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我最近在 AWS EC2 实例上设置了 OpenVPN 服务器,以便将我的办公室连接到 AWS VPC 环境。
我使用 TunnelBlick 作为 VPN 客户端,一切都很好!我可以 ssh 到 VPC 中的私有(private) IP。但是,从我的办公室主机解析 DNS VPC 名称(如果我从 VPC 中的 EC2 实例运行它,我可以)不起作用。
我当前的解决方案是在 EC2 实例上使用 Unbound 设置 DNS 转发器(这恰好是我正在运行 OpenVPN 服务器的实例) - 但由于某种原因它无法正常工作。一旦连接到 VPN 服务器,您将如何启用 VPN 客户端以解析 VPC 中的私有(private)主机名?
我很迷茫,所以如果你有任何其他想法,或者可以根据我目前的设置找出问题所在,我将永远感激:)
OpenVPN 服务器配置
port 1194 #- change the port you want
proto udp #- protocol can be tcp or udp
dev tun
tun-mtu 1500
tun-mtu-extra 32
mssfix 1450
ca /etc/openvpn/easy-rsa/2.0/keys/ca.crt
cert /etc/openvpn/easy-rsa/2.0/keys/server.crt
key /etc/openvpn/easy-rsa/2.0/keys/server.key
dh /etc/openvpn/easy-rsa/2.0/keys/dh2048.pem
server 10.8.0.0 255.255.255.0
push "redirect-gateway def1 bypass-dhcp"
push "dhcp-option DNS 8.8.8.8"
push "dhcp-option DNS 8.8.4.4"
push "dhcp-option DNS <PUBLIC_IP_OF_THE_SERVER_RUNNING_OPENVPN_AND_UNBOUND>"
keepalive 5 30
comp-lzo
persist-key
persist-tun
status server-tcp.log
verb 3
server:
interface: 0.0.0.0
access-control: 0.0.0.0/0 allow
remote-control:
forward-zone:
name: "."
forward-addr: 172.31.0.2
##############################################
# Client-side OpenVPN 2.0 config file #
# for connecting to multi-client server. #
# #
# This configuration can be used by multiple #
# clients, however each client should have #
# its own cert and key files. #
# #
# On Windows, you might want to rename this #
# file so it has a .ovpn extension #
##############################################
# Specify that we are a client and that we
# will be pulling certain config file directives
# from the server.
client
# Use the same setting as you are using on
# the server.
# 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,
# you may need to disable the firewall
# for the TAP adapter.
;dev-node MyTap
# Are we connecting to a TCP or
# UDP server? Use the same setting as
# on the server.
;proto tcp
proto udp
# The hostname/IP and port of the server.
# You can have multiple remote entries
# to load balance between the servers.
remote <PUBLIC_IP_OF_THE_SERVER_RUNNING_OPENVPN_AND_UNBOUND> 1194
;remote my-server-2 1194
# Choose a random host from the remote
# list for load-balancing. Otherwise
# try hosts in the order specified.
;remote-random
# Keep trying indefinitely to resolve the
# host name of the OpenVPN server. Very useful
# on machines which are not permanently connected
# to the internet such as laptops.
resolv-retry infinite
# Most clients don't need to bind to
# a specific local port number.
nobind
# Downgrade privileges after initialization (non-Windows only)
;user nobody
;group nobody
# Try to preserve some state across restarts.
persist-key
persist-tun
# If you are connecting through an
# HTTP proxy to reach the actual OpenVPN
# server, put the proxy server/IP and
# port number here. See the man page
# if your proxy server requires
# authentication.
;http-proxy-retry # retry on connection failures
;http-proxy [proxy server] [proxy port #]
# Wireless networks often produce a lot
# of duplicate packets. Set this flag
# to silence duplicate packet warnings.
;mute-replay-warnings
# SSL/TLS parms.
# See the server config file for more
# description. It's best to use
# a separate .crt/.key file pair
# for each client. A single ca
# file can be used for all clients.
ca /Users/antoniogomez/ca.crt
cert /Users/antoniogomez/client.crt
key /Users/antoniogomez/client.key
# Verify server certificate by checking
# that the certicate has the nsCertType
# field set to "server". This is an
# important precaution to protect against
# a potential attack discussed here:
# http://openvpn.net/howto.html#mitm
#
# To use this feature, you will need to generate
# your server certificates with the nsCertType
# field set to "server". The build-key-server
# script in the easy-rsa folder will do this.
;ns-cert-type server
# If a tls-auth key is used on the server
# then every client must also have the key.
;tls-auth ta.key 1
# Select a cryptographic cipher.
# If the cipher option is used on the server
# then you must also specify it here.
;cipher x
# Enable compression on the VPN link.
# Don't enable this unless it is also
# enabled in the server config file.
comp-lzo
# Set log file verbosity.
verb 3
# Silence repeating messages
;mute 20
# This updates the resolvconf with dns settings
setenv PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
script-security 2
up /etc/openvpn/update-resolv-conf.sh
down /etc/openvpn/update-resolv-conf.sh
down-pre
nameserver 8.8.8.8
nameserver 8.8.8.4
nameserver PUBLIC_IP_OF_THE_SERVER_RUNNING_OPENVPN_AND_UNBOUND
[antoniogomez:~]$ telnet PUBLIC_IP_OF_THE_SERVER_RUNNING_OPENVPN_AND_UNBOUND 53
Trying PUBLIC_IP_OF_THE_SERVER_RUNNING_OPENVPN_AND_UNBOUND...
Connected to ec2-instance.us-west-1.compute.amazonaws.com.
Escape character is '^]'.
