openvpn.config.template

# Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# use TCP instead of UDP (commonly not supported by load balancers)
proto tcp-client

# don't cache authorization information in memory
auth-nocache

# stop process if something goes wrong
remap-usr1 SIGTERM

# Use a dynamic tun device.
dev tun

# Additonal optimizations
txqueuelen 1000

# get all routing information from server
pull

cipher AES-256-CBC

tls-client
key "/srv/secrets/vpn-seed/tls.key"
cert "/srv/secrets/vpn-seed/tls.crt"
ca "/srv/secrets/vpn-seed/ca.crt"

tls-auth "/srv/secrets/tlsauth/vpn.tlsauth" 1
cipher AES-256-CBC

# https://openvpn.net/index.php/open-source/documentation/howto.html#mitm
remote-cert-tls server

# pull filter
pull-filter accept "route ${SERVICE_NETWORK_ADDRESS} ${SERVICE_NETWORK_NETMASK}"
pull-filter accept "route ${POD_NETWORK_ADDRESS} ${POD_NETWORK_NETMASK}"