TN3270/TN5250 Port Values Limited to Four Digits in SNA Manager (274179)


The information in this article applies to:

  • Microsoft Host Integration Server 2000
  • Microsoft SNA Server 3.0 SP1
  • Microsoft SNA Server 3.0 SP2
  • Microsoft SNA Server 3.0 SP3
  • Microsoft SNA Server 3.0 SP4
  • Microsoft SNA Server 4.0
  • Microsoft SNA Server 4.0 SP1
  • Microsoft SNA Server 4.0 SP2
  • Microsoft SNA Server 4.0 SP3
This article was previously published under Q274179

SYMPTOMS

TN3270 and TN5250 can be configured to use specific Transfer Control Protocol/Internet Protocol (TCP/IP) ports. However, the Edit Control where the specific port value is specified in SNA Manager allows a maximum of only four digits to be entered, even though the maximum TCP/IP port value is 65535.

CAUSE

The Edit Control incorrectly limits the port value to four digits.

RESOLUTION

SNA Server 4.0

To resolve this problem, obtain the latest service pack for SNA Server 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack

Host Integration Server 2000

To resolve this problem, obtain the latest service pack for Host Integration Server 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

328152 How to Obtain the Latest Host Integration Server 2000 Service Pack

WORKAROUND

The SNA Server command-line configuration utility (Snacfg.exe) can be used to enter TCP/IP ports values for TN3270 and TN5250 that contain five digits. The following is an example of how to set a port value of 12345 by using SNACFG for both TN3270 and TN5250:

TN3270

SNACFG tn3server <servername> /portnumber:12345

TN5250

SNACFG tn5server <servername> /portnumber:12345

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Host Integration Server 2000 Service Pack 1. This problem was first corrected in SNA Server 4.0 Service Pack 4.

MORE INFORMATION

Both TN3270 and TN5250 use TCP/IP port 23, by default. If both services will be used on the same SNA Server system, then one of them must be configured to use a different port. In addition, some customers may want to use nonstandard ports for TN3270 and TN5250 for security reasons.

The following explains how to specify the use of specific ports for TN3270 and TN5250 when using SNA Manager:
  1. Open SNA Manager (Snaexp.exe).
  2. Right-click TN3270 (or TN5250) in the left pane of the SNA Manager window.
  3. Click Properties.
  4. Click the Use option in the Port section of the TN3270 Properties (or TN5250 Properties) dialog box.
  5. Type in a specific port value.
Only four digits can be entered when you are specifying the port value in this manner. If SNACFG is used to specify the port as described previously, SNA Manager will correctly show the five-digit value in the port Edit Control.
Modification Type:MinorLast Reviewed:7/15/2004
Keywords:kbbug kbfix kbHostIntegServ2000preSP1fix kbHostIntegServ2000SP1fix kbSNA400PreSP4fix kbSNA400sp4fix KB274179
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