Hi guys, i’ve got a little problem with my firewall rules.
I start my iptable configuration and my computer stop in TFTP. It doesn’t show me the fog boot menu
The ports TFTP are open so what’s my problem ?

[CODE]#!/bin/sh

BEGIN INIT INFO

Provides: PareFeu

Required-Start: $remote_fs $syslog

Required-Stop:

Default-Start: 2 3 4 5

Default-Stop: 0 1 6

Short-Description: Start daemon at boot time

Description: Enable service provided by daemon.

END INIT INFO

Vider les tables actuelles

iptables -t filter -F
iptables -t mangle -F
iptables -t nat -F

Vider les règles personnelles

iptables -t filter -X
iptables -t mangle -X
iptables -t nat -X

Interdire toute connexion entrante et sortante

iptables -t filter -P INPUT DROP
iptables -t filter -P FORWARD DROP
iptables -t filter -P OUTPUT DROP

Ne pas casser les connexions etablies

iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT

Autoriser loopback

iptables -t filter -A INPUT -i lo -j ACCEPT
iptables -t filter -A OUTPUT -o lo -j ACCEPT

ICMP (Ping)

iptables -t filter -A INPUT -p icmp -j ACCEPT
iptables -t filter -A OUTPUT -p icmp -j ACCEPT

SSH In

iptables -t filter -A INPUT -p tcp --dport 22 -j ACCEPT

SSH Out

iptables -t filter -A OUTPUT -p tcp --dport 22 -j ACCEPT

DNS In/Out

iptables -t filter -A OUTPUT -p tcp --dport 53 -j ACCEPT
iptables -t filter -A OUTPUT -p udp --dport 53 -j ACCEPT
iptables -t filter -A INPUT -p tcp --dport 53 -j ACCEPT
iptables -t filter -A INPUT -p udp --dport 53 -j ACCEPT

NTP Out

iptables -t filter -A OUTPUT -p udp --dport 123 -j ACCEPT

HTTP + HTTPS Out

iptables -t filter -A OUTPUT -p tcp --dport 80 -j ACCEPT
iptables -t filter -A OUTPUT -p tcp --dport 443 -j ACCEPT

HTTP + HTTPS In

iptables -t filter -A INPUT -p tcp --dport 80 -j ACCEPT
iptables -t filter -A INPUT -p tcp --dport 443 -j ACCEPT
iptables -t filter -A INPUT -p tcp --dport 8443 -j ACCEPT

FTP/TFTP Out

iptables -t filter -A OUTPUT -p tcp --dport 20:21 -j ACCEPT
iptables -t filter -A OUTPUT -p udp --dport 20:21 -j ACCEPT
iptables -t filter -A OUTPUT -p tcp --dport 67:68 -j ACCEPT
iptables -t filter -A OUTPUT -p udp --dport 67:68 -j ACCEPT

FTP/TFTP In

iptables -t filter -A INPUT -p tcp --dport 20:21 -j ACCEPT
iptables -t filter -A INPUT -p udp --dport 20:21 -j ACCEPT
iptables -t filter -A INPUT -p tcp --dport 67:69 -j ACCEPT
iptables -t filter -A INPUT -p udp --dport 67:69 -j ACCEPT

MySQL IN/OUT

iptables -t filter -A OUTPUT -p udp --port 3306 -j ACCEPT
iptables -t filter -A INPUT -p udp --port 3306 -j ACCEPT

#NFS IN/OUT
iptables -t filter -A OUTPUT -p udp --dport 2049 -j ACCEPT
iptables -t filter -A INPUT -p tcp --dport 2049 -j ACCEPT

iptables -t filter -A OUTPUT -p udp --dport 111 -j ACCEPT
iptables -t filter -A INPUT -p tcp --dport 111 -j ACCEPT
[/CODE]

thanks you for your ideas.

EDIT :
I find my problem

modprobe ip_conntrack_tftp
modprobe ip_conntrack_ftp