System configuration file changes

Last Updated : Sep 24, 2026 |
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Communication Manager software only installer makes modification to the system configuration files. Change methods are as follows:
  • Delta: Added to the existing file.
  • Replace: Old file is replaced with a new file.
  • User choice: Customer can choose for them or Avaya application to own.
The following table lists the files that are modified along with the reason for modification:
File
Change method (Delta | Replace | User choice)
Reason for change
Can be edited afterwards by customer ?
File can change in service packs and feature packs
Comments
/etc/passwd
/etc/group
/etc/shadow
/etc/gshadow
Delta
Add users and groups required by Communication Manager. Remove groups that are not required.
Yes
No
The SMI Web page Administrator Accounts allows the user to create or remove Communication Manager administrators. Communication Manager also creates Services accounts.
/etc/snmp/snmpd.conf
/var/lib/net-snmp/snmpd.conf
/etc/snmp/snmptrapd.conf
/var/lib/net-snmp/snmptrapd.conf
Delta
Administer SNMP communities (v1/v2c) and users (v3).
Administer SNMP incoming traps.
Yes
No
The SMI Web interface allows the user to create or remove SNMP users. Also, allow configuration of the trap receiver, fault, and performance filters.
/etc/hosts
Delta
Entries are added for current host and duplicated server
Yes
No
The SMI Web interface allows configuration of host names.
/etc/hostname
Replace
Update hostname with the value configured during install.
Yes
No
The SMI Web interface allows configuration of host names.
/etc/aliases
Delta
Remove decode alias.
Yes
No
Security vulnerability.
/etc/sysconfig/network-scripts/route-eth<n>
Delta
Configuration of static routes.
Yes
No
The SMI Web page Static Routes allows configuration of static routes.
/etc/sysconfig/network-scripts/ifcfg-eth<0-2>
Delta
Configuration of the Ethernet interfaces IP addresses.
No
No
The SMI Web interface allows configuration of IP addresses. The files should not be changed.
/etc/chrony.conf
Replace
Configuration of NTP servers.
Yes
No
The SMI Web interface allows configuration of NTP servers.
/etc/systemd/system/multi-user.target.wants/chronyd.service remove /etc/ntp/drift
Replace
Enable NTP.
No
Yes
Enable NTP service.
/etc/resolv.conf
Delta
Configure DNS and domain.
Yes
No
The SMI Web page Network Configuration and installation choices allows configuration of DNS, domain, search domain.
/etc/syconfig/network
Delta
Configure hostname and default gateways.
Yes
No
The SMI Web page Login Account Policy allows configuration of Web and CLI inactivity timeouts.
/etc/profile.d/umask.sh
Replace
Comments only. No operating system changes.
No
No
The file is for documentation purposes only.
/etc/login.defs
Delta
Updates UID_MIN to 1000, to keep Communication Manager logins separate. Updates the password aging control.
Set password expiration and lockout periods.
Yes
No
The SMI Web page Login Account Policy allows configuring the 'Credential Expiration parameters'.
/etc/security/limits.conf
/etc/security/pwquality.conf
Replace
Configure max number of logins and user's password complexity.
Yes
See Note
No
The SMI Web page Login Account Policy allows configuration of password complexity.
Note:
After installation, set the entry 'CustomPamFiles enabled' in /etc/ecs.conf, if custom changes to PAM files are desired.
/etc/localtime
/etc/sysconfig/clock
Replace
Configure the time zone.
Yes
No
The SMI Web page Time Zone configuration allows configuration of the time zone.
/etc/pam.d/mv-auth
/etc/pam.d/crond
/etc/pam.d/cm
/etc/pam.d/smi_web
/etc/pam.d/hp-sshd
Replace
Set authorization and account policies for SSH and Web access.
Yes
See Note
No
Note:
After installation set the entry 'CustomPamFiles enabled' in /etc/ecs.conf, if custom changes to PAM files are desired.
/etc/pam.d/atd
/etc/pam.d/chfn
/etc/pam.d/chsh
/etc/pam.d/config-util
/etc/pam.d/crond
/etc/pam.d/login
/etc/pam.d/passwd
/etc/pam.d/polkit-1
/etc/pam.d/ppp
/etc/pam.d/remote
/etc/pam.d/screen
/etc/pam.d/smtp
/etc/pam.d/smtp.postfix
/etc/pam.d/sshd
/etc/pam.d/su
/etc/pam.d/sudo
/etc/pam.d/systemd-user
/etc/pam.d/vlock
Delta
Set authorization and account policies for SSH and Web access. use Communication Manager PAM stack.
Yes
See Note
No
Note:
After installation set the entry 'CustomPamFiles enabled' in /etc/ecs.conf, if custom changes to PAM files are desired.
/etc/ssh/sshd_config
/etc/ssh/hp-sshd_config
/etc/ssh/ssh_config
Replace
Configure SSH access to bash and SAT.
Yes
See Note
No
Note:
After installation set the entry 'CustomSSHFiles enabled' in /etc/ecs.conf, if custom changes to SSH files are desired.
/etc/shells
Delta
Add shells: 'nologin', 'eula_shell', and 'ppp-login'.
Yes
No
Required by Communication Manager.
/etc/nsswitch.conf
Replace
Configure LDAP access.
