安装openvpn
不再赘述
准备证书文件
主要有以下文件:
(服务端)
ca.crt
dh2048.pem
server.crt
server.key
(客户端)
ca.crt
client01.key
dp-client.key
配置服务端
1. 修改 /etc/config/openvpn, 修改如下
config openvpn sample_server
# Set to to enable this instance:
option enabled
# Which local IP address should OpenVPN
# listen on? (optional)
option local 0.0.0.0
# Which TCP/UDP port should OpenVPN listen on?
# If you want to run multiple OpenVPN instances
# on the same machine, use a different port
# number for each one. You will need to
# open up this port on your firewall.
option port
# TCP or UDP server?
# option proto tcp
option proto udp
# "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.
# option dev tap
option dev tun
# 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 # formatted key file
# (see "pkcs12" directive in man page).
option ca /etc/openvpn/ca.crt
option cert /etc/openvpn/server.crt
# This file should be kept secret:
option key /etc/openvpn/server.key
# Diffie hellman parameters.
# Generate your own with:
# openssl dhparam -out dh1024.pem
# Substitute if you are using
# bit keys.
option dh /etc/openvpn/dh2048.pem
# 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.
option server "10.8.0.0 255.255.255.0"
# 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.
option ifconfig_pool_persist /tmp/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.
# option server_bridge "10.8.0.4 255.255.255.0 10.8.0.50 10.8.0.100"
# 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. 注意, 这边需要根据服务端所在的内网网段来修改, 如果有多个, 则需要添加多行
list push "route 192.168.11.0 255.255.255.0"
# list push "route 192.168.20.0 255.255.255.0"
# 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:
# option client_config_dir /etc/openvpn/ccd
# list route "192.168.40.128 255.255.255.248"
# 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:
# option client_config_dir /etc/openvpn/ccd
# list route "10.9.0.0 255.255.255.252"
# list route "192.168.100.0 255.255.255.0"
# Then add this line to ccd/Thelonious:
# ifconfig-push "10.9.0.1 10.9.0.2"
# Suppose that you want to enable different
# firewall access policies for different groups
# of clients. There are two methods:
# () Run multiple OpenVPN daemons, one for each
# group, and firewall the TUN/TAP interface
# for each group/daemon appropriately.
# () (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.
# option learn_address /etc/openvpn/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
# the TUN/TAP interface to the internet in
# order for this to work properly).
# CAVEAT: May break client's network config if
# client's local DHCP server packets get routed
# through the tunnel. Solution: make sure
# client's local DHCP server is reachable via
# a more specific route than the default route
# of 0.0.0.0/0.0.0.0.
# list push "redirect-gateway"
# Certain Windows-specific network settings
# can be pushed to clients, such as DNS
# or WINS server addresses. CAVEAT:
# http://openvpn.net/faq.html#dhcpcaveats
# list push "dhcp-option DNS 10.8.0.1"
# list push "dhcp-option WINS 10.8.0.1"
# 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.
# option 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.
# option 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 seconds, assume that remote
# peer is down if no ping received during
# a second time period.
option keepalive "10 120"
# 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 '
# on the server and ' on the clients.
# This file is secret:
# option tls_auth "/etc/openvpn/ta.key 0"
# Select a cryptographic cipher.
# This config item must be copied to
# the client config file as well.
# Blowfish (default):
option cipher BF-CBC
# AES:
# option cipher AES--CBC
# Triple-DES:
# option cipher DES-EDE3-CBC
# Enable compression on the VPN link.
# If you enable it here, you must also
# enable it in the client config file.
# LZ4 requires OpenVPN 2.4+ client and server
# option compress lz4
# LZO is compatible with most OpenVPN versions
# (set "compress lzo" on 2.4+ clients, and "comp-lzo yes" on older clients)
option compress lzo
# The maximum number of concurrently connected
# clients we want to allow.
# option max_clients
# The persist options will try to avoid
# accessing certain resources on restart
# that may no longer be accessible because
# of the privilege downgrade.
option persist_key
option persist_tun
option user nobody
# Output a short status file showing
# current connections, truncated
# and rewritten every minute.
option status /tmp/openvpn-status.log
# 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).
option log /tmp/openvpn.log
# option log_append /tmp/openvpn.log
# Set the appropriate level of log
# file verbosity.
#
# is silent, except for fatal errors
# is reasonable for general usage
# and can help to debug connection problems
# is extremely verbose
option verb
# Silence repeating messages. At most
# sequential messages of the same message
# category will be output to the log.
# option mute
2. 通过界面 Network-> Interfaces-> Add New interface:
Name of new interface: vpn0,
Protocol: Unmanaged
Cover the following interface: 勾选 Ethernet Adapter: "tun0"
Submit,
然后再点击Edit进入, 在Advanced Settings里, 勾选 Bring up on boot, Save & Apply
在 Firewall Settings中, 点选 unspecified -or- create输入vpn, Save & Apply
3. 通过界面 Network->Firewall->General Settings->General Settings
Input: accept
Output: accept
Forward: reject
Masquerading: 勾选
Covered networks: 依然只选vpn0
Inter-Zone Forwarding-> Allow forward to destination zones: 如果要openvpn客户端能访问lan, 则勾选lan, 如果要openvpn客户端能访问wan, 则勾选wan
Inter-Zone Forwarding-> Allow forward from source zones: 如果要openvpn客户端能访问lan, 则勾选lan, 不勾选wan
Save & Apply
注意: 这一步与官网的配置说明 (https://wiki.openwrt.org/doc/howto/vpn.openvpn) 不同, 经测试, 仅配置vpn_forwarding_lan_in, vpn_forwarding_lan_out 这些规则, 而不配置Inter-Zone Forwarding是无效的
配置客户端
这是客户端的配置
client dev tun proto udp remote resolv-retry infinite nobind persist-key persist-tun ca s02/ca.crt cert s02/dp-client.crt key s02/client01.key remote-cert-tls server comp-lzo verb