diff --git a/zabbix.spec b/zabbix.spec
index 6e02846..306acac 100644
--- a/zabbix.spec
+++ b/zabbix.spec
@@ -33,7 +33,7 @@ Patch1:		fping3-sourceip-option.patch
 Buildroot:	%{_tmppath}/zabbix-%{version}-%{release}-root-%(%{__id_u} -n)
 
 %ifarch x86_64
-%if 0%{?rhel} >= 6
+%if 0%{?rhel} >= 7
 %define build_agent2 1
 %endif
 %endif
@@ -44,6 +44,10 @@ Buildroot:	%{_tmppath}/zabbix-%{version}-%{release}-root-%(%{__id_u} -n)
 %endif
 
 BuildRequires:	make
+%if 0%{?rhel} == 6
+BuildRequires:  sqlite-devel
+BuildRequires:  mysql-devel
+%endif
 %if 0%{?rhel} >= 7
 %if 0%{?rhel} >= 8
 BuildRequires:	mariadb-connector-c-devel
@@ -141,7 +145,7 @@ Group:			Applications/Internet
 %description sender
 Zabbix sender command line utility.
 
-%if 0%{?rhel} >= 7
+%if 0%{?rhel} >= 6
 %package js
 Summary:		Zabbix JS
 Group:			Applications/Internet
@@ -153,9 +157,16 @@ Zabbix js command line utility.
 Summary:		Zabbix proxy for MySQL or MariaDB database
 Group:			Applications/Internet
 Requires:		fping
+%if 0%{?rhel} >= 7
 Requires(post):		systemd
 Requires(preun):	systemd
 Requires(postun):	systemd
+%else
+Requires(post):         /sbin/chkconfig
+Requires(preun):        /sbin/chkconfig
+Requires(preun):        /sbin/service
+Requires(postun):       /sbin/service
+%endif
 Provides:		zabbix-proxy = %{version}-%{release}
 Provides:		zabbix-proxy-implementation = %{version}-%{release}
 Obsoletes:		zabbix
@@ -163,7 +174,9 @@ Obsoletes:		zabbix-proxy
 
 %description proxy-mysql
 Zabbix proxy with MySQL or MariaDB database support.
+%endif
 
+%if 0%{?rhel} >= 7
 %package proxy-pgsql
 Summary:		Zabbix proxy for PostgreSQL database
 Group:			Applications/Internet
@@ -178,7 +191,9 @@ Obsoletes:		zabbix-proxy
 
 %description proxy-pgsql
 Zabbix proxy with PostgreSQL database support.
+%endif
 
+%if 0%{?rhel} >= 6
 %package proxy-sqlite3
 Summary:		Zabbix proxy for SQLite3 database
 Group:			Applications/Internet
@@ -193,7 +208,9 @@ Obsoletes:		zabbix-proxy
 
 %description proxy-sqlite3
 Zabbix proxy with SQLite3 database support.
+%endif
 
+%if 0%{?rhel} >= 7
 %package server-mysql
 Summary:		Zabbix server for MySQL or MariaDB database
 Group:			Applications/Internet
@@ -442,7 +459,7 @@ sed -i -e 's|/usr/bin/traceroute|/bin/traceroute|' database/sqlite3/data.sql
 # change log directory for Java Gateway
 sed -i -e 's|/tmp/zabbix_java.log|/var/log/zabbix/zabbix_java_gateway.log|g' src/zabbix_java/lib/logback.xml
 
-%if 0%{?rhel} >= 7
+%if 0%{?rhel} >= 6
 # copy sql files for servers
 cat database/mysql/schema.sql > database/mysql/create.sql
 cat database/mysql/images.sql >> database/mysql/create.sql
@@ -489,20 +506,25 @@ build_flags="
 
 %if 0%{?rhel} >= 6
 build_flags="$build_flags --with-openssl"
-%endif
 
-%if 0%{?rhel} >= 7
 %configure $build_flags --enable-proxy --with-sqlite3
 make %{?_smp_mflags}
 mv src/zabbix_proxy/zabbix_proxy src/zabbix_proxy/zabbix_proxy_sqlite3
 
+%if 0%{?rhel} >= 7
 build_flags="$build_flags --enable-server --enable-proxy --enable-java"
+%else
+build_flags="$build_flags --enable-proxy"
+%endif
 
