When routing traffic through a (IPSec) tunnel, an endpoint might need to do mss clamping if you are experiencing MTU issues. For example, you are using a site-to-site VPN network, with a specific gateway as endpoint. When browsing websites through the tunnel, some websites might not load properly. An example, using iptables to fix this… Continue reading TCP MSS clamping with iptables for IPSec tunnel
Tag: vpn
A gateway to forward all traffic to a remote VPN server
Suppose you’ve setup a VM and configured it as a site-to-site VPN with OpenVPN, using iroute and staticclients. You are using this VM as a default gateway for other VMs and now want to forward all traffic from the VMs not through the default gateway‘s adapter, but through the VPN tunnel. Why would you want… Continue reading A gateway to forward all traffic to a remote VPN server