Advanced Linux Firewall Workshop
¨Ø´»ÃÐʧ¤ì¢Í§ËÅÑ¡ÊÙµÃ
- à¾×èÍãËéà¡Ô´¤ÇÒÁà¢éÒ㨶֧ËÅÑ¡¡Òà ·ÄÉ®ÕáÅÐá¹Ç»¯ÔºÑµÔà¡ÕèÂǡѺ¡Ò÷ӧҹ¢Í§ä¿ÃìÇÍÅÅì
- à¾×èÍãËéÊÒÁÒöÍ͡ẺµÔ´µÑé§ ºÃÔËÒèѴ¡ÒÃáÅÐá¡é䢻ÑËÒÃкºä¿ÃìÇÍÅÅìã¹à¤Ã×Í¢èÒÂä´é
- à¾×èÍãËéÊÒÁÒö¹Ó¤ÇÒÁÃÙé·Õèä´éä»ãªéÈÖ¡ÉÒÃкºä¿ÃìÇÍÅÅìä´éã¹Í¹Ò¤µ
|
·Ò§Ê¶ÒºÑ¹Ï ¢Íá¨é§ãËé·ÃÒºÇèÒÃÒ¤Ò¤èÒͺÃÁ·Ø¡ËÅÑ¡ÊٵèлÃѺÃÒ¤ÒÊÙ§¢Öé¹ »ÃÐÁÒ³ 5 - 10% ã¹»Õ 2555
|
¤Ø³ÊÁºÑµÔ¢Í§¼Ùéà¢éÒÃѺ¡ÒÃͺÃÁ
¨ÐµéͧÁÕ»ÃÐʺ¡Òóì¡Òä͹¿Ô¡à«ÔÃì¿àÇÍÃ쪹ԴµèÒ§æ º¹Ãкº»¯ÔºÑµÔ¡ÒÃÅչء«ì´éǤÓÊÑè§áºº¤ÍÁÁÒ¹´ìäŹì
¤ÇÃÁÕ¤ÇÒÁÃÙé ¤ÇÒÁà¢éÒã¨àº×éͧµé¹à¡ÕèÂǡѺ¡ÒÃÃÑ¡ÉÒ¤ÇÒÁ»ÅÍ´ÀÑÂã¹Ãкº¤ÍÁ¾ÔÇàµÍÃìáÅÐÃкºà¤Ã×Í¢èÒÂ
ÁÕ¤ÇÒÁÃÙéà¡ÕèÂǡѺâ»ÃⵤÍÅ TCP/IP áÅÐÃкºà¤Ã×Í¢èÒ¤ÍÁ¾ÔÇàµÍÃì
ÁÕ»ÃÐʺ¡Òóì㹡ÒÃãªé§Ò¹¤ÓÊÑè§ iptable ã¹áºº filter áÅÐ NAT ÁÒ¡è͹
|
ÃÐÂÐàÇÅҽ֡ͺÃÁ
¨Ó¹Ç¹ 20 Hrs. àÇÅÒ 9.00 - 17.00 ¹. Çѹ¸ÃÃÁ´Ò ËÃ×Í ÇÑ¹ÈØ¡Ãì - àÊÒÃì - ÍÒ·ÔµÂì ÃÇÁ 3 Çѹ
|
ÊÔè§·Õè¼Ùéà¢éÒͺÃÁ¨ÐµéͧàµÃÕÂÁÁÒ㹡ÒÃͺÃÁ
Note book à¾×èÍ·´Êͺà»ç¹ Client ÁÕ·ÕèÁÕ Ethernet port
|
¨Ó¹Ç¹¼Ùéà¢éÒͺÃÁ
¨Ó¡Ñ´¨Ó¹Ç¹¼Ùéà¢éÒͺÃÁ 10-11 ¤¹/¡ÅØèÁ à¾×èͤسÀÒ¾·Õè´Õ¡ÇèÒ
|
¤Ø³ÊÁºÑµÔ¢Í§ÇÔ·ÂÒ¡Ã
ÇÔ·ÂÒ¡Ã : Í.¸ÕÃÀÑ·Ã Á¹µÃÕÈÒʵÃì ( LPIC-1, LPIC-2,LPIC-3,LCP, RHCE score 96.67%)
