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How do I enable NNTP/POP/SMTP for the Internet Security and Acceleration (ISA) Server?
John Savill
October 22, 2000
1 Min Read
A. To enable clients to access news servers (Network News Transfer Protocol--NNTP), POP3, and SMTP, you need to create custom filters with the following details:
NNTP--Custom, Both, Local Fixed Port 119, Remote Fixed Port 119
POP3--Custom, Both, Local Fixed Port 110, Remote Fixed Port 110
SMTP--Custom, Both, Local Fixed Port 25, Remote Fixed Port 25
For example, to create an NNTP filter, perform the following steps:
Start the ISA Server administration tool (Start, Programs, Microsoft ISA Server, ISA Administration Tool).
Expand Array, Server, Access Policy, IP Packet Filters.
Click Create Packet Filter.
Enter a packet filter name (e.g., NNTP Filter), and click Next.
Select the server, and click Next.
Select "Allow packet transmission," and click Next.
Select a type of Custom, and click Next.
Select
IP protocol--TCP
Direction--Both
Local fixed port--119
Remote fixed port--119
Click Next.
Select the IP address to apply the filter to, and click Next.
Select "All remote computers" for "IP packet filter to apply to," and click Next.
Click Finish.
The above method is manually creating an IP packet filter to cater for theprotocols however ISA can also dynamically create these if you instead create aProtocol Rule:
Start the Internet Security and Acceleration Server administration tool (Start - Programs - Microsoft ISA Server - ISA Administration Tool)
Expand the Array - Server - Access Policy - Protocol Rules
Create a new protocol rule or open an existing one
Select the Protocol tab
Select the SMTP (client), NNTP and POP3 protocols
Click OK
This would be the preferred method and is easier. Ifyou’re running one of those services directly on your ISA server, then IPPacket Filters may have to be defined.
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