Centos Install VPN pptpd firewall iptables forwarding settings

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CentOS installation VPN appears some of the site can not access the problem! Some forwarding rule settings for iptables

The NAT conversion rule is established, otherwise the dial cannot be connected to the public network through the remote gateway.

Iptables-t nat-a postrouting-o eth0-j snat–to-source $src _ip

Centos 6.4 Installing VPN problems with some Web sites that are inaccessible

Allow connection to PPTP service, 1723 for PPTP service port

Iptables-a input-p tcp-m tcp–dport 1723-j ACCEPT

Iptables-a forward-p tcp–syn-s 10.64.64.0/24-j TCPMSS–SET-MSS 1356

A VPN tunnel is allowed, otherwise the user name and password cannot be validated.

Iptables-a input-p gre-j ACCEPT