|
¼Ùéà¢éÒÃѺ¡ÒÃͺÃÁ¨Ðä´éÃѺ
- ¤ÙèÁ×Í»ÃСͺ¡ÒÃͺÃÁ àÃÕºàÃÕ§â´Â·ÕÁ§Ò¹ MyComputer Training Center
- ãªé IP ¨ÃÔ§ 1 IP /1 ·èÒ¹ áÅÐ Domain ¨Ãԧ㹡Òý֡ͺÃÁ
- ½Ö¡»¯ÔºÑµÔ¨ÃÔ§¡Ñºà¤Ã×èͧ Server 1 ¤¹/1 à¤Ã×èͧ áÅÐ 1 Client
- ÍÒËÒÃÇèÒ§ ªèǧàªéÒáÅЪèǧºèÒ ÍÒËÒáÅÒ§Çѹ ( ẺºØ¿à¿è )
- ºÃÃÂÒ¡ÒÈ㹪èǧàºÃ¤¨Ð¼è͹¤ÅÒ´éÇ¡ÒêÁ ÊÒä´Õ ÀҾ¹µì ¢èÒÇÊÒà ¡ÕÌÒ áÅФÇÒÁºÑ¹à·Ô§ ¨Ò¡ True Vision Cable TV
|
¡ÒÃàºÔ¡¤èÒãªé¨èÒÂàÃ×èͧ¡ÒÃͺÃÁ
ºÃÔÉÑ· ¹ÔµÔºØ¤¤ÅÊÒÁÒöãªéÊÔ·¸Ôìä´éÃѺ¡àÇé¹ÀÒÉÕã¹ÍѵÃÒ 200% ÍèÒ¹ÃÒÂÅÐàÍÕ´..... ¤ÅÔê¡
˹èÇÂÃÒª¡ÒÃÊÒÁÒöàºÔ¡ä´éµÒÁÃÐàºÕº¢Í§Êӹѡ§º»ÃÐÁÒ³
|
à¹×éÍËҢͧËÅÑ¡ÊÙµÃ
| Part I - Fundamental Conceptual and Skill Improvement
|
|

à¹×éÍËÒÊèǹ¹Õé¨ÐÊÃéÒ§¤ÇÒÁÃÙé·Ñé§´éÒ¹·ÄɯáÅФÇÒÁÊÒÁÒö·Ñ¡ÉСÒû¯ÔºÑµÔ§Ò¹·Õèà¡ÕèÂÇ¢éͧ¡Ñº¡ÒÃÍ͡Ẻ ŧÁ×͵ԴµÑé§áÅФ͹¿Ô¡Ãкºä¿ÃìÇÍÅÅì â´Âà¹é¹·ÕèËÅÑ¡¡ÒÃá¹Ç¤Ô´·Õèà»ç¹Ãкº «Öè§à»ç¹»Ñ¨¨ÑÂÊӤѵèÍ¡ÒûÃÐÂØ¡µìãªé§Ò¹ ¡ÒÃÇÔà¤ÃÒÐËìÍ͡ẺÃкº ¡ÒÃÇÔ¹Ô¨©Ñ»ÑËÒ áÅСÒÃÈÖ¡ÉÒà¡ÕèÂǡѺ෤â¹âÅÂÕä¿ÃìÇÍÅÅìã¹Í¹Ò¤µµèÍä»
·ÄÉ®Õ á¹Ç¤Ô´ÊÓ¤Ñ ËÅÑ¡¡Ò÷ӧҹ¢Í§ä¿ÃìÇÍÅÅìáÅÐ iptables ËÅÑ¡»¯ÔºÑµÔ·Õè¹Óä»ÊÙè¢Ñ鹵͹Áҵðҹ㹡ÒôÓà¹Ô¹¡ÒÃà¡ÕèÂǡѺ¡ÒáÓ˹´¹âºÒ áÅÐà§×è͹䢢ͧä¿ÃìÇÍÅÅì ÃÇÁä»¶Ö§¢éͨӡѴµèÒ§æ ·Õè¤ÇÃÃÐÁÑ´ÃÐÇѧ¢³Ð»¯ÔºÑµÔ§Ò¹¡ÑºÃкºä¿ÃìÇÍÅÅì