 %configure $build_flags --with-mysql
 make %{?_smp_mflags}
+%if 0%{?rhel} >= 7
 mv src/zabbix_server/zabbix_server src/zabbix_server/zabbix_server_mysql
+%endif
 mv src/zabbix_proxy/zabbix_proxy src/zabbix_proxy/zabbix_proxy_mysql
 
+%if 0%{?rhel} >= 7
 export PATH="/usr/pgsql-12/bin/:$PATH"
 export CFLAGS="-I /usr/pgsql-12/include/ $CFLAGS"
 export LDFLAGS="-L /usr/pgsql-12/lib/ $LDFLAGS"
@@ -510,6 +532,7 @@ export LDFLAGS="-L /usr/pgsql-12/lib/ $LDFLAGS"
 make %{?_smp_mflags}
 mv src/zabbix_server/zabbix_server src/zabbix_server/zabbix_server_pgsql
 mv src/zabbix_proxy/zabbix_proxy src/zabbix_proxy/zabbix_proxy_pgsql
+%endif
 
 touch src/zabbix_server/zabbix_server
 touch src/zabbix_proxy/zabbix_proxy
@@ -536,19 +559,29 @@ mkdir -p $RPM_BUILD_ROOT%{_localstatedir}/run/zabbix
 %if 0%{?rhel} >= 7
 install -m 0755 -p src/zabbix_server/zabbix_server_* $RPM_BUILD_ROOT%{_sbindir}/
 rm $RPM_BUILD_ROOT%{_sbindir}/zabbix_server
+%endif
+%if 0%{?rhel} >= 6
 install -m 0755 -p src/zabbix_proxy/zabbix_proxy_* $RPM_BUILD_ROOT%{_sbindir}/
 rm $RPM_BUILD_ROOT%{_sbindir}/zabbix_proxy
+%endif
 
+%if 0%{?rhel} >= 7
 # delete unnecessary files from java gateway
 rm $RPM_BUILD_ROOT%{_sbindir}/zabbix_java/settings.sh
 rm $RPM_BUILD_ROOT%{_sbindir}/zabbix_java/startup.sh
 rm $RPM_BUILD_ROOT%{_sbindir}/zabbix_java/shutdown.sh
+%endif
 
+%if 0%{?rhel} >= 6
 # install scripts and modules directories
 mkdir -p $RPM_BUILD_ROOT/usr/lib/zabbix
+%if 0%{?rhel} >= 7
 mv $RPM_BUILD_ROOT%{_datadir}/zabbix/alertscripts $RPM_BUILD_ROOT/usr/lib/zabbix
+%endif
 mv $RPM_BUILD_ROOT%{_datadir}/zabbix/externalscripts $RPM_BUILD_ROOT/usr/lib/zabbix
+%endif
 
+%if 0%{?rhel} >= 7
 mv $RPM_BUILD_ROOT%{_sbindir}/zabbix_java/lib/logback.xml $RPM_BUILD_ROOT/%{_sysconfdir}/zabbix/zabbix_java_gateway_logback.xml
 rm $RPM_BUILD_ROOT%{_sbindir}/zabbix_java/lib/logback-console.xml
 mv $RPM_BUILD_ROOT%{_sbindir}/zabbix_java $RPM_BUILD_ROOT/%{_datadir}/zabbix-java-gateway
@@ -622,7 +655,8 @@ cat conf/zabbix_server.conf | sed \
 	-e '/^# SNMPTrapperFile=.*/a \\nSNMPTrapperFile=/var/log/snmptrap/snmptrap.log' \
 	-e '/^# SocketDir=.*/a \\nSocketDir=/var/run/zabbix' \
 	> $RPM_BUILD_ROOT%{_sysconfdir}/zabbix/zabbix_server.conf
-
+%endif
+%if 0%{?rhel} >= 6
 cat conf/zabbix_proxy.conf | sed \
 	-e '/^# PidFile=/a \\nPidFile=%{_localstatedir}/run/zabbix/zabbix_proxy.pid' \
 	-e 's|^LogFile=.*|LogFile=%{_localstatedir}/log/zabbix/zabbix_proxy.log|g' \
@@ -632,7 +666,8 @@ cat conf/zabbix_proxy.conf | sed \
 	-e '/^# SNMPTrapperFile=.*/a \\nSNMPTrapperFile=/var/log/snmptrap/snmptrap.log' \
 	-e '/^# SocketDir=.*/a \\nSocketDir=/var/run/zabbix' \
 	> $RPM_BUILD_ROOT%{_sysconfdir}/zabbix/zabbix_proxy.conf
-
+%endif
+%if 0%{?rhel} >= 7
 cat src/zabbix_java/settings.sh | sed \
 	-e 's|^PID_FILE=.*|PID_FILE="/var/run/zabbix/zabbix_java.pid"|g' \
 	> $RPM_BUILD_ROOT%{_sysconfdir}/zabbix/zabbix_java_gateway.conf
@@ -644,6 +679,8 @@ mkdir -p $RPM_BUILD_ROOT%{_sysconfdir}/logrotate.d
 cat %{SOURCE3} | sed \
 	-e 's|COMPONENT|server|g' \
 	> $RPM_BUILD_ROOT%{_sysconfdir}/logrotate.d/zabbix-server
+%endif
+%if 0%{?rhel} >= 6
 cat %{SOURCE3} | sed \
 	-e 's|COMPONENT|proxy|g' \
 	> $RPM_BUILD_ROOT%{_sysconfdir}/logrotate.d/zabbix-proxy
@@ -882,9 +919,14 @@ fi
 
