FTP-AFTP Gateway Does Not Work with IIS 4.0 (185706)

SYMPTOMS

When you copy Ftpsvc2.dll from the Sna\System folder to the Windows\System32\Inetsrv folder and then starting the FTP service, the following errors will be reported.

A system error has occurred.

System error 127 has occurred.

The specific procedure could not be found.

CAUSE

There are two different Ftpsvc2.dll files, one for Internet Information Server (IIS) 2.0 and IIS 3.0, and the other for IIS 4.0. Using the IIS 2.0/3.0 Ftsvc2.dll with IIS 4.0 results in the error described above.

STATUS

Microsoft has confirmed this to be a problem in SNA Server version 4.0. This problem has been corrected in the latest U.S. Service Pack for SNA Server version 4.0. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

MORE INFORMATION

In order to use the FTP-AFTP Gateway with IIS 4.0, the IIS 4.0 version of ftpsvc2.dll has to be copied into the Windows\System32\Inetsrv directory. SNA Server 4.0 SP1 includes the correct ftpsvc2.dll for use with IIS 4.0 in the following directory:

\Server\i386\System\Gateway\IIS40

However, after applying the IIS 4.0 version of Ftpsvc2.dll, System Error 127 may continue to occur. If this occurs, the following files also need to be updated:

Infocomm.dll
W3svc.dll

The Ftpsvc2.dll included with SNA Server 4.0 SP1 has a version number of 4.02.0638. The other files listed should be at the same version as Ftpsvc2.dll.

These particular updates to IIS 4.0 are discussed in the following Knowledge Base article:

183283 Title: IE Through Proxy Server to IIS May Stop on Page with Scripts