ovpm/templates.go

package ovpm

const ccdFileTemplate = `
ifconfig-push {{ .IP }} {{ .NetMask }}

{{if .RedirectGW }}
push "redirect-gateway def1 bypass-dhcp"
{{ end }}

{{range .Servernets}}
push "route {{index . 0}} {{index . 1}}"
{{ end }}


{{range .Routes}}
push "route {{index . 0}} {{index . 1}} {{index . 2}}"
{{ end }}
`

const clientOvpnTemplate = `
# this ovpn file is automatically generated by [OVPM](https://github.com/cad/ovpm)

client
dev tun
server-poll-timeout 4
proto {{ .Proto }}
remote {{ .Hostname }} {{ .Port }}
resolv-retry infinite
ns-cert-type server
cipher AES-128-CBC
nobind
keepalive {{ .KeepalivePeriod }} {{ .KeepaliveTimeout }}
persist-key
persist-tun
{{ if .UseLZO }}comp-lzo{{ end }}
verb 3
auth-nocache

<ca>
{{ .CA }}</ca>
<cert>
{{ .Cert }}</cert>
<key>
{{ .Key }}</key>
`

const dh4096PemTemplate = `
-----BEGIN DH PARAMETERS-----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-----END DH PARAMETERS-----
`

const serverConfTemplate = `
;port 1194
port {{ .Port }}

# TCP or UDP server?
;proto tcp
proto {{ .Proto }}

# "dev tun" will create a routed IP tunnel,
# "dev tap" will create an ethernet tunnel.
# Use "dev tap0" if you are ethernet bridging
# and have precreated a tap0 virtual interface
# and bridged it with your ethernet interface.
# If you want to control access policies
# over the VPN, you must create firewall
# rules for the the TUN/TAP interface.
# On non-Windows systems, you can give
# an explicit unit number, such as tun0.
# On Windows, use "dev-node" for this.
# On most systems, the VPN will not function
# unless you partially or fully disable
# the firewall for the TUN/TAP interface.
;dev tap
dev tun

# Windows needs the TAP-Win32 adapter name
# from the Network Connections panel if you
# have more than one.  On XP SP2 or higher,
# you may need to selectively disable the
# Windows firewall for the TAP adapter.
# Non-Windows systems usually don't need this.
;dev-node MyTap

# SSL/TLS root certificate (ca), certificate
# (cert), and private key (key).  Each client
# and the server must have their own cert and
# key file.  The server and all clients will
# use the same ca file.
#
# See the "easy-rsa" directory for a series
# of scripts for generating RSA certificates
# and private keys.  Remember to use
# a unique Common Name for the server
# and each of the client certificates.
#
# Any X509 key management system can be used.
# OpenVPN can also use a PKCS #12 formatted key file
# (see "pkcs12" directive in man page).
;ca easy-rsa/keys/ca.crt
;cert easy-rsa/keys/server.crt
;key easy-rsa/keys/server.key  # This file should be kept secret

ca {{ .CACertPath }}
cert {{ .CertPath }}
key {{ .KeyPath }}

# Diffie hellman parameters.
# Generate your own with:
#   openssl dhparam -out dh1024.pem 1024
# Substitute 2048 for 1024 if you are using
# 2048 bit keys.
#dh dh1024.pem
;dh easy-rsa/keys/dh2048.pem
dh {{ .DHParamsPath }}

# Network topology
# Should be subnet (addressing via IP)
# unless Windows clients v2.0.9 and lower have to
# be supported (then net30, i.e. a /30 per client)
# Defaults to net30 (not recommended)
topology subnet

# Configure server mode and supply a VPN subnet
# for OpenVPN to draw client addresses from.
# The server will take 10.8.0.1 for itself,
# the rest will be made available to clients.
# Each client will be able to reach the server
# on 10.8.0.1. Comment this line out if you are
# ethernet bridging. See the man page for more info.
;server 10.8.0.0 255.255.255.0
server {{ .Net }} {{ .Mask }}

# Maintain a record of client <-> virtual IP address
# associations in this file.  If OpenVPN goes down or
# is restarted, reconnecting clients can be assigned
# the same virtual IP address from the pool that was
# previously assigned.
ifconfig-pool-persist ipp.txt

# Configure server mode for ethernet bridging.
# You must first use your OS's bridging capability
# to bridge the TAP interface with the ethernet
# NIC interface.  Then you must manually set the
# IP/netmask on the bridge interface, here we
# assume 10.8.0.4/255.255.255.0.  Finally we
# must set aside an IP range in this subnet
# (start=10.8.0.50 end=10.8.0.100) to allocate
# to connecting clients.  Leave this line commented
# out unless you are ethernet bridging.
;server-bridge 10.8.0.4 255.255.255.0 10.8.0.50 10.8.0.100

# Configure server mode for ethernet bridging
# using a DHCP-proxy, where clients talk
# to the OpenVPN server-side DHCP server
# to receive their IP address allocation
# and DNS server addresses.  You must first use
# your OS's bridging capability to bridge the TAP
# interface with the ethernet NIC interface.
# Note: this mode only works on clients (such as
# Windows), where the client-side TAP adapter is
# bound to a DHCP client.
;server-bridge

# Push routes to the client to allow it
# to reach other private subnets behind
# the server.  Remember that these
# private subnets will also need
# to know to route the OpenVPN client
# address pool (10.8.0.0/255.255.255.0)
# back to the OpenVPN server.
#route 192.168.90.0 255.255.255.0 10.8.0.2
#route 192.168.91.0 255.255.255.0 10.8.0.5
#route 192.168.92.0 255.255.255.0 10.8.0.3
#route 192.168.93.0 255.255.255.0 10.8.0.4
#push "route 172.16.100.0 255.255.255.0"
#push "route 192.168.60.0 255.255.255.0"
# To assign specific IP addresses to specific
# clients or if a connecting client has a private
# subnet behind it that should also have VPN access,
# use the subdirectory "ccd" for client-specific
# configuration files (see man page for more info).

