VPN

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???????????????????????????????????(?????????????
VPN )????????????????

• ??????? ICT DAY ?????? 14 ??????? 2551
• ????????????????
• ????????????????

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Virtual Private Network (VPN)

• Virtual Private Network
• ????????????????????????
• ??????? ??????????????????????????????????????????
  ?????????? ???????????????????????????????????????
  ??????????????????????? ??????????????????????????
  ???? ????????????????????????????????????????????
  ????????????????????????????????????????
  ????????????????????????? ????????????????????????
  ?????????????????????????????????????????

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Virtual Private Network (VPN)

• VPN is Private Communications Network Existing
  within a Shared or Public network Especially the
  Internet
• ???????????????????? ?????????
• ????????? VPN ????????????????????????????????????
  ???????????? ?????????????????????
  ????????????????????????????
• ????????? VPN ????????????????????????????????????
  ?????????? ???????????????????????????????????????
  ???????????????
• ????????????????????????????????????? VPN
  ??????????????????????????

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Virtual Private Network (VPN)

• Virtual Private Network ???????????????? ??? VPN
• ??? ??????????????????????????????????????????????
  ????????????????????? ????????????????????????????
  ??????? ?????????????????????????????????????????
  ??????????????????????????????????????? ?????
  ???????????? ???????
• ????????? VPN ????? ?????????????????????????????
  ??????????????????????????????????????????????????
  ??????????????? ?????????????? ???????????????????
  ?? ???????????????????????????????????????????????
  VPN ?????????????????????????????????????????????
  ??????????????????????????????????????????
  ?????????????? (?????????????) ?????????????
  (????????? ???????????????????????????????????????
  ?????????? ???????????????????????????????????????
  ???????????) ?????????????????????????????????????
  ??????????????????????????????????????????????????
  ?????????? (???????????????????????????)
  ??????????????? ??????????

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?????? VPN

• VPN ?? 3 ?????? ?????????????????????????
• Access VPN (Host-to-Net VPN)
• Intranet VPN (Site-to-Site VPN)
• Extranet VPN

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?????? VPN

• 1. Access VPN ???????????????????????????????
  VPN ????????????????????????? ????????????????????
  ??????????? 2 ?????? ????????????
  ????????????????????????????? ????? ????????
  ???????????????????????? ??????????? ???????????
  ???????????????????????? ?????????
  ??????????????????? ???????????? ???????????????
  ?????????????? ????????????????????????????
  (Network Access Server-NAS) ??????????????
  ???????????????? ?????????????????? ??????????
  ????????????????????? ?????????????????????
• 2. Intranet VPN ???????????????????????????????
  VPN ?????????????????????????????? ????
  ????????????????????? ????????????????????????????
  ? ??????????? ????????????? ????????? ????????
  ?????????????????? ??????? ?????????????????????
  ??????????????? ?????? ????????????????
  ???????????????????????? ???????????????
  ??????????????? ???????? VPN ???????????????????
• 3. Extranet VPN ???????????????????????????????
  ??????????? Intranet VPN ???????????????????
  ?????????????? ???????????? ?????????????
  ??????????????????????? ??????????????????
  ????????????????? VPN ???????????
  ???????????????????????? ?????????????????????????
  ? ??????????? ?????????????? ???????????????? VPN
  ????????????????????? ???????? ???????
  ?????????????????????? ????????? ???????????
  ?????????????? ????????????????????

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???????????????????? VPN

• ??????????? ?????????????????????? VPN
  ???????????? ????????????????? ???????????????????
  ???? ???????????????? ??????????????? ?????????
  VPN ???????? ??????????????? ???????
  ????????????????????????? ??????????? ??????????
  ?????????????????? ????????? ?????????????????????
  ??????????????????????? ????????? ?????????????
  VPN ????????? ??????????????? ????????????????
  ???? ???????????????? ??????? ?????????????
  ???????? ???????????????????????? ????????????
  VPN ?????????????????????? ??????????
  ???????????????? ?????????????????
  ???????????????????

