過程 18.1. OpenVPN Server

1. # yum install openvpn
   			

   察看openvpn包中的檔案

   # rpm -ql openvpn
   /etc/openvpn
   /etc/rc.d/init.d/openvpn
   /usr/lib64/openvpn
   /usr/lib64/openvpn/plugin
   /usr/lib64/openvpn/plugin/lib
   /usr/lib64/openvpn/plugin/lib/openvpn-auth-pam.so
   /usr/lib64/openvpn/plugin/lib/openvpn-down-root.so
   /usr/sbin/openvpn
   /usr/share/doc/openvpn-2.1.1
   /usr/share/doc/openvpn-2.1.1/AUTHORS
   /usr/share/doc/openvpn-2.1.1/COPYING
   /usr/share/doc/openvpn-2.1.1/COPYRIGHT.GPL
   /usr/share/doc/openvpn-2.1.1/INSTALL
   /usr/share/doc/openvpn-2.1.1/PORTS
   /usr/share/doc/openvpn-2.1.1/README
   /usr/share/doc/openvpn-2.1.1/auth-pam.txt
   /usr/share/doc/openvpn-2.1.1/contrib
   /usr/share/doc/openvpn-2.1.1/contrib/README
   /usr/share/doc/openvpn-2.1.1/contrib/multilevel-init.patch
   /usr/share/doc/openvpn-2.1.1/contrib/openvpn-fwmarkroute-1.00
   /usr/share/doc/openvpn-2.1.1/contrib/openvpn-fwmarkroute-1.00/README
   /usr/share/doc/openvpn-2.1.1/contrib/openvpn-fwmarkroute-1.00/fwmarkroute.down
   /usr/share/doc/openvpn-2.1.1/contrib/openvpn-fwmarkroute-1.00/fwmarkroute.up
   /usr/share/doc/openvpn-2.1.1/contrib/pull-resolv-conf
   /usr/share/doc/openvpn-2.1.1/contrib/pull-resolv-conf/client.down
   /usr/share/doc/openvpn-2.1.1/contrib/pull-resolv-conf/client.up
   /usr/share/doc/openvpn-2.1.1/down-root.txt
   /usr/share/doc/openvpn-2.1.1/sample-config-files
   /usr/share/doc/openvpn-2.1.1/sample-config-files/README
   /usr/share/doc/openvpn-2.1.1/sample-config-files/client.conf
   /usr/share/doc/openvpn-2.1.1/sample-config-files/firewall.sh
   /usr/share/doc/openvpn-2.1.1/sample-config-files/home.up
   /usr/share/doc/openvpn-2.1.1/sample-config-files/loopback-client
   /usr/share/doc/openvpn-2.1.1/sample-config-files/loopback-server
   /usr/share/doc/openvpn-2.1.1/sample-config-files/office.up
   /usr/share/doc/openvpn-2.1.1/sample-config-files/openvpn-shutdown.sh
   /usr/share/doc/openvpn-2.1.1/sample-config-files/openvpn-startup.sh
   /usr/share/doc/openvpn-2.1.1/sample-config-files/roadwarrior-client.conf
   /usr/share/doc/openvpn-2.1.1/sample-config-files/roadwarrior-server.conf
   /usr/share/doc/openvpn-2.1.1/sample-config-files/server.conf
   /usr/share/doc/openvpn-2.1.1/sample-config-files/static-home.conf
   /usr/share/doc/openvpn-2.1.1/sample-config-files/static-office.conf
   /usr/share/doc/openvpn-2.1.1/sample-config-files/tls-home.conf
   /usr/share/doc/openvpn-2.1.1/sample-config-files/tls-office.conf
   /usr/share/doc/openvpn-2.1.1/sample-config-files/xinetd-client-config
   /usr/share/doc/openvpn-2.1.1/sample-config-files/xinetd-server-config
   /usr/share/doc/openvpn-2.1.1/sample-keys
   /usr/share/doc/openvpn-2.1.1/sample-keys/README
   /usr/share/doc/openvpn-2.1.1/sample-keys/ca.crt
   /usr/share/doc/openvpn-2.1.1/sample-keys/ca.key
   /usr/share/doc/openvpn-2.1.1/sample-keys/client.crt
   /usr/share/doc/openvpn-2.1.1/sample-keys/client.key
   /usr/share/doc/openvpn-2.1.1/sample-keys/dh1024.pem
   /usr/share/doc/openvpn-2.1.1/sample-keys/pass.crt
   /usr/share/doc/openvpn-2.1.1/sample-keys/pass.key
   /usr/share/doc/openvpn-2.1.1/sample-keys/pkcs12.p12
   /usr/share/doc/openvpn-2.1.1/sample-keys/server.crt
   /usr/share/doc/openvpn-2.1.1/sample-keys/server.key
   /usr/share/doc/openvpn-2.1.1/sample-scripts
