I am re-tackling attempting to get FOP2 to work from a remote server and everything reports correctly on the CLI, but FOP2/admin says "FOP2 Server is not responding. Be sure the service is running!"

[root@fop2 ~]# mysql -u fop2 -pfop222 -h pbx.domain.com asterisk -e "SHOW VARIABLES LIKE '%version%';"
+-------------------------+---------------------+
| Variable_name           | Value               |
+-------------------------+---------------------+
| protocol_version        | 10                  |
| version                 | 5.1.73              |
| version_comment         | Source distribution |
| version_compile_machine | x86_64              |
| version_compile_os      | redhat-linux-gnu    |
+-------------------------+---------------------+

[root@fop2 ~]# /usr/local/fop2/fop2_server --test
Flash Operator Panel 2 - Valid License (/usr/local/fop2/fop2.lic)
Flash Operator Panel 2 - Featureset: Basic
Flash Operator Panel 2 - Allowed Tenants: 5
Flash Operator Panel 2 - Licensed Plugin: queuestats
Flash Operator Panel 2 - Licensed Plugin: idletimer
Connection to manager OK!

[root@fop2 ~]# telnet pbx.domain.com 5038
Trying ...
Connected to.
Escape character is '^]'.
Asterisk Call Manager/1.1
Action: login
Username: fop2
Secret: fop222
Events: off

Response: Success
Message: Authentication accepted

^]
telnet> quit
Connection closed.
[root@fop2 ~]#

/var/www/html/fop2/admin/config.php

$DBHOST="IPOFPBXSYSTEM";
$DBUSER="fop2";
$DBPASS="fop222";
$DBNAME="asterisk";
$ENGINE='freepbx';

[general]
; AMI definitions
manager_host=IPOFPBXSYSTEM
manager_port=5038
manager_user=fop2
manager_secret=fop222

[root@fop2 ~]# service fop2 status
fop2_server (pid 1979) is running...
[root@fop2 ~]# pgrep fop2
1979

Any ideas what else to check?

I also ran the following:

mysql -u root -p -e "CREATE USER 'fop2'@'%' IDENTIFIED BY 'fop222';"
mysql -u root -p -e "GRANT ALL PRIVILEGES ON asterisk.* TO 'fop2'@'%';"

I'd really like some help with this, I'm going to fire up a Brand new Setup to test w/ instead of testing on a server w/ a bunch of configs from old setups.

I followed my notes on a brand new setup @ home w/ SNG7 + CentOS 6/FOP2 and it gave same error, disabled SELINUX and it worked :), thanks! Now on locking it down correctly , AKA IPTables + SELinux, I chose CentOS 6 because you Rec it in the guide, but I prefer CentOS 7.

Any chance you have a guide/ or the Commands to allow SELinux/IPTABLES/FirewallD for this setup? If not, it will be a good chance for me to learn a bit about SELinux and firewalls anyway, but if you have a writeup, I'd save the time for now :). This makes me very happy, thanks! Hopefully won't be bugging you for a while now, once I get it setup in its own VM, it won't be bothered when I mess with the PBX system. (Which will be a lot in the future, going from FreePBX 2.9/Ast 1.8 CentOS 5 >> SNG7 FreePBX 14/Ast ?? Hopefully is the plan!)