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Problemas de conexao iptables msn



Boa tarde pessoal,

Estou usando debian etch como firewall+proxy transparent e o problema e que o msn nao conecta, o que estou sera que tem de errado? Segue minhas regras e meu squid.conf. Desde ja agradeco.

#!/bin/bash
IPTABLES=/sbin/iptables
MODPROBE=/sbin/modprobe
echo "1" > /proc/sys/net/ipv4/ip_forward
$IPTABLES -F
$IPTABLES -t nat -F
$IPTABLES -t mangle -F

#######################################################
##                     POLITICAS                     ##
#######################################################
$MODPROBE iptable_nat
$MODPROBE iptable_filter
$MODPROBE iptable_mangle
$MODPROBE ip_nat_ftp
$MODPROBE ip_conntrack_ftp
$MODPROBE ipt_MASQUERADE
$MODPROBE ipt_REDIRECT

#######################################################
##                     POLITICAS                     ##
#######################################################
$IPTABLES -P INPUT DROP
$IPTABLES -P OUTPUT DROP
$IPTABLES -P FORWARD DROP

#######################################################
##                  REGRAS INPUT                     ##
#######################################################
# PERMITE INTERFACE LOOPBACK
$IPTABLES -A INPUT -i lo -j ACCEPT

# PERMITE ACESSO A INTERNET DO FIREWALL
$IPTABLES -A INPUT -p tcp -m multiport --sport 80,443,20,21 -j ACCEPT

# PERMITE ACESSO A INTERNET DO FIREWALL
$IPTABLES -A INPUT -p udp --sport 53 -j ACCEPT

# PERMITE ATUALIZACAO DINAMICA NO-IP
$IPTABLES -A INPUT -p tcp --sport 8245 -j ACCEPT

# PERMITE RESOLUCAO NOMES DNS
$IPTABLES -A INPUT -p udp -s 10.23.118.0/24 --dport 53 -j ACCEPT

# PERMITE ACESSO AO PROXY
$IPTABLES -A INPUT -p tcp -s 10.23.118.0/24 --dport 3128 -j ACCEPT

# PERMITE ACESSO AO MSN
$IPTABLES -A INPUT -p tcp -s 10.23.118.0/24 --dport 1863 -j ACCEPT

# TRAFEGO REDE EXTERNA
$IPTABLES -A INPUT -p tcp -i ppp+ -j ACCEPT

# PERMITE SSH
$IPTABLES -A INPUT -p tcp --dport 22 -j ACCEPT

# PERMITE ICMP
$IPTABLES -A INPUT -p icmp -j ACCEPT

# LOG
$IPTABLES -A INPUT -j LOG --log-prefix "BLOQUEIO INPUT "
#######################################################
##                  REGRAS OUTPUT                    ##
#######################################################
# PERMITE TODO TRAFEGO LOCAL PARA QUALQUER DESTINO
$IPTABLES -A OUTPUT -j ACCEPT

# PERMITE ATUALIZACAO DINAMICA NO-IP
$IPTABLES -A OUTPUT -p tcp --dport 8245 -j ACCEPT

# LOG
$IPTABLES -A OUTPUT -j LOG --log-prefix "BLOQUEIO OUTPUT "

#######################################################
##                       NAT                         ##
#######################################################

# REGRA DIRECIONAMENTO DEMAIS CONEXOES
$IPTABLES -t nat -A POSTROUTING -s 10.23.118.0/24 -o ppp0 -j MASQUERADE

# PROXY TRANSPARENTE
$IPTABLES -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j DNAT --to 10.23.118.1:3128


#######################################################
##                 REGRAS FORWARD                    ##
#######################################################
# NEGA MSN

# REGRAS ACESSO REDE INTERNA
$IPTABLES -A FORWARD -p tcp -s 10.23.118.0/24 -j ACCEPT
$IPTABLES -A FORWARD -p tcp -d 10.23.118.0/24 -j ACCEPT

# LOG
$IPTABLES -A FORWARD -j LOG --log-prefix "BLOQUEIO FORWARD "

http_port 3128 transparent
hierarchy_stoplist cgi-bin ?
acl QUERY urlpath_regex cgi-bin \?
cache deny QUERY
acl apache rep_header Server ^Apache
broken_vary_encoding allow apache
access_log /var/log/squid/access.log squid
hosts_file /etc/hosts
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern .               0       20%     4320
acl all src 0.0.0.0/0.0.0.0
#acl PALAVRAS_BLOQUEADAS url_regex -i "/etc/squid/regras/PALAVRAS_BLOQUEADAS.txt"
acl manager proto cache_object
acl LOCAL src 10.23.118.0/24
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443          # https
acl SSL_ports port 563          # snews
acl SSL_ports port 873          # rsync
acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
acl Safe_ports port 70          # gopher
acl Safe_ports port 210         # wais
acl Safe_ports port 1025-65535  # unregistered ports
acl Safe_ports port 280         # http-mgmt
acl Safe_ports port 488         # gss-http
acl Safe_ports port 591         # filemaker
acl Safe_ports port 777         # multiling http
acl Safe_ports port 631         # cups
acl Safe_ports port 873         # rsync
acl Safe_ports port 901         # SWAT
acl purge method PURGE
acl CONNECT method CONNECT
http_access allow manager localhost
http_access deny manager
http_access allow purge localhost
http_access deny purge
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
#http_access deny PALAVRAS_BLOQUEADAS
http_access allow localhost
http_access allow LOCAL
http_access deny all
http_reply_access allow all
icp_access allow all
cache_effective_group proxy
coredump_dir /var/spool/squid





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