rules container under Access Policy.
3. Right-click Protocol Rules, point to New, and then click Rule.
4. In the Protocol rule name box, type a name for the rule (for example, type MSN Messenger and Net2Phone), and then click Next.
5. Select the Allow option (if it is not already selected), and then click Next.
6. In the Apply this rule to list, click Selected protocols.
7. Click to select the following check boxes in the Protocols list:
   Net2Phone
   New MSN Messenger
   Where New MSN Messenger is the new custom MSN Messenger protocol that you previously created.
8. Click Next, click the schedule that you want to use when allowing this protocol, in the Use this schedule list (for example, click Always), and then click Next.
9. Under Apply the rule to requests from, select Any request (if it is not already selected), and then click Next.
10. Confirm the configuration selections, and then click Finish.

Edit the Firewall Client Configuration File

1. Open the Mspclnt.ini file by using a text editor such as Notepad. By default, this file is stored in the following location:
   C:\Program Files\Microsoft ISA Server\CLIENTS
2. Add the following section heading and information at the bottom of the file:
   [msmsgs]
   NameResolutionForLocalHost=E
   RemoteBindUDPPorts=0,6901
3. Save your changes to the file, and then close it.

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