IBM Support

SI69106 - OSP-INCORROUT Allow IBM i NetServer to start without NetBIOS

PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

OSP-INCORROUT Allow IBM i NetServer to start without NetBIOS


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
NONE



NOTICE:
-------
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APAR Error Description / Circumvention

-------------------------------------------------
IBM i NetServer requires NetBIOS support for the server to
start.  NetBIOS is often flagged as a security vulnerability in
network security scans.  If the user blocks NetBIOS ports
137-139 with port restrictions, NetServer will not start.

CORRECTION FOR APAR 'SE70621' :
-------------------------------
IBM i NetServer has been updated to allow the server to start
when ports 137-139 are blocked with port restrictions.
NetServer will send a warning message to the QSYSOPR message
queue to indicate that NetBIOS services are not available, but
the server job will start and accept TCP connections on port
445.

The IBM i NetClient file system (QNTC) relies on NetBIOS
services to auto-populate the /QNTC path with servers.  Server
names will not be automatically added to the /QNTC path if the
NetBIOS ports are restricted.  Servers can be added to the /QNTC
path manually with the Create Directory (MKDIR) command after
each system IPL.  For example, MKDIR DIR('/QNTC/MyServer').

It is recommended that NetServer browse announcement support is
disabled when NetBIOS is blocked to prevent periodic LIC log
entries related to browse announcements.

CIRCUMVENTION FOR APAR 'SE70621' :
----------------------------------
None.


Activation Instructions

None.




Special Instructions

ENDTCPSVR *NETSVR before applying or removing the PTF.
STRTCPSVR *NETSVR after applying or removing the PTF.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   SI57748      IPL-MSGCPIB683 IBM i NETSERVER FAILS TO START WITH MSGCPIB68

Summary Information

System.............................. i
Models..............................
Release............................. V7R2M0
Licensed Program............... 5770SS1
APAR Fixed.......................... View details for APAR SE70621
Superseded by:......................
Recompile........................... N
Library............................. QSYS
MRI Feature ........................ NONE
Cum Level........................... C9123720


System i Support

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Document information

More support for: i family

Software version: V7R2M0

Operating system(s): OS/400

Reference #: SI69106

Modified date: 08 March 2019