## GENERAL ##

# TCP, port 443, tunneling
mode server
proto tcp
port 443
dev tun

## KEY, CERTS AND NETWORK CONFIGURATION ##
# Identity
ca ca.crt
# Public key
cert server.crt
# Private key
key server.key
# Symmetric encryption
dh dh1024.pem
# Improve security (DDOS, port flooding...)
# 0 for the server, 1 for the client
tls-auth ta.key 0
# Encryption protocol
cipher AES-256-CBC

# Network
# Subnetwork, the server will be the 10.8.0.1 and clients will take the other ips
server 10.8.0.0 255.255.255.0

# Redirect all IP network traffic originating on client machines to pass through the OpenVPN server
push "redirect-gateway def1"

# Alternatives DNS (FDN)
push "dhcp-option DNS 80.67.169.12" 
push "dhcp-option DNS 80.67.169.40"

# (OpenDNS)
# push "dhcp-option DNS 208.67.222.222" 
# push "dhcp-option DNS 208.67.220.220"

# (Google)
# push "dhcp-option DNS 8.8.8.8" 
# push "dhcp-option DNS 8.8.4.4"

# Ping every 10 seconds and if after 120 seconds the client doesn't respond we disconnect
keepalive 10 120
# Regenerate key each 5 hours (disconnect the client)
reneg-sec 18000

## SECURITY ##

# Downgrade privileges of the daemon
user nobody
group nogroup

# Persist keys (because we are nobody, so we couldn't read them again)
persist-key
# Don't close and re open TUN/TAP device
persist-tun
# Enable compression
comp-lzo

## LOG ##

# Verbosity
# 3/4 for a normal utilisation
verb 3
# Max 20 messages of the same category
mute 20
# Log gile where we put the clients status
status openvpn-status.log
# Log file
log-append /var/log/openvpn.log
# Configuration directory of the clients
client-config-dir ccd

## PASS ##

# Autoriser l'exécution de scripts externes en passant les mots de passe via les variables d'environnement
script-security 3 system

# Use the authenticated username as the common name, rather than the common name from the client cert
username-as-common-name
# Client certificate non requried
client-cert-not-required
# Use the connection script when a user wants to login
auth-user-pass-verify scripts/login.sh via-env
# Maximum of clients
max-clients 50
# Run this scripts when the client connects/disconnects
client-connect scripts/connect.sh
client-disconnect scripts/disconnect.sh