最佳答案
所以这就是我让它工作的方式!首先,我搬到 工作。绑定(bind) 而不是 未绑定(bind) (受此视频的启发 here
绑定(bind)服务器配置
//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//
options {
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt";
dnssec-enable no;
dnssec-validation no;
allow-query { any;};
allow-recursion { any;};
forward only;
forwarders { 172.31.0.2; }; # This is my VPC internal DNS Server
};
logging {
channel default_debug {
file "data/named.run";
severity dynamic;
};
};
zone "." IN {
type hint;
file "named.ca";
};
include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";
现在确保将您安装的 DNS 服务器的 IP 推送到您的 VPN 客户端(在本例中为绑定(bind)服务器)
port 1194 #- change the port you want
proto udp #- protocol can be tcp or udp
dev tun
tun-mtu 1500
tun-mtu-extra 32
mssfix 1450
ca /etc/openvpn/easy-rsa/2.0/keys/ca.crt
cert /etc/openvpn/easy-rsa/2.0/keys/server.crt
key /etc/openvpn/easy-rsa/2.0/keys/server.key
dh /etc/openvpn/easy-rsa/2.0/keys/dh2048.pem
server 10.8.0.0 255.255.255.0
push "redirect-gateway def1"
push "dhcp-option DNS <IP_OF_SERVER_RUNNING_BOTH_OPENVPN_AND_BIND>" # This line push your DNS server to be used by the VPN clients
keepalive 5 30
comp-lzo
persist-key
persist-tun
status server-tcp.log
verb 3
显然,在 linux 上运行的 VPN 客户端需要“一些帮助”才能将"new"DNS 服务器与以下配置一起使用(参见配置中的最后几行,从
here 获取脚本):
##############################################
# Client-side OpenVPN 2.0 config file #
# for connecting to multi-client server. #
# #
# This configuration can be used by multiple #
# clients, however each client should have #
# its own cert and key files. #
# #
# On Windows, you might want to rename this #
# file so it has a .ovpn extension #
##############################################
# Specify that we are a client and that we
# will be pulling certain config file directives
# from the server.
client
# Use the same setting as you are using on
# the server.
# 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,
# you may need to disable the firewall
# for the TAP adapter.
;dev-node MyTap
# Are we connecting to a TCP or
# UDP server? Use the same setting as
# on the server.
;proto tcp
proto udp
# The hostname/IP and port of the server.
# You can have multiple remote entries
# to load balance between the servers.
remote <IP_OF_SERVER_RUNNING_BOTH_OPENVPN_AND_BIND> 1194
;remote my-server-2 1194
# Choose a random host from the remote
# list for load-balancing. Otherwise
# try hosts in the order specified.
;remote-random
# Keep trying indefinitely to resolve the
# host name of the OpenVPN server. Very useful
# on machines which are not permanently connected
# to the internet such as laptops.
resolv-retry infinite
# Most clients don't need to bind to
# a specific local port number.
nobind
# Downgrade privileges after initialization (non-Windows only)
;user nobody
;group nobody
# Try to preserve some state across restarts.
persist-key
persist-tun
# If you are connecting through an
# HTTP proxy to reach the actual OpenVPN
# server, put the proxy server/IP and
# port number here. See the man page
# if your proxy server requires
# authentication.
;http-proxy-retry # retry on connection failures
;http-proxy [proxy server] [proxy port #]
# Wireless networks often produce a lot
# of duplicate packets. Set this flag
# to silence duplicate packet warnings.
;mute-replay-warnings
# SSL/TLS parms.
# See the server config file for more
# description. It's best to use
# a separate .crt/.key file pair
# for each client. A single ca
# file can be used for all clients.
ca /Users/myusername/name_of_my_ca.crt
cert /Users/myusername/name_of_my_client.crt
key /Users/myusername/name_of_my_client.key
# Verify server certificate by checking
# that the certicate has the nsCertType
# field set to "server". This is an
# important precaution to protect against
# a potential attack discussed here:
# http://openvpn.net/howto.html#mitm
#
# To use this feature, you will need to generate
# your server certificates with the nsCertType
# field set to "server". The build-key-server
# script in the easy-rsa folder will do this.
;ns-cert-type server
# If a tls-auth key is used on the server
# then every client must also have the key.
;tls-auth ta.key 1
# Select a cryptographic cipher.
# If the cipher option is used on the server
# then you must also specify it here.
;cipher x
# Enable compression on the VPN link.
# Don't enable this unless it is also
# enabled in the server config file.
comp-lzo
# Set log file verbosity.
verb 3
# Silence repeating messages
;mute 20
# This updates the resolvconf with dns settings
setenv PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
script-security 2
up /etc/openvpn/update-resolv-conf.sh
down /etc/openvpn/update-resolv-conf.sh
down-pre
现在,一旦您的 VPN 服务器和绑定(bind)服务器正确设置了上述 VPN 客户端(您的私有(private) mac/办公室计算机等),在连接到 VPN 服务器时,不仅可以访问
ssh
。私有(private) IP,但也解析 VPC 中的内部 AWS 主机名,例如
ip-172-31-0-63.us-west-1.compute.internal
编辑:
client
dev tun
proto udp
remote PUBLIC_IP 1194
tls-version-min 1.2
tls-cipher <CIPHERS>
cipher AES-256-CBC
auth SHA512
resolv-retry infinite
auth-retry none
nobind
persist-key
persist-tun
remote-cert-tls server
comp-lzo
verb 3
tls-client
<ca>
...
</ca>
<cert>
...
</cert>
<key>
...
</key>
<tls-auth>
...
</tls-auth>
关于amazon-web-services - VPN 客户端在 AWS 中解析私有(private) DNS 主机名,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48032854/
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