Simple IPtables script for an OpenVPN server · GitHub
Set up source NAT (SNAT) so that from your VPN client's perspective, the connection is coming from the VPN server: iptables -t nat -A POSTROUTING -d y.y.y.100 -p tcp --dport 6000 -j SNAT --to-source y.y.y.1 Set up a ProxyVM as a VPN gateway using iptables and CLI scripts. This method is more involved than the one above, but has anti-leak features that also make the connection fail closed should it be interrupted. It has been tested with Fedora 30 and Debian 10 templates. iptables -A INPUT -i tun0 -j DROP These rules will filter only the tun0 interface in case an OpenVPN connection is established to a VPN provider (remote Server, which is not in your control) for overcoming geo-blocking or for IP anonymization etc. So only requested data will get to you (IPTV and scraping media coverarts will all work with that). As you can see in the diagram Figure 2 [Example Virtual Private Network (VPN) through NAT] the two networks in our example will use a different /16 address block each carved from the private 10.0.0.0/8 address block. Each network is connected to the Internet by a gateway machine which has a private address in the specified range and a static
Set up a ProxyVM as a VPN gateway using iptables and CLI scripts. This method is more involved than the one above, but has anti-leak features that also make the connection fail closed should it be interrupted. It has been tested with Fedora 30 and Debian 10 templates.
On Linux, you could use a command such as this to NAT the VPN client traffic to the internet: iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE. This command assumes that the VPN subnet is 10.8.0.0/24 (taken from the server directive in the OpenVPN server configuration) and that the local ethernet interface is eth0. Linux iptables: Port Redirection Example - nixCraft
How to configure IPtables to open Ports in CentOS / RHEL
Jul 11, 2018 How to configure iptables for openvpn NAT the VPN client traffic to the Internet. change the ip address mask according to your info of tun0 result while running "ifconfig" command. iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE. If your default iptables OUTPUT value is not ACCEPT, you will also need a line like: iptables -A OUTPUT -o tun+ -j ACCEPT