Re: APPC - TCPIP...Book 2

[Philipp Rusch <Philipp.Rusch@xxxxxxxxxxxx>]

Hello Chris,

who ever told you about UPPER CASES:

this may have been true for ancient TCPIP on V3R7 or so, but for the
TCPIP stack V4Rx or V5R1 this is definitely not true .
I've done this a several times with newer releases and there is no distinction
between upper and lower case hostnames. This would be very unnormal
behaviour compared to the rest of the IP-world, no DNS Server I know
of would make a difference between WWW.IBM.COM or www.ibm.com.
(There are cases where this IS the case, for instance the SAP-GUI client
used to install the new SAP releases, I think its v4r6 or so, makes such a
difference, this is very funny when installing two- or three-tier-systems ...)
Back to the topic: in newer releases of OS/400 you can even get rid of
the suffix SNA.IBM.COM if this is of any problem for you, but I do not have
the Info APAR number at hand at the moment.

Regards, Philipp Rusch

Chris Bipes schrieb:

> With TCP/IP you are always active but may not be able to reach the remote
> location.  Basically when the TCP/IP program start to listen at port 397,
> YES it MUST be opened through your firewall, the controllers become active.
> Each system will try to connect to the remote system that is listening at
> port 397.
>
> First NETSTAT *CNN and look for:
>
>      Remote           Remote     Local
> Opt  Address          Port       Port       Idle Time  State
>      *                *          APPCove >  406:54:06  Listen
>      *                *          APPCove >  263:53:08  *UDP
>
> and if you hit F14:
>
>      Remote           Remote  Local
> Opt  Address           Port    Port  Idle Time  State
>      *                     *    397  406:54:06  Listen
>      *                     *    397  263:53:08  *UDP
>
> That means that your AS400 is configured correctly for *ANYNW.  The
> remainder is getting the correct Host name resolution in DNS or Host table.
> Ahh!  I mention earlier to add the host tables:HOST.SNA.APPN.IBM.COM.  Did I
> mention that it must be all UPPER CASE!  Now on the CFGTCPDMN make sure you
> are checking your local host table before going out to your DNS server(s).
>
> Now who ever told you that you do not need additional ports opened in the
> firewall is talking out of there BUTT!  You MUST open 397 at BOTH ends.
>
> Christopher K. Bipes      mailto:ChrisB@Cross-Check.com
> Operations & Network Mgr  mailto:Chris_Bipes@Yahoo.com
> CrossCheck, Inc.                  http://www.cross-check.com
> 6119 State Farm Drive     Phone: 707 586-0551 x 1102
> Rohnert Park CA  94928    Fax: 707 586-1884
>
> -----Original Message-----
> From: Rick Rayburn [mailto:the400man@hotmail.com]
> Sent: Wednesday, December 05, 2001 5:10 AM
> To: midrange-l@midrange.com
> Subject: APPC - TCPIP...Book 2
>
> Thanks to all who provided information yesterday on establishing APPC -
> TCPIP communications between 2 400's. We are still having a problem
> completing the connection as the controllers and devices on both machines
> are, indeed, active but both passthru and SNADS object transfers are
> failing. When trying to SNADS, the status of the job goes into a "connect"
> condition but then soon fails with a "failure to connect to remote" message,
> or something like that. Passthru has a similiar response (I think it is code
> '0009'). Here is a quick review which I hope can provide some peek at where
> we might have erred:
>
> ?? Firewall. We have been told that 400 to 400 communication does NOT need
> any additional ports "opened" (are they already or auto opened?) for
> *anynet. Some have written to say ports 397 and 9216 must be opened. Our
> communcation contacts say not true. Word?
>
> SUMMARY. Based on the information above, does anyone have an idea why the
> controllers and devices are ACTIVE without passthru and SNADS
> co-operating?
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