[CentOS-pt-br] Assunto: Iptables!
Adroaldo Cavalheiro
adroaldo_goncalves em yahoo.com.br
Terça Setembro 6 22:33:01 UTC 2016
Tenta isso.
iptables -A FORWARD -p tcp --dport 3051 -d 177.135.260.61 -j ACCEPTFaz o mesmo com as outras portas, é só repetir a regra.
Tirei deste Post no Vivaolinux.
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Em 14:03 ter, 6 de set de PM, Glenio Cortes Himmen<glenio.11622x em aparecida.go.gov.br> escreveu: Sou novo com IPTABLES e SQUID, preciso liberar um determinado programa para acessar o endereço e portas abaixo relacionados sem passar pelo proxy.
177.135.260.61:3051
177.135.250.61:5836
177.135.250.61:5837
177.135.250.61:725
As requisições de saída sairão do IP 172.16.0.48/255.255.255.192.
Abaixo o script firewall.sh que utilizo.
#!/bin/bash
#___________.__________________________ __ _____ .____ .____
#\_ _____/| \______ \_ _____/ \ / \/ _ \ | | | |
# | __) | || _/| __)_\ \/\/ / /_\ \| | | |
# | \ | || | \| \\ / | \ |___| |___
# \___ / |___||____|_ /_______ / \__/\ /\____|__ /_______ \_______ \
# \/ \/ \/ \/ \/ \/ \/
#####################################################################
# VARIAVEIS
#####################################################################
# -d ip de destino - rede destino - ip da rede 192.168.2.1 192.168.0.0/24
# -s ip de origem - rede de origem - ip da internet
# --sport NUMERO porta origem
# --dport NUMERO porta destino
# -j ACAO
LOG_OPTIONS="--log-tcp-sequence --log-ip-options --log-tcp-options --log-level info"
IPT="/sbin/iptables"
### INTERFACE DA REDE EXTERNA INTERNET
IF_EXT="eth0"
### INTERFACE DA REDE INTERNA LAN
IF_INT="eth1"
### REDE INTERNA
REDE_INTERNA="172.16.0.0/26"
### PORTAS LIBERADAS TCP INPUT
PORTAS_REDE_INTERNA="23 25 53 137 443 8080 1194 2928 3128 3389 80"
### PORTAS LIBERADAS UDP INPUT
PORTAS_UDP="53 161 3128"
### Portas liberadas de fora internet para a rede interna
PORTAS_FORWARD="23 25 53 443 8080 137 1194 2928 3389 3128"
# ======== FORWARD LIBERADO PARA IP EXTERNO
IP_FORWARD_EXTERNO="
189.2.188.173
187.5.111.45
"
### FORWARD LIBERADO PARA IP DA REDE INTERNA
### Informar os IP's da rede interna que poderão passar sem configurar o proxy
IP_FORWARD_INTERNO="
172.16.0.3
172.16.0.7
172.16.0.25
172.16.0.11
172.16.0.50
172.16.0.47
172.16.0.38
172.16.0.61
172.16.0.24
172.16.0.10
172.16.0.9
172.16.0.49
172.16.0.18
172.16.0.15
172.16.0.36
172.16.0.51
172.16.0.39
172.16.0.45
172.16.0.29
172.16.0.36
"
echo "INICIANDO FIREWALL ...................[OK]"
#####################################################################
# MODULOS
#####################################################################
/sbin/modprobe ip_conntrack
/sbin/modprobe ip_conntrack_ftp
/sbin/modprobe ip_nat_ftp
/sbin/modprobe iptable_nat
/sbin/modprobe ipt_tos
/sbin/modprobe ipt_MASQUERADE
echo "LIMPANDO AS REGRAS ...................[OK]"
### APAGANDO REGRAS PADRAO
$IPT -F
$IPT -t nat -F
$IPT -t mangle -F
### APAGANDO CHAINS
$IPT -X
$IPT -t nat -X
$IPT -t mangle -X
### ZERANDO CONTADORES
$IPT -Z
$IPT -t nat -Z
$IPT -t mangle -Z
echo "APLICADO REGRAS PADRÕES ..............[OK]"
######################################################################
# REGRAS PADROES
######################################################################
$IPT -P INPUT DROP
$IPT -P FORWARD DROP
$IPT -P OUTPUT ACCEPT
### HABILITANDO ROTEAMENTO NO KERNEL
echo "1" > /proc/sys/net/ipv4/ip_forward
######################################################################
# REGRAS DE NAT
######################################################################
### COMPARTILHAR INTERNET
#$IPT -t nat -A POSTROUTING -s $REDE_INTERNA -o $IF_EXT -j MASQUERADE
$IPT -t nat -A POSTROUTING -o $IF_EXT -j MASQUERADE
#Redirecionar 443 para 3128
#$IPT -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-ports 3128
### PROXY TRANSPARENTE
#$IPT -t nat -A PREROUTING -i $IF_EXT -p tcp --dport 80 -j DNAT --to 10.1.1.1:3128
#$IPT -t nat -A PREROUTING -i $IF_INT -p tcp --dport 80 -j REDIRECT --to-port 3128
### REDIRECIONAR ACESSO EXTERNO RDP PARA HOST INTERNO
#$IPT -t nat -A PREROUTING -i $IF_EXT -p tcp --dport 3389 -j DNAT --to-destination 10.1.1.54:3389
#$IPT -t filter -A FORWARD -i $IF_EXT -d 10.1.1.54 -p tcp --dport 3389 -j ACCEPT
echo "APLICANDO REGRAS MANUAIS .............[OK]"
#####################################################################
# REGRAS INPUT
#####################################################################
$IPT -t filter -A INPUT -p tcp -i lo -j ACCEPT
$IPT -t filter -A INPUT -p icmp -j ACCEPT
$IPT -t filter -A INPUT -p tcp --dport 443 -j DROP
for i in $PORTAS_REDE_INTERNA; do
$IPT -t filter -A INPUT -p tcp --dport $i -j ACCEPT
done
for i in $PORTAS_UDP; do
$IPT -A INPUT -p udp --dport $i -j ACCEPT
done
$IPT -t filter -A INPUT -m state --state INVALID,RELATED,ESTABLISHED -j ACCEPT
$IPT -t filter -A INPUT -j LOG $LOG_OPTIONS --log-prefix "LOG_INPUT"
$IPT -t filter -A INPUT -j DROP
#####################################################################
# REGRAS DE FORWARD
#####################################################################
### PORTAS FORWARD
for i in $PORTAS_FORWARD; do
$IPT -A FORWARD -p tcp --dport $i -j ACCEPT
done
### FORWARD EXTERNA INTERNET
for i in $IP_FORWARD_EXTERNO; do
$IPT -A FORWARD -d $i -j ACCEPT
done
### FORWARD INTERNO INTERNT
for i in $IP_FORWARD_INTERNO; do
$IPT -A FORWARD -s $i -j ACCEPT
done
###
for i in $PORTAS_UDP; do
$IPT -t filter -A FORWARD -p udp --dport $i -j ACCEPT
done
$IPT -t filter -A FORWARD -m state --state INVALID,RELATED,ESTABLISHED -j ACCEPT
$IPT -t filter -A FORWARD -j LOG $LOG_OPTIONS --log-prefix "LOG_FORWARD"
$IPT -t filter -A FORWARD -j DROP
echo "FIREWALL INICIADO ....................[OK]"
Gostaria da ajuda para saber o comando e onde colocar.
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