masterthesis/openvpn-config/vpnserver.conf

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# Listen on 1194 for both IPv4 and IPv6
port 1194
proto udp
proto udp6
# We're using the layer 3 tunnel device
dev tun
# Certificates
ca /etc/openvpn/vpnserver/ca.crt
cert /etc/openvpn/vpnserver/vpnserver.crt
key /etc/openvpn/vpnserver/vpnserver.key
dh /etc/openvpn/vpnserver/dh2048.pem
# Make sure the client presents a certificate with "client role"
remote-cert-tls client
# Allow multiple connections using the same certificate?
#duplicate-cn
# net30 is point-to-point, compatible with windows
# TODO: Topology subnet is supposed to work with windows just fine. CHECK THIS
topology net30
# Use this IPv4 range for clients (/16, so we can cope with all possible clients)
server 10.183.0.0 255.255.0.0
# Use this IPv6 network for clients
server-ipv6 2001:638:614:1750::/64
# Do we need persistence here?
ifconfig-pool-persist /etc/openvpn/vpnserver/ipp.txt
# Make sure the client can still reach the OpenVPN server via its default gateway
push "route remote_host 255.255.255.255 net_gateway"
# Push routes for local networks
push "route 172.16.20.0 255.255.255.0 vpn_gateway"
# Push the whole /56 block for IPv6
push "route-ipv6 2003:638:614:1700::/56"
# Make sure to detect broken sessions
keepalive 10 60
# These are needed for reduced privileges? Probably yes.
persist-key
persist-tun
# Reduced privileges
user nobody
group nogroup
# Logging settings
verb 3
mute 5
# Have a status log
status /etc/openvpn/vpnserver/status.log