diff -rupN zb_org/src/libs/zbxdbcache/dbconfig.c zb_patched/src/libs/zbxdbcache/dbconfig.c
--- zb_org/src/libs/zbxdbcache/dbconfig.c	2013-02-12 15:27:22.000000000 +0400
+++ zb_patched/src/libs/zbxdbcache/dbconfig.c	2013-02-18 14:31:24.000000000 +0400
@@ -4127,6 +4127,9 @@ int	DCconfig_activate_host(DC_ITEM *item
 			dc_host->jmx_available = HOST_AVAILABLE_TRUE;
 			dc_host->jmx_disable_until = 0;
 			break;
+		case ITEM_TYPE_INTERNAL:
+			dc_host->available = HOST_AVAILABLE_TRUE;
+			break;
 		default:
 			goto unlock;
 	}
@@ -4187,6 +4190,13 @@ int	DCconfig_deactivate_host(DC_ITEM *it
 			available = &dc_host->jmx_available;
 			disable_until = &dc_host->jmx_disable_until;
 			break;
+		case ITEM_TYPE_INTERNAL:
+			errors_from = &dc_host->errors_from;
+			/* set date to disable host for sure */
+			*errors_from = 1;
+			available = &dc_host->available;
+			disable_until = &dc_host->disable_until;
+			break;
 		default:
 			goto unlock;
 	}
diff -rupN zb_org/src/libs/zbxdbhigh/proxy.c zb_patched/src/libs/zbxdbhigh/proxy.c
--- zb_org/src/libs/zbxdbhigh/proxy.c	2013-02-12 15:27:22.000000000 +0400
+++ zb_patched/src/libs/zbxdbhigh/proxy.c	2013-02-18 14:31:32.000000000 +0400
@@ -1062,6 +1062,10 @@ void	process_host_availability(struct zb
 	char			tmp[HOST_ERROR_LEN_MAX], *sql = NULL, *error_esc;
 	size_t			sql_alloc = 4 * ZBX_KIBIBYTE, sql_offset = 0, tmp_offset;
 	int			no_data;
+	DC_ITEM			item;
+	zbx_timespec_t		timespec;
+	int			available = HOST_AVAILABLE_TRUE;
+
 
 	zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
 
@@ -1098,24 +1102,32 @@ void	process_host_availability(struct zb
 		{
 			zbx_snprintf_alloc(&sql, &sql_alloc, &sql_offset, "available=%d,", atoi(tmp));
 			no_data = 0;
+			if (atoi(tmp) == HOST_AVAILABLE_FALSE)
+				available = HOST_AVAILABLE_FALSE;
 		}
 
 		if (SUCCEED == zbx_json_value_by_name(&jp_row, ZBX_PROTO_TAG_SNMP_AVAILABLE, tmp, sizeof(tmp)))
 		{
 			zbx_snprintf_alloc(&sql, &sql_alloc, &sql_offset, "snmp_available=%d,", atoi(tmp));
 			no_data = 0;
+			if (atoi(tmp) == HOST_AVAILABLE_FALSE)
+				available = HOST_AVAILABLE_FALSE;
 		}
 
 		if (SUCCEED == zbx_json_value_by_name(&jp_row, ZBX_PROTO_TAG_IPMI_AVAILABLE, tmp, sizeof(tmp)))
 		{
 			zbx_snprintf_alloc(&sql, &sql_alloc, &sql_offset, "ipmi_available=%d,", atoi(tmp));
 			no_data = 0;
+			if (atoi(tmp) == HOST_AVAILABLE_FALSE)
+				available = HOST_AVAILABLE_FALSE;
 		}
 
 		if (SUCCEED == zbx_json_value_by_name(&jp_row, ZBX_PROTO_TAG_JMX_AVAILABLE, tmp, sizeof(tmp)))
 		{
 			zbx_snprintf_alloc(&sql, &sql_alloc, &sql_offset, "jmx_available=%d,", atoi(tmp));
 			no_data = 0;
+			if (atoi(tmp) == HOST_AVAILABLE_FALSE)
+				available = HOST_AVAILABLE_FALSE;
 		}
 
 		if (SUCCEED == zbx_json_value_by_name(&jp_row, ZBX_PROTO_TAG_ERROR, tmp, sizeof(tmp)))
@@ -1164,6 +1176,22 @@ void	process_host_availability(struct zb
 			continue;
 		}
 
+		if (SUCCEED != DCget_host_by_hostid(&item.host, hostid)) {
+			zabbix_log(LOG_LEVEL_CRIT, "cannot get host with hostid: %d", hostid);
+			continue;
+		}
+
+		item.type = ITEM_TYPE_INTERNAL;
+		zbx_timespec(&timespec);
+
+		if (available == HOST_AVAILABLE_FALSE)
+			if (SUCCEED != DCconfig_deactivate_host(&item, timespec.sec))
+				zabbix_log(LOG_LEVEL_CRIT, "cannot deactivate host with hostid: %d",  item.host.hostid);
+
+		if (available == HOST_AVAILABLE_TRUE)
+			if (SUCCEED != DCconfig_activate_host(&item))
+				zabbix_log(LOG_LEVEL_CRIT, "cannot activate host with hostid: %d",  item.host.hostid);
+
 		sql_offset--;
 		zbx_snprintf_alloc(&sql, &sql_alloc, &sql_offset, " where hostid=" ZBX_FS_UI64 ";\n", hostid);