ÈÖ¡ÉÒ¤ÓÊÑè§¡Ó˹´¹âºÒÂáÅÐà§×è͹䢢ͧ iptables
ÈÖ¡ÉÒ¡Åä¡¡ÒÃÊ×èÍÊÒ÷ÕèÊӤѢͧâ»ÃⵤÍÅ TCP/IP â´Âáºè§ÍÍ¡à»ç¹â»ÃⵤÍÅÂèÍÂæ áÅмšÒ÷ӧҹ¢Í§áµèÅÐ â»ÃⵤÍŹÑé¹â´ÂÅÐàÍÕ´

½Ö¡»¯ÔºÑµÔ¡ÒÃãªé§Ò¹ iptables 㹰ҹРPacket filter à»ç¹¡Ò÷´Åͧ»¯ÔºÑµÔà¾×èͤÇÒÁà¢éÒ㨶֧â¤Ã§ÊÃéÒ§ÀÒÂ㹢ͧÃкº·ÕèªÑ´à¨¹ ¤ÇÒÁÊÑÁ¾Ñ¹¸ìÃÐËÇèҧͧ¤ì»ÃСͺáµèÅÐÊèǹ ¼ÅÅѾ¸ì¢Í§áµèÅФÕÂìàÇÔÃì´ÀÒÂ㹤ÓÊÑè§áÅСÒÃãªé§Ò¹ÍÂèÒ§¶Ù¡µéͧ µÅÍ´¨¹¡ÒöèÒ·ʹá¹Ç¤Ô´ÁÒÊÙè¡Òû¯ÔºÑµÔãËéàË繼ŨÃÔ§
¡ÒÃãªé§Ò¹ Port Scanner
à¾×è͵ÃǨÊͺ·Ñé§¡è͹áÅÐËÅѧ¡Òûéͧ¡Ñ¹´éÇÂä¿ÃìÇÍÅÅì ·Ñé§¡ÒÃãªé§Ò¹»Ã¡µÔáÅÐÍÒÈÑÂà·¤¹Ô¤¾ÔàÈɪ¹Ô´µèÒ§æ 㹡ÒÃáÊ¡¹¾ÍÃìµ
½Ö¡»¯ÔºÑµÔ¡ÒÃãªé§Ò¹ iptables 㹰ҹРStateful Firewall
â´ÂÁÕ¡Ò÷ӧҹẺ Connection Tracking ªèÇÂãËéÁÕ¤ÇÒÁàª×èͶ×͡ѹÃÐËÇèÒ§âÎʵìÊÙ§ÂÔè§¢Öé¹ à¹×èͧ¨Ò¡ÁÕ¡ÒõԴµÒÁ¤ÇÒÁµèÍà¹×èͧµÅÍ´¡Ãкǹ¡ÒõÑé§áµèàÃÔèÁµé¹¨¹ÊÔé¹ÊØ´¡ÒÃÊ×èÍÊÒÃ
âÁ´ÙŤسÊÁºÑµÔàÊÃÔÁ¡ÒÃãªé§Ò¹·ÕèÊӤѢͧ iptables
·Õè¹Í¡à˹×ͨҡ¤Ø³ÊÁºÑµÔËÅÑ¡ ä´éá¡è ¡ÒÃÁÒÃì¡á¿Å¡à¾×èͤǺ¤ØÁẹ´ìÇÔ¸ ¡ÒÃà¡çººÑ¹·Ö¡¡ÒÃâ¨ÁµÕËÃ×ÍÊÔè§á»Å¡»ÅÍÁ ¡ÒèӡѴ¤ÇÒÁ¶Õè¢Í§¡ÒÃâ¨ÁµÕ áÅÐâÁ´ÙŪèÇÂÍӹǤÇÒÁÊдǡ㹡ÒèѴ¡ÒÃᾤà¡çµ