# EXAMPLE: Suppose the client
# having the certificate common name "Thelonious"
# also has a small subnet behind his connecting
# machine, such as 192.168.40.128/255.255.255.248.
# First, uncomment out these lines:
#client-config-dir ccd
#route 192.168.90.0 255.255.255.0
# Then create a file ccd/Thelonious with this line:
#   iroute 192.168.40.128 255.255.255.248
# This will allow Thelonious' private subnet to
# access the VPN.  This example will only work
# if you are routing, not bridging, i.e. you are
# using "dev tun" and "server" directives.

# EXAMPLE: Suppose you want to give
# Thelonious a fixed VPN IP address of 10.9.0.1.
# First uncomment out these lines:
;client-config-dir ccd
client-config-dir {{ .CCDPath }}
# Then add this line to ccd/Thelonious:
#   ifconfig-push 10.9.0.1 10.9.0.2

crl-verify {{ .CRLPath }}
# Suppose that you want to enable different
# firewall access policies for different groups
# of clients.  There are two methods:
# (1) Run multiple OpenVPN daemons, one for each
#     group, and firewall the TUN/TAP interface
#     for each group/daemon appropriately.
# (2) (Advanced) Create a script to dynamically
#     modify the firewall in response to access
#     from different clients.  See man
#     page for more info on learn-address script.
;learn-address ./script

# If enabled, this directive will configure
# all clients to redirect their default
# network gateway through the VPN, causing
# all IP traffic such as web browsing and
# and DNS lookups to go through the VPN
# (The OpenVPN server machine may need to NAT
# or bridge the TUN/TAP interface to the internet
# in order for this to work properly).
;push "redirect-gateway def1 bypass-dhcp"
;push "redirect-gateway def1 bypass-dhcp"

# Certain Windows-specific network settings
# can be pushed to clients, such as DNS
# or WINS server addresses.  CAVEAT:
# http://openvpn.net/faq.html#dhcpcaveats
# The addresses below refer to the public
# DNS servers provided by opendns.com.
;push "dhcp-option DNS 208.67.222.222"
push "dhcp-option DNS {{ .DNS }}"

# Uncomment this directive to allow different
# clients to be able to "see" each other.
# By default, clients will only see the server.
# To force clients to only see the server, you
# will also need to appropriately firewall the
# server's TUN/TAP interface.
client-to-client

# Uncomment this directive if multiple clients
# might connect with the same certificate/key
# files or common names.  This is recommended
# only for testing purposes.  For production use,
# each client should have its own certificate/key
# pair.
#
# IF YOU HAVE NOT GENERATED INDIVIDUAL
# CERTIFICATE/KEY PAIRS FOR EACH CLIENT,
# EACH HAVING ITS OWN UNIQUE "COMMON NAME",
# UNCOMMENT THIS LINE OUT.
;duplicate-cn

# The keepalive directive causes ping-like
# messages to be sent back and forth over
# the link so that each side knows when
# the other side has gone down.
# Ping every 10 seconds, assume that remote
# peer is down if no ping received during
# a 120 second time period.
;keepalive 10 120
keepalive {{ .KeepalivePeriod }} {{ .KeepaliveTimeout }}

# For extra security beyond that provided
# by SSL/TLS, create an "HMAC firewall"
# to help block DoS attacks and UDP port flooding.
#
# Generate with:
#   openvpn --genkey --secret ta.key
#
# The server and each client must have
# a copy of this key.
# The second parameter should be '0'
# on the server and '1' on the clients.
;tls-auth ta.key 0 # This file is secret

# Select a cryptographic cipher.
# This config item must be copied to
# the client config file as well.
;cipher BF-CBC        # Blowfish (default)
;cipher AES-128-CBC   # AES
;cipher DES-EDE3-CBC  # Triple-DES
cipher AES-128-CBC

{{ if .UseLZO }}
# Enable compression on the VPN link.
# If you enable it here, you must also
# enable it in the client config file.
comp-lzo{{ end }}

# The maximum number of concurrently connected
# clients we want to allow.
;max-clients 100

# It's a good idea to reduce the OpenVPN
# daemon's privileges after initialization.
#
# You can uncomment this out on
# non-Windows systems.
user nobody
group nogroup

# The persist options will try to avoid
# accessing certain resources on restart
# that may no longer be accessible because
# of the privilege downgrade.
persist-key
persist-tun

# Output a short status file showing
# current connections, truncated
# and rewritten every minute.
status openvpn-status.log 5

# By default, log messages will go to the syslog (or
# on Windows, if running as a service, they will go to
# the "\Program Files\OpenVPN\log" directory).
# Use log or log-append to override this default.
# "log" will truncate the log file on OpenVPN startup,
# while "log-append" will append to it.  Use one
# or the other (but not both).
;log         openvpn.log
log-append  openvpn.log

# Set the appropriate level of log
# file verbosity.
#
# 0 is silent, except for fatal errors
# 4 is reasonable for general usage
# 5 and 6 can help to debug connection problems
# 9 is extremely verbose
verb 3

# Silence repeating messages.  At most 20
# sequential messages of the same message
# category will be output to the log.
;mute 20
`