When ISA has more than one IP address bound to the external interface, the source IP address for the FTP data connection may not be the primary IP address. Instead, the source IP address may be one of the secondary IP addresses bound to the external interface. With the hotfix installed, ISA always uses the primary IP address for both types of connections.
For additional information about how to obtain the latest ISA Server service pack, click the article number below to view the article in the Microsoft Knowledge Base:
How to Obtain the Latest Internet Security and Acceleration Server 2000 Service Pack
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.The English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
This fix also applies to the French, German, Spanish, and Japanese versions of ISA Server.
Date Time Version Size File name
02-Apr-2003 11:52 3.0.1200.260 19,216 Ftpfltr.dll
- Only bind one IP address to the external interface.
- Disable IP routing:
- In the ISA MMC, expand Servers and Arrays.
- Expand the server name node, and then expand Access Policy.
- Right-click IP Packet Filters, and then click Properties.
- Click the General tab, and then click to clear the Enable IP routing check box.
- Click OK to close the dialog box.
Article ID: 817829 - Last Review: Jun 5, 2008 - Revision: 1