Firewall rules with iptables for OpenVPN This post is a follow-up of installing OpenVPN on Debian GNU/Linux post and provides information on setting up your firewall rules with iptables (8) for OpenVPN. It assumes you have installed your OpenVPN server already as described in this post here.
Sep 26, 2019 Configuring client-specific rules and access policies Suppose we are setting up a company VPN, and we would like to establish separate access policies for 3 different classes of users: System administrators — full access to all machines on the network; Employees — access only to Samba/email server; Contractors — access to a special server only; The basic approach we will take is (a) segregate each user class into its own virtual IP address Building a tunnelled VPN using ESP (static IPs, through In this chapter we shall demonstrate how to create a Virtual Private Network (VPN) using the IPsec ESP protocol in tunnel mode to connect two networks together over the Internet, one or more of which is behind a Network Address Translation (NAT) device.. 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
sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE sudo iptables -A FORWARD -i eth0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT sudo iptables -A FORWARD -i wlan0 -o eth0 -j ACCEPT Now I want to set up the same rules except use interface tun0-00 and forward all my traffic through my vpn tunnel.
Linux - How do I prevent VPN leaks using iptables? - IVPN Help Most VPN services use the "redirect-gateway def1" option to handle routing, but they don't touch iptables. So you need to disable "redirect-gateway def1", and handle routing changes in your scripts. For most customers we think using iptables-persistent is the better solution. linux - VPN iptables Forwarding: Net-to-net - Server Fault
How to Enable Logging in Iptables on Linux – TecAdmin
Simple IPtables script for an OpenVPN server · GitHub iptables -A FORWARD -i tun0 -s 172.16.100.0/24 -d 172.16.100.0/24 -j DROP. // allow vpn traffic. iptables -A FORWARD -i tun0 -s 172.16.100.0/24 -d 0.0.0.0/0 -m conntrack --ctstate NEW -j ACCEPT. also this should not be needed: iptables -A INPUT -i tun0 -j ACCEPT. iptables -A OUTPUT -o tun0 -j ACCEPT. cheers. openvpn - iptables forward traffic to vpn tunnel if open sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE sudo iptables -A FORWARD -i eth0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT sudo iptables -A FORWARD -i wlan0 -o eth0 -j ACCEPT Now I want to set up the same rules except use interface tun0-00 and forward all my traffic through my vpn tunnel. My iptable rules do not allow VPN connections - Server Fault