<p>I deployed the OpenVPN server in the K8S cluster and deployed the OpenVPN client on a host outside the cluster. However, when I use client access, I can only access the POD on the host where the OpenVPN server is located, but cannot access the POD on other hosts in the cluster.
The network used by the cluster is Calico. I also added the following iptables rules to the openVPN server host in the cluster:</p>
<p>I found that I did not receive the package back when I captured the package of tun0 on the server.</p>

<p>When the server is deployed on hostnetwork, a forward rule is missing in the iptables field.</p>