Yes
See Note
No
Note:
After installation set the entry 'CustomLDAPFiles enabled' in /etc/ecs.conf, if custom changes to LDAP are desired.
/etc/rc.d/init.d/*
Replace
Communication Manager adds initialization scripts.
No
Yes
These are the initialization scripts required for Communication Manager to start after a reboot
/etc/rc.modules
Replace
Make sure upper level SCSI and software watchdog are present.
Yes
Yes
/etc/sysconfig/iptables
/etc/sysconfig/ip6tables
Replace
Configure firewall for all Communication Manager connections.
Yes
See Note
No
Note:
After installation set the entry 'CustomFirewall enabled' in /etc/ecs.conf, if custom changes to Firewall are desired.
/etc/rsyncd.conf
Replace
Required for synchronization of Communication Manager configuration files.
No
Yes
/etc/at.deny
/etc/cron.deny
/etc/cron.allow
Delta
Remove 'at' and 'cron' capability for some service logins.
Only root is allowed to run cron.
Yes
No
Security related change.
/etc/ld.so.conf
Delta
Add paths to Communication Manager libraries.
Yes
No
/etc/issue
/etc/issue.avaya
Replace
Add default Communication Manager login banner.
Yes
No
/etc/syslog.conf
/etc/sysconfig/rsyslog
Replace
Syslog configuration.
Yes
Yes
The SMI Web page Syslog Server allows configuration of syslog.
/etc/selinux/config
Delta
Disable SELinux.
Yes
See Note
No
Note:
Communication Manager provides a script to enable SELinux and auditd with safe settings: setCMSelinux [-f] <disabled | permissive | enforcing>. Note that enabling this will cause a small performance loss.
/etc/audit/auditd.conf
/etc/audit/rules.d/audit.rules
Replace
Configure operating system level auditing. Disabled by default.
Yes
See Note
Yes
Note:
Communication Manager provides a script to enable auditd: setCMAuditd [ -f] <enabled | disabled>. Note that enabling this will cause a small performance loss.
/etc/services
Replace
Older version of the file with added Communication Manager services (SAT, H.248, messaging).
Yes
Yes
/etc/logrotate.conf
/etc/logrotate.d/chistory
/etc/logrotate.d/httpd
/etc/logrotate.d/krm_rotate
/etc/logrotate.d/syslog
/etc/logrotate.d/syslog_rotate
/etc/logrotate.d/avaya.logrotate
Replace
Configure a log rotation period and disk usage.
Yes
Yes
Changes may be lost after a Communication Manager update. Some files are for Communication Manager specific logs only.
/etc/nscd.conf
Replace
Configure Name Services cache by removing caching of hosts.
Yes
Yes
/etc/sysctl.conf
/etc/sysctl.d/99-sysctl.conf
Replace
Customized operating system and networking parameters.
Yes
Yes
Should not be changed.
/etc/httpd/conf/httpd.conf
/etc/httpd/conf.d/ssl.conf
Delta
Configure the Apache HTTP service for SMI Web interface.
No
Yes
Communication Manager requires control of the httpd configuration for the SMI Web interface. Communication Manager also adds configuration files in the same /etc/httpd/conf.d directory.
/etc/ppp/options
/etc/ppp/ip-up.local
/etc/ppp/ip-down.local
/etc/ppp/ppp-login
Replace
Set global PPP options.
Yes
Yes
/etc/sysconfig/crond
Replace
Turn off all mail from cron job.
Yes
Yes
Cron configuration files are also added to /etc/cron.d
/etc/sysconfig/init
Replace
Change the terminal font for success, failure, and warning to bold that is easier to see in color.
Yes
Yes
/etc/fstab
Delta
Add security setting for cdrom, floppy, tmpfs, sysfs if present.
Yes
No
/etc/php.ini
Replace
Configure PHP used by the SMI and other Communication Manager scripts.
Yes
Yes
/etc/systemd/system/rsyslog.socket
/etc/systemd/system/rsyslog.service
/etc/systemd/system/nbsyslog.socket
/etc/systemd/system/nbsyslog.service
/etc/systemd/system/hp-sshd.service
/etc/systemd/system/httpd.service
/etc/systemd/system/fixFstab.service
/etc/systemd/system/rngd.service
/etc/systemd/system/auto_upgr.service
Replace (add)
Services initialization scripts for systemd.
Yes
Yes
Services needed by Communication Manager.
/etc/aide.conf
/etc/cron.daily/aide
Replace
Configuration files for the AIDE intrusion detection.
Yes (See Note)
No
To enable or disable AIDE, use the command: setCMAide <enabled | disabled>
Note:
After installation, set the entry 'CustomAIDEFiles enabled' in /etc/ecs.conf, if custom changes to AIDE are desired
/etc/termcap
Replace (add)
This configures terminal capability for legacy terminals.
Yes
Yes
/etc/vimrc
Replace (add)
System wide vim initializations.
Yes
Yes
/etc/sysconfig/apm-scripts/apmcontinue
/etc/sysconfig/harddiskhda
/etc/sysconfig/harddiskhdc
/etc/sysconfig/i18n
/etc/sendmail.cf
/etc/man.config
Replace (add)
These files are no longer used or needed by the operating system.
Yes
Yes