Windows 3.x Client Problem Connecting over Netmanage Newt TCP/IP

• Microsoft SNA Server for Windows NT, versions 2.11 (all SP), 3.0 (all SP)

SYMPTOMS

When you configure the SNA Server Windows 3.x client software with two firewall addresses, the SNA client is unable to connect through the second firewall server if the SNA Server computer associated with the first firewall server is unavailable. This problem occurs when the SNA Server Windows 3.x client is communicating over the TCP/IP Windows sockets interface provided by Netmanage Newt version 4.6 or 4.65. This problem does not occur when you are using the Microsoft TCP32 protocol and Windows sockets interface.

SNA Server client support for connectivity across Internet firewalls is described in the following Microsoft Knowledge Base article:

Q139508 Internet Firewall Support in SNA Server

• If the first SNA Server computer (associated with the first firewall address) is not connected to the network, then the SNA Windows 3.x client receives error 10060 (WSAETIMEDOUT), as expected, when connecting to the SnaBase socket 1478. But when the SNA client attempts to connect to the second SNA Server computer (associated with the second firewall address), you still receive error 10060, even though a network trace (such as Microsoft Network Monitor) indicates that the TCP/IP syn/syn/ack connection succeeded to socket 1478 on the second server.



• If both SNA Server computers are connected to the network, but the SNA Server service is not running on the first server, then the SNA client's attempt to open a connection to socket 1477 on the second server fails with socket error 10009 (WSAEBADF). The connection attempt to the first SNA Server computer fails as expected with error 10061 (WSAECONNREFUSED), because the SNA Server service was not started on the first SNA Server computer.

RESOLUTION

At the time this article was written, there was no solution for this problem available from Netmanage. This problem does not occur when you are using the SNA Server Windows 3.x client software over the Microsoft TCP32 protocol stack.

STATUS

The Netmanage Newt products discussed here are manufactured by a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Additional query words: chameleon

Keywords : prodsna sna3rdparty snawin3x snabaseservice
Version : winnt:2.11 (all SP),3.0 (all SP)
Platform : winnt
Issue type : kbprb