-Open VPN Server and Client -Install and configure Open VPN on Linux Server - Test server configuration -Test Client Connect VPN configuration

1. NETWORK ADMINISTRATION
OpenVPN Server on Linux
2013-2015
PASSERELLES NUMERIQEUS CAMBODIA
Street 371 Phum Tropeang Chhuk (Borey Sorla), Sangkat Tek Thia Khan Sek Sok P.O. Box 511 Phnom Penh,
Cambodia

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CONTENTS
LAB Instruction ..........................................................................................................................2
Windows......................................................................................Error! Bookmark not defined.
Install DHCP service..................................................................Error! Bookmark not defined.
Create DCHP Scope...................................................................Error! Bookmark not defined.
Exclude IP address amount 10 IP addresses .............................Error! Bookmark not defined.
Configure DHCP Option ............................................................Error! Bookmark not defined.
IP address Reservation..............................................................Error! Bookmark not defined.
Deny Client by filter Mac address .............................................Error! Bookmark not defined.
Create New scope for LAN-Client .............................................Error! Bookmark not defined.
Show DHCP audit log file ..........................................................Error! Bookmark not defined.
Suse Linux....................................................................................Error! Bookmark not defined.
Adding more NICs and Assign IP address...............Error! Bookmark not defined.
Install DHCP Relay Service ...........................................Error! Bookmark not defined.
Configure DHCP Relay Service.....................................Error! Bookmark not defined.
Let client request IP address........................................Error! Bookmark not defined.
Make sure between LAN client and Windows Server can:.. Error! Bookmark
not defined.

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LAB INSTRUCTION
SUSE LINUX ENTERPRISE SERVER 11
 LAN VPN Server
 Network Address: 192.168.102.0/24
 192.168.1.1 Router/Default Gateway
 192.168.1.1 DNS Server
 WAN
 Network address: 203.100.10.0/24
 203.100.10.1 Router/Default Gateway
 192.168.1.10 DNS Server
 172.16.120.3 – 172.16.120.254 Address pool/scope
 172.16.120.10 – 172.16.120.20 Address Exclusive
 Make sure the you have configure the hostname and ip address
of different LAN and WAN

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1. Install Service OpenVPN

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2. Configure VPN Server
a. Copy “ëasy-rsa” from /usr/share/openvpn/easy-rsa to “/etc/openvpn”
b. Generate the server key by go to /etc/openvpn and generate

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c. Edit and change the certificate attribute by go to /etc/openvpn/easy-rsa/vars

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d. Define keys directory

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e. Generation of the key (by cryptography method Diffie-Hellman with dh1024
bit)
f. Generation of key and certificate to authority of certification
- Create new user for vpn and client for generate the email address

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g. Generation of key and certificate to the server //information mixed with key
to create certificate then store in Server
h. Edit /etc/openvpn/easy-rsa/server.conf by changing

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- Ca ca.crt -> ca /etc/openvpn/easy-rsa/keys/ca.crt
- Cert server.crt -> cert /etc/openvpn/easy-rsa/keys/vpnserver.crt
- key server.key -> server.key /etc/openvpn/easy-rsa/keys/vpnserver.key
- dh dh1024.perm -> dh /etc/openvpn/easy-rsa/keys/dh1024.pem
- ;cipher DES-EDE3-CBC -> cipher DES-EDE3-CBC(encryption method)

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i. Generation of the keys and certificate to the client (for tola.leng user)

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3. Install/Configure OpenVPN Client

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-copy file ca.crt, tola.leng.crt, tola.leng.key to input into the configuration file and input the
certificate into C:Program FilesOpenVPNbin..........
-copy file client.ovpn to the folder config
-change configuration file client.ovpn

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-Finally save the file after we edit the information there are:
remote 203.100.10.1 1194
;remote 203.100.10.1 1194
ca "C:Program FilesOpenVPNbinca.crt"
cert "C:Program FilesOpenVPNbintolaleng.crt"
key "C:Program FilesOpenVPNbintolaleng.key"
cipher DES-EDE3-CBC

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4. Testing OpenVPN remotes
5. Testing to access File Server
6. Set only one user can remote in the same time.
The End!