El 19/10/2010 04:30 p.m., Miguel Villavicencio escribió:
Hola:

Envia el archivo para revisar como haces para bloquear, gracias.

Saludos,


Miguel Villavicencio G.




Date: Tue, 19 Oct 2010 16:24:04 -0500
From: fsan...@rocaautomotriz.com.mx
To: centos-es@centos.org
Subject: Re: [CentOS-es] Liberar webmail

El 19/10/2010 03:25 p.m., ruben guerra nina escribió:
Hola Estimados usuarios de Linux
Tengo un problema para bloquear ultrasurf, ya que esta aplicacion usa el pto 
443, que tambien lo usan los webmail, como podria liberar el mail.google.com ?
74.125.47.1974.125.47.1874.125.47.1774.125.47.83
Tengo las reglas siguientes
#Bloqueo ultrasurfiptables -A FORWARD -p tcp --dport 9666 -j DROPiptables -A 
FORWARD -p tcp --dport 443 -j DROP
#Liberar direcciones de: mail.google.comiptables -A FORWARD -s 192.168.12.0/24 
-d 74.125.47.19/8 -p tcp --dport 443 -j ACCEPTiptables -A FORWARD -s 
74.125.47.19/8 -d 192.168.12.0/24 -p tcp --sport 443 -j ACCEPT
iptables -A FORWARD -s 192.168.12.0/24 -d 74.125.47.18/8 -p tcp --dport 443 -j 
ACCEPTiptables -A FORWARD -s 74.125.47.18/8 -d 192.168.12.0/24 -p tcp --sport 
443 -j ACCEPT
iptables -A FORWARD -s 192.168.12.0/24 -d 74.125.47.83/8 -p tcp --dport 443 -j 
ACCEPTiptables -A FORWARD -s 74.125.47.83/8 -d 192.168.12.0/24 -p tcp --sport 
443 -j ACCEPT
iptables -A FORWARD -s 192.168.12.0/24 -d 74.125.47.17/8 -p tcp --dport 443 -j 
ACCEPTiptables -A FORWARD -s 74.125.47.17/8 -d 192.168.12.0/24 -p tcp --sport 
443 -j ACCEPT
Saludos
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no se si te sirva yo he intentado bastantes formas de bloquear ultrasurf
pero la verdad tiene cientos de ips zombies y eso complica la situacion
ya que la mayoria me han funcionado temporalmente la unica forma que yo
encontre fue bloquear todo el trafico https (443) y voy liberando lo que
mis usuarios necesitan (bancos, gmail, paypal y otras) tengo una lista
blanca de sitios https entre ellas van ips de gmail tengo un archivo txt
y cada vez que necesito liberar una ip solo la agrego al txt y vuelvo a
ejecutar el script. para que cargue la ip nueva y asi no saturar de
reglas mi script de firewall si te sirve dime para mandarte el archivo
con las ips..

--
Este mensaje ha sido analizado por MailScanner
en busca de virus y otros contenidos peligrosos,
y se considera que está limpio.
For all your IT requirements visit: http://www.transtec.co.uk

_______________________________________________
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http://lists.centos.org/mailman/listinfo/centos-es
                                        
_______________________________________________
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CentOS-es@centos.org
http://lists.centos.org/mailman/listinfo/centos-es

mira esta es la regla que me permite hacer eso que te comentaba con la lista de ips blancas



echo abriendo puerto 443 para ips
sleep 1
for ipfilehttps in `cat /etc/rc.d/ipfile.txt`
do
echo `iptables -A FORWARD -s 192.168.0.0/24 -i ${INTIF} -d ${ipfilehttps} -p tcp --dport 443 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT`
done

y el archivo /etc/rc.d/ipfile.txt te lo adjunto son pocas ips pero te servira como base

salu2 y suerte

--
Este mensaje ha sido analizado por MailScanner
en busca de virus y otros contenidos peligrosos,
y se considera que está limpio.
For all your IT requirements visit: http://www.transtec.co.uk

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