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2423054 - Message Server ACL file: ERROR => HOST invalid argument

Symptom

An extra security layer is being implemented by explicitly informing the client hosts which are allowed to logon to the message server.
The required configuration is performed according to SAP Help Portal - Security Settings for the SAP Message Server
At the end, the configuration seems not to work as expected and previously allowed hosts are being denied from access.

In the message server trace file (dev_ms), the following entries can be seen:

[Thr <nr] load acl file = /usr/sap/<SID>/SYS/global/ms_acl_info
[Thr <nr] *** ERROR => HOST invalid argument (<nr>.<nr>.<nr>.*) in line 10 [msxxacl.c 774]       
[Thr <nr] *** WARNING => Errors found in /usr/sap/<SID>/SYS/global/ms_acl_info
[Thr <nr] *** WARNING => Please correct the invalid entry

Or

Thr  <nr> load acl file = D:\usr\sap\<SID>\SYS\global\ms_acl_info.DAT
[Thr <nr] ***LOG Q0I=> NiPGetHostByName: '<hostname>' not found: getaddrinfo [D:/depot/bas/742_REL/src/base/ni/ninti.c 896]
[Thr <nr] NiHLGetNodeAddr: hostname '<hostname>' not found by operating system
[Thr <nr] *** ERROR => HOST invalid argument (<instance name>) in line 10 (NIEHOST_UNKNOWN) [msxxacl.c 809]


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Environment

  • Message server security
  • Configuring additional security layer
  • Access Control List settings
  • Operating System independent
  • Database independent
  • SAP NetWeaver
  • SAP Web Application Server for SAP S/4HANA
  • ABAP Platform

Product

ABAP platform all versions ; SAP NetWeaver all versions ; SAP Web Application Server for SAP S/4HANA all versions

Keywords

MSEACCESSDENIED, host denied, dev_ms, /usr/sap/<SID>/SYS/global/ms_acl_info, HOST invalid argument, Errors found in /usr/sap/<SID>/SYS/global/ms_acl_info, NiPGetHostByName, NiHLGetNodeAddr, NIEHOST_UNKNOWN, wild card character, invalidated, /etc/hosts, host name, HOST , KBA , BC-CST-MS , Message Service , Problem

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