diff --git a/source/resources/apps/postgres-xl/README.md b/source/resources/apps/postgres-xl/README.md
index d60b513..258d635 100644
--- a/source/resources/apps/postgres-xl/README.md
+++ b/source/resources/apps/postgres-xl/README.md
@@ -26,6 +26,30 @@ pgxl-coord-1
 pgxl-coord-2
 pgxl-coord-3
 
+# Open Up firewall.
+Open up firewall ports for postgres and others. All TCP (?).
+Postgres:      5432
+GTM:          20001-20003
+Coordinator:  30001-30003, 31001-31003
+Data Node:    40001-40003, 41001-41003
+
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport  5432 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 20001 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 20002 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 20003 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 30001 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 30002 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 30003 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 31001 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 31002 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 31003 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 40001 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 40002 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 40003 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 41001 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 41002 -j ACCEPT
+-A INPUT -p tcp --dest 10.53.1.0/24 --dport 41003 -j ACCEPT
+
 
 # Set up SSH between hosts
 
@@ -119,23 +143,32 @@ add datanode    master name host port pooler dir waldir         extraServerConf
 add datanode    slave  name host port pooler dir waldir archDir
 
 
-
 XLDIR=/usr/local/pgsql
 export XLDIR
 pgxc_ctl prepare config empty
 
-pgxc_ctl add gtm master gtm_1 pg-pgxl-gtm-1 20001 "$XLDIR/gtm"
-XXX slave or proxy?
-XXX pgxc_ctl add gtm slave  gtm_2 pg-pgxl-gtm-2 20001 "$XLDIR/gtm"
-XXX pgxc_ctl add gtm_proxy  gtm_2 pg-pgxl-gtm-2 20001 "$XLDIR/gtm"
+===============================
+vim pgxc_ctl/pgxc_ctl.conf
+Comment out:
+coordPgHbaEntries=(::1/128)
+datanodePgHbaEntries=(::1/128)
+
+Enable/extend:
+coordPgHbaEntries=(127.0.0.1/32 10.53.1.0/24)
+datanodePgHbaEntries=(127.0.0.1/32 10.53.1.0/24)
+===============================
+
+XXX Set up slaves/proxies
+
+pgxc_ctl add gtm master gtm_1 pg-pgxl-gtm-1 20001 "$XLDIR/gtm-1"
+XXX pgxc_ctl add gtm slave  gtm_2 pg-pgxl-gtm-2 20002 "$XLDIR/gtm-2"
+XXX pgxc_ctl add gtm_proxy  gtm_2 pg-pgxl-gtm-2 20003 "$XLDIR/gtm-3"
 
 pgxc_ctl add coordinator master coord_1 pg-pgxl-coord-1 30001 31001 "$XLDIR/coord-1" none none
-XXX master or slaves?
 pgxc_ctl add coordinator master coord_2 pg-pgxl-coord-2 30001 31001 "$XLDIR/coord-2" none none
 pgxc_ctl add coordinator master coord_3 pg-pgxl-coord-3 30001 31001 "$XLDIR/coord-3" none none
 
 pgxc_ctl add datanode master datanode_1 pg-pgxl1 40001 41001 "$XLDIR/data-1" none none none
-XXX master or slaves?
 pgxc_ctl add datanode master datanode_2 pg-pgxl2 40001 41001 "$XLDIR/data-2" none none none
 pgxc_ctl add datanode master datanode_3 pg-pgxl3 40001 41001 "$XLDIR/data-3" none none none
 pgxc_ctl add datanode master datanode_4 pg-pgxl4 40001 41001 "$XLDIR/data-4" none none none
@@ -143,41 +176,15 @@ pgxc_ctl add datanode master datanode_5 pg-pgxl5 40001 41001 "$XLDIR/data-5" non
 pgxc_ctl monitor all createdb -p 30001 test
 
 
-# Open Up firewall.
-Open up firewall ports for postgres and others. All TCP (?).
-Postgres:      5432
-GTM:          20001
-Coordinator:  30001
-Data Node:    40001
-
--A INPUT -p tcp --dest 10.53.1.0/24 --dport  5432 -j ACCEPT
--A INPUT -p tcp --dest 10.53.1.0/24 --dport 20001 -j ACCEPT
--A INPUT -p tcp --dest 10.53.1.0/24 --dport 30001 -j ACCEPT
--A INPUT -p tcp --dest 10.53.1.0/24 --dport 40001 -j ACCEPT
-
-
-# OmniDB
-wget https://omnidb.org/dist/2.12.0/omnidb-server_2.12.0-debian-amd64.deb
-dpkg -i omnidb-server_2.12.0-debian-amd64.deb
-
-Open firewall port 8000 and 25482
-
-This file isn't used: /opt/omnidb-server/omnidb.conf
-In the pre-packaged .deb, it runs as root... Config is here:
-/root/.omnidb/omnidb-server/omnidb.conf
-listening_address = 0.0.0.0
-
-Add Postgres-XL plugin:
-wget  https://omnidb.org/dist/plugins/omnidb-xl_1.0.0.zip 
-unzip omnidb-xl_1.0.0.zip
-sudo cp -r plugins/ static/ /opt/omnidb-server/OmniDB_app/
-sudo systemctl restart omnidb
-
-Log in with admin/admin and set up users/pass.
+# Create database
+ssh pgxl-coord-1
+sudo su - postgres
+psql -p 30001
+create database foo;
 
-# Notes
-Maybe add build dependency python3-dev (?) for PL/Python shared library.
-Maybe gettext.
-Maybe OpenSSL.
-XXX change prefix ?
+# Check it replicated:
+ssh pgxl1
+sudo su - postgres
+psql -p 40001
+\l