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VPN Tunneling Protocol

• PPTP (Point to Point Tunneling Protocol)
• L2TP (Layer 2 Tunneling Protocol)
• IPSec (IP Security) ????????????????????? Layer 3
• SSL/TLS ????????????????????? Layer 4
  ??????????????? SSL

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VPN (tun/tap)

• VPN ??? tun/tap ?????? OpenVPN ,Vtune ,tinc ???
  CIPE
• ?????????????????????????? OpenVPN ????????
  ???????? Open Source VPN ?????????????????? SSL (
  Secure Socket Layer ) ????????????????????????????
  ????????????????????????????? SSL
  ??????????????????????????????????????????????????
  ?????????????????????????????? Linux, Windows XP,
  Windows Vista ,OpenBSD, FreeBSD, Mac OS, ???
  Solaris

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OpenVPN

• OpenVPN ???? OpenSource SSL VPN
  ??????????????????????????????????????????????????
  ???? Remote Access, Site-to-Site, Wi-Fi Security
  ????????????????????????? ???????
  ??????????????????????????? ??????? OpenVPN
  ??????????????????????????????????????
  ???????????? UDP ( User Datagram Protocol )

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OpenVPN
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Network Diagram
User
125.27.65.223
202.28.0.0
BUU
UniNet
ThaiLIS
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Network Diagram
User
VPN
125.27.65.223
202.28.0.0
BUU
VPN Client
UniNet
202.28.11.11
VPN Server
ThaiLIS
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BUU-VPN

• VPN Server (For Student)
• VPN Client (Student)
• WWW , SSH

• VPN Server (For Staff)
• VPN Client (Staff)
• WWW, SSH,
• Remote Desktop,
• File Sharing

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VPN Server

• CPU Intel Pentium 4 1.8 GHz
• RAM 1 GB
• NIC 10/100 Mbps
• Hard disk 36 GB
• OS Linux CentOS 5.0
• Software openvpn-2.0.9-1.el5.rf.i386.rpm
• PAM Authentication (AD and OpenLDAP)

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VPN Client

• OS Windows XP SP2
• ????????????? ?????????? staff-vpn-buu-xp.exe
• ??????????? student-vpn-buu-xp.exe

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VPN Client

• OS Windows Vista
• openvpn-2.1_rc7-install_vista.exe
• ????????????? ?????????? config-staff.zip
• ??????????? config-student.zip
• config-xxx.zip ca.crt , client.crt , client.key
  , client.ovpn

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??????????????????? VPN Client

• http//vpn.buu.ac.th

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??????????????????? VPN Client

• ??????????????? VPN ??????????????????????????????
  ??????????????????????????????????
  ?????????????????? VPN ???????????????????????????
  ??????????????????????????????????????????
• ???????????? VPN ?????????????????????????????????
  ???????????????????? ???? ????????????????????????
  ????????????????????????????? , ???????????? ???
  Download ????????????????? ??????????? ,
  ??????????????????????? E-Journal ???????
• ??????????????????????????????????????????????????
  ???????????????????? (Username and Password)
  ????????????????????????? ????????????????

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??????????????????? VPN Client

• ????????????????????????????????????? Windows XP
  ???? Vista ???????????????????????????????
  Administrator ??????????????????????????
• ???????????????????????????????? VPN
  ??????????????????????????????????????????????????
  ???????
• ??????????????????????????????????????????????????
  ??????????????????????????????????????????????????
  ??????? ?????????????????????? ???????????????????
  ????????????????????? ??????????????
  ???????????????? ???????????????? E-mail
  vpn_at_buu.ac.th

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??????????????????? VPN Client ?? Windows XP

• ???????????? http//vpn.buu.ac.th
• ????????????????????????????? http//vpn.buu.ac.t
  h/download/student-vpn-buu-xp.exe
• ?????????????????????????????????????????
  http//vpn.buu.ac.th/download/staff-vpn-buu-xp.exe
  
• ????? Save File ???????????????????????????
  ?????????????????????????????????????????

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??????????????????? VPN Client ?? Windows Vista

• ???????????? http//vpn.buu.ac.th
• ??????? VPN Client ?? Windows Vista
  openvpn-2.1_rc9-install.exe
• Config File ??????????????? Windows Vista
  config-student-vista.zipconfig-staff-vista.zip
• ????? Save File ???????????????????????????
  ?????????????????????????????????????????

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????????????? VPN
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????????????? VPN

• http//whatismyip.com

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????????????? VPN

• http//dcms.thailis.or.th/dcms

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????????????? VPN
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???????????????? VPN
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???????????????? VPN
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???????????????? VPN
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???????????????

• ? Username and Password ?
• ???????????? Username , Password
  ?????????????????????????
• ???????? Username ???????? Username ????????????
  LAB ??????????????????? ????????????? 51111234
  ????? Username 51111234
• ???????????????????? Username ???????? E-Mail
  ??????????????????? ???? chatchai_at_buu.ac.th ?????
  Usernamechatchai
• ?????????????????? Login ??????? Password
  ?????????????? Username Password
  ??????????????????? ???? 101

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???????????????

• ???????????????????????????????? VPN
  ??????????????????
• ?????????????????????????????????????????
• Firewall ????????? ???? Personal Firewall
• Virus, Worm

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??????????jettanan_at_buu.ac.th