¡ÒÃãªé§Ò¹ iptables ã¹ÅѡɳРbastion host ËÁÒ¶֧¡Òûéͧ¡Ñ¹ÃÑ¡ÉÒ¤ÇÒÁ»ÅÍ´ÀÑÂã¹ÃдѺâÎʵì¼ÙéãËéºÃÔ¡Ò÷ء»ÃÐàÀ· àªè¹ Web Server ,FTP Server ,SQL Server à»ç¹µé¹ «Öè§¶×ÍÇèÒà»ç¹§Ò¹ÃдѺÁҵðҹ·Õè¼ÙéºÃÔËÒÃÃкºµéͧ¨Ñ´ãËéÁÕã¹·Ø¡à«ÔÃì¿àÇÍÃì
½Ö¡¡ÒÃà¢Õ¹ʤÃÔ»µì iptables ´éǵ¹àͧ
«Ö觨ЪèÇÂãËéà¡Ô´¤ÇÒÁà¢éÒ㨷ÕèªÑ´à¨¹ã¹¡ÒùӪش¤ÓÊÑ觢ͧ iptables ä»ãªé§Ò¹¨ÃÔ§ ¡ÒôպÑꡤé¹ËÒ¢éͺ¡¾Ãèͧ¢Í§à§×èÍ¹ä¢ «Öè§ÁÕ»ÃÐ⪹ìÁÒ¡µèÍ¡Ò÷ӤÇÒÁà¢éÒã¨â»Ãá¡ÃÁºÃÔËÒèѴ¡ÒÃä¿ÃìÇÍÅÅìÊÓàÃç¨ÃÙ»ã¹ÅӴѺµèÍä»
|
| Part II - Network Security Infrastructure and Hardened Environment |
  ÈÖ¡ÉÒ¡ÒÃÍ͡ẺÃкºà¤Ã×Í¢èÒÂà¾×èÍãËéÁÕâ¤Ã§ÊÃéÒ§·ÕèàËÁÒÐÊÁ¡ÑºÊÀÒ¾áÇ´ÅéÍÁ¡ÒÃãªé§Ò¹â´Â¤Ó¹Ö§¶Ö§¤ÇÒÁ»ÅÍ´ÀÑÂà»ç¹ÊÓ¤Ñ â´ÂÁØè§à¹é¹ãËé¼Ùé½Ö¡ÍºÃÁä´éŧÁ×Í»¯ÔºÑµÔáÅÐà¢éÒã¨ÊÀÒ¾·Õèá·é¨Ãԧ㹡ÒèѴµÑé§à«ÔÃì¿àÇÍÃì ¡ÒÃàª×èÍÁµèÍáÅСÒèѴà¤Ã×Í¢èÒÂÂèÍÂÀÒÂã¹Í§¤ì¡ÃÍÂèÒ§à»ç¹Ãкº ÊÀÒ¾¨ÓÅͧ·ÕèÊÃéÒ§¢Öé¹µÒÁËÅÑ¡ÊٵùÕé¨ÐªèÇÂãËéà¡Ô´¡ÒÃàÃÕ¹ÃÙéáÅÐàÊÃÔÁ»ÃÐʺ¡ÒóìãËéá¡è¼ÙéͺÃÁà¾×èͤÇÒÁ¾ÃéÍÁ·Õè¨Ð¹Óä»»¯ÔºÑµÔ§Ò¹¨ÃÔ§ÍÂèÒ§ä´é¼Å
·ÄÉ®ÕáÅÐËÅÑ¡¡Ò÷ӧҹ¢Í§ NAT áÅÐ DMZ
ÈÖ¡ÉÒ¡Ò÷ӧҹ¢Í§ NAT ( Network Address Translation ) ã¹ÅѡɳеèÒ§æ ä´éá¡è SNAT áÅÐ DNAT â¤Ã§ÊÃéÒ§à¤Ã×Í¢èÒÂã¹ÃٻẺ¢Í§ DMZ ( Demilitarized Zone ) ẺµèÒ§æ ¾Ô¨ÒóҢéÍ´Õ¢éÍàÊÕ áÅТéͨӡѴ¢Í§â¤Ã§ÊÃéÒ§áµèÅЪ¹Ô´
