diff --git a/iocAdmin/Db/Makefile b/iocAdmin/Db/Makefile
index efc38aa..64b33a3 100644
--- a/iocAdmin/Db/Makefile
+++ b/iocAdmin/Db/Makefile
@@ -12,6 +12,7 @@ include $(TOP)/configure/CONFIG
 # databases, templates, substitutions like this
 #
 DB += siteEnvVars.db
+DB += legacyEnvVars.db
 DB += iocAdminScanMon.db
 DB += ioc.db
 DB += iocRTOS.db
@@ -49,5 +50,5 @@ $(COMMON_DIR)/siteEnvVars.substitutions: $(EPICS_BASE)/configure/CONFIG_SITE_ENV
 	@echo { >> $@
 	@echo pattern >> $@
 	@echo { ENVNAME, ENVVAR, ENVTYPE } >> $@
-	@sed -n "s/^EPICS_\([A-Z_]*\).*/{\1, EPICS_\1, epics}/p" $^ >> $@
+	@sed -n "s/^EPICS_\([A-Z_]*\).*/{\1, EPICS_\1, epics}/p" $^ | sort -u >> $@
 	@echo } >> $@
diff --git a/iocAdmin/Db/legacyEnvVars.db b/iocAdmin/Db/legacyEnvVars.db
new file mode 100644
index 0000000..0f7751b
--- /dev/null
+++ b/iocAdmin/Db/legacyEnvVars.db
@@ -0,0 +1,15 @@
+alias($(IOCNAME):CA_CONN_TIME, $(IOCNAME):CA_CONN_TMO)
+alias($(IOCNAME):CA_AUTO_ADDR, $(IOCNAME):CA_AUTO_ADDR_LIST)
+alias($(IOCNAME):CA_RPTR_PORT, $(IOCNAME):CA_REPEATER_PORT)
+alias($(IOCNAME):CA_SRVR_PORT, $(IOCNAME):CA_SERVER_PORT)
+alias($(IOCNAME):CA_MAX_ARRAY, $(IOCNAME):CA_MAX_ARRAY_BYTES)
+alias($(IOCNAME):CA_SRCH_TIME, $(IOCNAME):CA_MAX_SEARCH_PERIOD)
+alias($(IOCNAME):CA_BEAC_TIME, $(IOCNAME):CA_BEACON_PERIOD)
+alias($(IOCNAME):CAS_SRVR_PORT, $(IOCNAME):CAS_SERVER_PORT)
+alias($(IOCNAME):CAS_AUTO_ADDR, $(IOCNAME):CAS_AUTO_BEACON_ADDR_LIST
+alias($(IOCNAME):CAS_ADDR_LIST, $(IOCNAME):CAS_BEACON_ADDR_LIST)
+alias($(IOCNAME):CAS_BEACON_PERIOD, $(IOCNAME):CAS_BEACON_PERIOD)
+alias($(IOCNAME):CAS_BEACON_PORT, $(IOCNAME):CAS_BEACON_PORT)
+alias($(IOCNAME):CAS_ADDR_INTF_LIST, $(IOCNAME):CAS_INTF_ADDR_LIST)
+alias($(IOCNAME):CAS_ADDR_IGNORE_LIST, $(IOCNAME):CAS_IGNORE_ADDR_LIST)
+alias($(IOCNAME):TZ, $(IOCNAME):TIMEZONE)