Build Options¶

OSSEC has a number of options that can be set or changed at build time. These options can change the behavior or resource utilization by the OSSEC processes.

Required¶

TARGET¶

The TARGET is the type of system being built.

This is set during the compilation, either through the install.sh script or manually in the src directory:

$ cd ossec-hids-*/src
$ make TARGET=server

Available options:

server: OSSEC Management Server

local: Local OSSEC installation

agent: OSSEC Agent

hybrid: Hybrid OSSEC server

winagent: Windows Agent

Optional¶

A number of options are set in the Makefile, but can be modified at compile time.

ZLIB_SYSTEM¶

If set to yes the system installed zlib will be used

Default: yes

PCRE2_SYSTEM¶

If set to yes the system installed pcre2 will be used

Default: no

LUA_ENABLE¶

If set to yes the installation process will build lua

Default: no

MAXAGENTS¶

The maximum number of supported agents

Default: 2048

USE_PRELUDE¶

Enable forwarding alerts to Prelude-IDS

Default: no

USE_ZEROMQ¶

Enable forwarding events via ZeroMQ

Default: no

USE_GEOIP¶

Enable Lookups against the GeoIP database

Default: no

USE_INOTIFY¶

Enable realtime support in syscheck via inotify in Linux

Default: enabled on Linux and Windows, disabled on other operating systems

USE_PCRE2_JIT¶

Enable the use of pcre2 Just In Time (JIT) support. If the installation process compiles PCRE2 this will be enabled. If the system installed PCRE2 is used, it must support JIT if this is enabled.

Default: yes

REUSE_ID¶

Allow authd to re-use agent IDs

Default: no

Settings¶

A listing of the default settings.

$ cd ossec-hids-*/src
$ make settings

General settings:
    TARGET:           server
    V:
    DEBUG:
    DEBUGAD:
    PREFIX:           /var/ossec
    MAXAGENTS:        2048
    REUSE_ID:         no
    DATABASE:
    ONEWAY:           no
    CLEANFULL:        no
User settings:
    OSSEC_GROUP:      ossec
    OSSEC_USER:       ossec
    OSSEC_USER_MAIL:  ossecm
    OSSEC_USER_REM:   ossecr
ZLIB settings:
    ZLIB_SYSTEM:      yes
    ZLIB_INCLUDE:
    ZLIB_LIB:         os_zlib.a
PCRE2 settings:
    PCRE2_SYSTEM:     y
    PCRE2_INCLUDE:
Lua settings:
    LUA_PLAT:         posix
    LUA_ENABLE:       no
USE settings:
    USE_ZEROMQ:       no
    USE_GEOIP:        no
    USE_PRELUDE:      no
    USE_OPENSSL:      auto
    USE_INOTIFY:      no
    USE_SQLITE:
    USE_PCRE2_JIT:    yes
Mysql settings:
    includes:
    libs:
Pgsql settings:
    includes:
    libs:
Defines:
    -DMAX_AGENTS=2048 -DOSSECHIDS -DDEFAULTDIR="/var/ossec" -DUSER="ossec" -DREMUSER="ossecr" -DGROUPGLOBAL="ossec" -DMAILUSER="ossecm" -DOpenBSD -pthread -DZLIB_SYSTEM -DUSE_PCRE2_JIT -DLIBOPENSSL_ENABLED
Compiler:
    CFLAGS          -I/usr/local/include -DMAX_AGENTS=2048 -DOSSECHIDS -DDEFAULTDIR="/var/ossec" -DUSER="ossec" -DREMUSER="ossecr" -DGROUPGLOBAL="ossec" -DMAILUSER="ossecm" -DOpenBSD -pthread -DZLIB_SYSTEM -DUSE_PCRE2_JIT -DLIBOPENSSL_ENABLED -Wall -Wextra -I./ -I./headers/
    LDFLAGS          -lm -L/usr/local/lib -lpcre2-8 -lssl -lcrypto -lz
    CC              cc
    MAKE            gmake