¡ÒõԴµÑé§à¤Ã×èͧ¾Õ«ÕÅչء«ìà»ç¹ Firewall / Router
à»ç¹¢Ñ鹵͹¾×é¹°Ò¹ÊÓ¤Ñà¾×èÍ¡Òä͹¿Ô¡à¤Ã×èͧ¾Õ«Õà»ç¹àÃéÒàµéÍÃìáÅÐä¿ÃìÇÍÅÅì ä´éá¡è ¡ÒÃà¾ÔèÁáŹ¡ÒÃì´ ¡ÒÃà»Ô´¤Ø³ÊÁºÑµÔ´éÒ¹ IP Forwarding áÅÐ ¡ÒúÃÔËÒà Kernel Routing Table
¡ÒÃÊÃéÒ§ DMZ Ẻ Semi-safe
à»ç¹ÃٻẺ¢Í§ DMZ ·Õèà¹é¹¤ÇÒÁ»ÃÐËÂÑ´áÅЧèÒµèÍ¡ÒúÓÃØ§ÃÑ¡ÉÒ ¡Ò÷´Åͧ¹Õé¨ÐªèÇÂãËéà¡Ô´¤ÇÒÁà¢éÒã¨áÅÐÊÃéÒ§·Ñ¡ÉТÑé¹¾×é¹°Ò¹ä´éÍÂèÒ§ÃÇ´àÃçÇ·ÕèÊØ´
¡ÒÃ·Ó Virtual Server äÇéàº×éͧËÅѧä¿ÃìÇÍÅÅì
à»ç¹¡ÒûÃÐÂØ¡µì¡Ò÷ӧҹẺ DNAT à¾×èÍʹѺʹع¡Òëè͹à¤Ã×èͧà«ÔÃì¿àÇÍÃìäÇéàº×éͧËÅѧä¿ÃìÇÍÅÅì «Öè§à»ç¹·Õè¹ÔÂÁÊÙ§àÁ×è͹ÓÁÒãªé§Ò¹ÃèÇÁ¡Ñºà¤Ã×Í¢èÒª¹Ô´ºÃʹẹ´ì㹻Ѩ¨ØºÑ¹

¡ÒÃÊÃéÒ§ DMZ Ẻ three prongs firewall
à»ç¹â¤Ã§ÊÃéÒ§¢Í§ DMZ ·ÕèÊÁºÙóìẺ ÁÕ»ÃÐÊÔ·¸ÔÀÒ¾áÅлÃÐÊÔ·¸Ô¼ÅµÃ§µÒÁ¤ÇÒÁµéͧ¡ÒÃÁÒ¡·ÕèÊØ´ àËÁÒСѺÊÀÒ¾áÇ´ÅéÍÁã¹Í§¤ì¡ÃÊèǹãËè áÅЧèÒµèÍ¡ÒôÙáźÓÃØ§ÃÑ¡ÉÒ
¡ÒÃãªé§Ò¹Ê¤ÃÔ»µìÊÓàÃç¨ÃÙ»à¾×èÍÊÃéÒ§à¤Ã×èͧ¾Õ«ÕÅչء«ìà»ç¹ä¿ÃìÇÍÅÅì
ÃٻẺ¢Í§¤ÇÒÁµéͧ¡ÒÃãªé§Ò¹ä¿ÃìÇÍÅÅìâ´Â·ÑèÇä»ÁÑ¡ÁÕ¤ÇÒÁ¤ÅéÒ¤ÅÖ§¡Ñ¹à»ç¹ÊèǹãËè ´Ñ§¹Ñ鹡ÒùÓʤÃÔ»µìÊÓàÃç¨ÃÙ»ÁÒãªé§Ò¹¨Ö§à»ç¹¡ÒÃÅ´ÀÒÃÐ ÃÐÂÐàÇÅÒáÅФÇÒÁ¼Ô´¾ÅҴŧä´éÁÒ¡ ÍÂèÒ§äáçµÒÁ¡ÒùÓʤÃÔ»µìÊÓàÃç¨ÃÙ»ÁÒãªé¹Ñé¹Âѧ¤§µéