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IBM Z Hardware and Operating Systems Ideas Portal


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Communications Server

Showing 524

DupAck - Input and Output Out-of-order packets

It was noticed an abnormal ammount of "Dup acks" in TCP connections. Since the two end points of those connections are inside a datacenter (no external links) it usually means there are lost packets.Some traces (SYSTCPDA and SYSTCPOT) were capture...
almost 5 years ago in z/OS / Communications Server 1 Not under consideration

z/OS FTP PROXY OPEN support over TLS

We've recently started to enforce TLS encryption for z/OS FTP connections. Some of our jobs use the FTP "proxy" command to request that a dataset be transferred from one z/OS FTP server to another z/OS FTP server. However, when this is done after ...
3 months ago in z/OS / Communications Server 0 Future consideration

CSSMTP needs to redrive DNS lookup other than at startup

Current CSSMTP functionality only resolves DNS names to IP addresses on product startup. PMRs and questions have led to responses that indicate the implementation ignores the DNS time to live (TTL) parameters and, quoting from the PMR, "... elimin...
almost 7 years ago in z/OS / Communications Server 0 Future consideration

TCPIP Sysplex Autonomics with CSM constrain

VTAM CSM FIXED Storage arise 80% CONSTRAIN situation due to a high demand of TCP workload with 4 OSA 10 Gb interfaces. But returns to a level under 80% immediately. This situation repeats more than 1000 times in 2 hours.TCPIP Sysplex Autonomics do...
over 3 years ago in z/OS / Communications Server 2 Not under consideration

TCP/IP leaves the group EZBTCPCS with the message *EZZ9676E and It is not able to rejoin it again.

After a lack of ECSA in a member of a 4-way sysplex, TCP/IP leaves it with the message *EZZ9676E and It is not able to rejoin the XCF group again.Even when we have GLOBALCONFIG SYSPLEXMONITOR AUTOREJOIN options active and the problem that caused t...
about 10 years ago in z/OS / Communications Server 13 Not under consideration

zERT - Simple data import

With the current import UI for zERT one must specify all possible Datasets manually. If you have many Datasets it is very cumbersome to add all of them. Allow generic naming's to import for example.
about 5 years ago in z/OS / Communications Server 4 Future consideration

VTAM Connection Network Pending PU Processing

When a Connection Network PU goes into a pending state during connection establishment, VTAM does not perform any INOP Processing as it does for native Enterprise Extender connections. The pending PU remains in the pending state for an indefinite ...
about 4 years ago in z/OS / Communications Server 1 Not under consideration

CSSMTP Suppport for SASL Methods PLAIN and KERBEROS

CSSMTP Suppport for SASL Methods PLAIN and KERBEROS. Our Security Department requires any Mail Sender to identify itself via 'Simple Authentication and Security Layer' (SASL). Three SASL Methods would fulfill that requirement: a) Method PLAIN. A M...
about 12 years ago in z/OS / Communications Server 2 Future consideration

Add DTLS Support for Enterprise Extender

We would like to see if DTLS could be added in Enterprise Extender so we could use SSL with UDP.
over 10 years ago in z/OS / Communications Server 3 Not under consideration

Send TCP/IP reply traffic over the same interface

Provide a way to force the TCP/IP Stack to send reply traffic over the same interface that the request came in on.
almost 6 years ago in z/OS / Communications Server 1 Not under consideration