 %preun proxy-mysql
 if [ "$1" = 0 ]; then
+%if 0%{?rhel} >= 7
 %systemd_preun zabbix-proxy.service
 /usr/sbin/update-alternatives --remove zabbix-proxy \
 %{_sbindir}/zabbix_proxy_mysql
+%else
+/sbin/service zabbix-proxy stop >/dev/null 2>&1
+/sbin/chkconfig --del zabbix-proxy
+%endif
 fi
 :
 
@@ -1035,12 +1077,14 @@ fi
 %{_bindir}/zabbix_sender
 %{_mandir}/man1/zabbix_sender.1*
 
-%if 0%{?rhel} >= 7
+%if 0%{?rhel} >= 6
 %files js
 %defattr(-,root,root,-)
 %doc AUTHORS ChangeLog COPYING NEWS README
 %{_bindir}/zabbix_js
+%endif
 
+%if 0%{?rhel} >= 7
 %files java-gateway
 %defattr(-,root,root,-)
 %doc AUTHORS ChangeLog COPYING NEWS README
@@ -1052,7 +1096,9 @@ fi
 %{_unitdir}/zabbix-java-gateway.service
 %{_prefix}/lib/tmpfiles.d/zabbix-java-gateway.conf
 %config(noreplace) %{_sysconfdir}/zabbix/zabbix_java_gateway_logback.xml
+%endif
 
+%if 0%{?rhel} >= 6
 %files proxy-mysql
 %defattr(-,root,root,-)
 %doc AUTHORS ChangeLog COPYING NEWS README
@@ -1063,10 +1109,14 @@ fi
 %attr(0755,zabbix,zabbix) %dir %{_localstatedir}/log/zabbix
 %attr(0755,zabbix,zabbix) %dir %{_localstatedir}/run/zabbix
 %{_mandir}/man8/zabbix_proxy.8*
+%if 0%{?rhel} >= 7
 %{_unitdir}/zabbix-proxy.service
 %{_prefix}/lib/tmpfiles.d/zabbix-proxy.conf
+%endif
 %{_sbindir}/zabbix_proxy_mysql
+%endif
 
+%if 0%{?rhel} >= 7
 %files proxy-pgsql
 %defattr(-,root,root,-)
 %doc AUTHORS ChangeLog COPYING NEWS README
@@ -1080,7 +1130,9 @@ fi
 %{_unitdir}/zabbix-proxy.service
 %{_prefix}/lib/tmpfiles.d/zabbix-proxy.conf
 %{_sbindir}/zabbix_proxy_pgsql
+%endif
 
+%if 0%{?rhel} >= 6
 %files proxy-sqlite3
 %defattr(-,root,root,-)
 %doc AUTHORS ChangeLog COPYING NEWS README
@@ -1091,10 +1143,14 @@ fi
 %attr(0755,zabbix,zabbix) %dir %{_localstatedir}/log/zabbix
 %attr(0755,zabbix,zabbix) %dir %{_localstatedir}/run/zabbix
 %{_mandir}/man8/zabbix_proxy.8*
+%if 0%{?rhel} >= 7
 %{_unitdir}/zabbix-proxy.service
 %{_prefix}/lib/tmpfiles.d/zabbix-proxy.conf
+%endif
 %{_sbindir}/zabbix_proxy_sqlite3
+%endif
 
+%if 0%{?rhel} >= 7
 %files server-mysql
 %defattr(-,root,root,-)
 %doc AUTHORS ChangeLog COPYING NEWS README