   /usr/share/doc/openvpn-2.1.1/sample-scripts/auth-pam.pl
   /usr/share/doc/openvpn-2.1.1/sample-scripts/bridge-start
   /usr/share/doc/openvpn-2.1.1/sample-scripts/bridge-stop
   /usr/share/doc/openvpn-2.1.1/sample-scripts/bs
   /usr/share/doc/openvpn-2.1.1/sample-scripts/openvpn.init
   /usr/share/doc/openvpn-2.1.1/sample-scripts/openvpn.init.orig
   /usr/share/doc/openvpn-2.1.1/sample-scripts/ucn.pl
   /usr/share/doc/openvpn-2.1.1/sample-scripts/verify-cn
   /usr/share/man/man8/openvpn.8.gz
   /usr/share/openvpn
   /usr/share/openvpn/easy-rsa
   /usr/share/openvpn/easy-rsa/1.0
   /usr/share/openvpn/easy-rsa/1.0/README
   /usr/share/openvpn/easy-rsa/1.0/build-ca
   /usr/share/openvpn/easy-rsa/1.0/build-dh
   /usr/share/openvpn/easy-rsa/1.0/build-inter
   /usr/share/openvpn/easy-rsa/1.0/build-key
   /usr/share/openvpn/easy-rsa/1.0/build-key-pass
   /usr/share/openvpn/easy-rsa/1.0/build-key-pkcs12
   /usr/share/openvpn/easy-rsa/1.0/build-key-server
   /usr/share/openvpn/easy-rsa/1.0/build-req
   /usr/share/openvpn/easy-rsa/1.0/build-req-pass
   /usr/share/openvpn/easy-rsa/1.0/clean-all
   /usr/share/openvpn/easy-rsa/1.0/list-crl
   /usr/share/openvpn/easy-rsa/1.0/make-crl
   /usr/share/openvpn/easy-rsa/1.0/openssl.cnf
   /usr/share/openvpn/easy-rsa/1.0/revoke-crt
   /usr/share/openvpn/easy-rsa/1.0/revoke-full
   /usr/share/openvpn/easy-rsa/1.0/sign-req
   /usr/share/openvpn/easy-rsa/1.0/vars
   /usr/share/openvpn/easy-rsa/2.0
   /usr/share/openvpn/easy-rsa/2.0/Makefile
   /usr/share/openvpn/easy-rsa/2.0/README
   /usr/share/openvpn/easy-rsa/2.0/build-ca
   /usr/share/openvpn/easy-rsa/2.0/build-dh
   /usr/share/openvpn/easy-rsa/2.0/build-inter
   /usr/share/openvpn/easy-rsa/2.0/build-key
   /usr/share/openvpn/easy-rsa/2.0/build-key-pass
   /usr/share/openvpn/easy-rsa/2.0/build-key-pkcs12
   /usr/share/openvpn/easy-rsa/2.0/build-key-server
   /usr/share/openvpn/easy-rsa/2.0/build-req
   /usr/share/openvpn/easy-rsa/2.0/build-req-pass
   /usr/share/openvpn/easy-rsa/2.0/clean-all
   /usr/share/openvpn/easy-rsa/2.0/inherit-inter
   /usr/share/openvpn/easy-rsa/2.0/list-crl
   /usr/share/openvpn/easy-rsa/2.0/openssl-0.9.6.cnf
   /usr/share/openvpn/easy-rsa/2.0/openssl.cnf
   /usr/share/openvpn/easy-rsa/2.0/pkitool
   /usr/share/openvpn/easy-rsa/2.0/revoke-full
   /usr/share/openvpn/easy-rsa/2.0/sign-req
   /usr/share/openvpn/easy-rsa/2.0/vars
   /usr/share/openvpn/easy-rsa/2.0/whichopensslcnf
   /var/run/openvpn
   			

2. key

   # cd /usr/share/openvpn/easy-rsa/2.0/
   
   vim vars
   export KEY_COUNTRY="CN"
   export KEY_PROVINCE="GD"
   export KEY_CITY="Shenzhen"
   export KEY_ORG="http://www.example.com"
   export KEY_EMAIL="neo.chen@example.com"
   
   # chmod +x *
   # cp openssl-1.0.0.cnf openssl.cnf
   
   # source ./vars
   ./clean-all
   ./build-ca
   ./build-key-server server
   ./build-key neo
   ./build-dh
   
   # cp keys/ca.key keys/ca.crt keys/dh1024.pem keys/server.key keys/server.crt /etc/openvpn/
   			

3. server.conf

   cp /usr/share/doc/openvpn-2.2.2/sample-config-files/server.conf /etc/openvpn/
   vim /etc/openvpn/server.conf
   			

4. # vim /etc/sysctl.conf
   # Controls IP packet forwarding
   net.ipv4.ip_forward = 1
   			

   使IP轉發生效

   sysctl -w net.ipv4.ip_forward=1
   			

5. # /etc/init.d/openvpn start
   Starting openvpn:                                          [  OK  ]