tun 인터페이스를 생성하지 않는 OpenVPN

어떤 이유로 OpenVPN은 tun0 인터페이스를 만들지 않으며 더 이상 무엇을 해야할지 전혀 모릅니다.

이것은 내 server.conf입니다.

local 192.168.178.60
dev tun
proto udp
port 1194
ca /etc/openvpn/easy-rsa/keys/ca.crt
cert /etc/openvpn/easy-rsa/keys/server.crt
key /etc/openvpn/easy-rsa/keys/server.key
dh /etc/openvpn/easy-rsa/keys/dh1024.pem
server 10.8.0.0 255.255.255.0
# server and remote endpoints
ifconfig 10.8.0.1 10.8.0.2
# Add route to Client routing table for the OpenVPN Server
push "route 10.8.0.1 255.255.255.255"
# Add route to Client routing table for the OPenVPN Subnet
push "route 10.8.0.0 255.255.255.0"
# your local subnet
push "route 192.168.178.60 255.255.255.0"
# Set your primary domain name server address to Google DNS 8.8.8.8
push "dhcp-option DNS 8.8.8.8"
push "redirect-gateway def1"
client-to-client
duplicate-cn
keepalive 10 120
tls-auth /etc/openvpn/easy-rsa/keys/ta.key 0
cipher AES-128-CBC
comp-lzo
user nobody
group nogroup
persist-key
persist-tun
status /var/log/openvpn-status.log 20
log /var/log/openvpn.log
verb 1
# This configuration file was originally written by Lauren Orsini at 
ReadWrite.

누구나해야 할 일이 있습니까?