Outgoing iptables connections?

Question

iptables

Good day, for the second day I have been trying to correctly configure the firewall through iptables.
iptables-fw.sh
:

[email protected]:~# sh /etc/fw.sh
iptables v1.4.21: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
iptables v1.4.21: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
iptables: No chain/target/match by that name.
iptables: No chain/target/match by that name.
iptables: No chain/target/match by that name.
iptables: No chain/target/match by that name.
iptables: No chain/target/match by that name.
iptables: No chain/target/match by that name.

#!/bin/sh
IPT=/sbin/iptables

## FLUSH
$IPT -F
$IPT -X
$IPT -t nat -F
$IPT -t nat -X
$IPT -t mangle -F
$IPT -t mangle -X

$IPT -P INPUT DROP
$IPT -P OUTPUT ACCEPT
$IPT -P FORWARD DROP

$IPT -A INPUT -i lo -j ACCEPT
$IPT -A OUTPUT -o lo -j ACCEPT

$IPT -A INPUT -p tcp --dport 22 -j ACCEPT
$IPT -A OUTPUT -p tcp --sport 22 -j ACCEPT

$IPT -A INPUT -p tcp --dport 80 -j ACCEPT
$IPT -A OUTPUT -p tcp --sport 80 -j ACCEPT
$IPT -A INPUT -p tcp --dport 443 -j ACCEPT
$IPT -A OUTPUT -p tcp --sport 443 -j ACCEPT

# Allow FTP connections @ port 21
$IPT -A INPUT  -p tcp --sport 21 -m state --state ESTABLISHED -j ACCEPT
$IPT -A OUTPUT -p tcp --dport 21 -m state --state NEW,ESTABLISHED -j ACCEPT

# Allow Active FTP Connections
$IPT -A INPUT -p tcp --sport 20 -m state --state ESTABLISHED,RELATED -j ACCEPT
$IPT -A OUTPUT -p tcp --dport 20 -m state --state ESTABLISHED -j ACCEPT 

# Allow Passive FTP Connections
$IPT -A INPUT -p tcp --sport 1024: --dport 1024:  -m state --state ESTABLISHED -j ACCEPT
$IPT -A OUTPUT -p tcp --sport 1024: --dport 1024:  -m state --state ESTABLISHED,RELATED -j ACCEPT 

#DNS
$IPT -A OUTPUT -p udp --dport 53 --sport 1024:65535 -j ACCEPT

$IPT -A INPUT -p tcp --dport 1:1024
$IPT -A INPUT -p udp --dport 1:1024

$IPT -A INPUT -p tcp --dport 3306 -j DROP
$IPT -A INPUT -p tcp --dport 10000 -j DROP
$IPT -A INPUT -p udp --dport 10000 -j DROP

OUTPUT ACCEPT, why is there no connection?

[pid 2534] [client 37.x.x.x:41126] PHP Warning:  stream_socket_client(): unable to connect to tcp://186.2.164.183:25565 (Connection timed out) in /var/www/html/php/mcstat.php on line 126
[Fri Jan 08 13:29:42.616050 2016] [:error] [pid 2534] [client 37.x.x.x:41126] PHP Warning:  stream_set_timeout() expects parameter 1 to be resource, boolean given in /var/www/html/php/mcstat.php on line 127
[Fri Jan 08 13:29:43.170077 2016] [:error]

Everything works without iptables

Answer 1

Is the nf_conntrack module available and loaded?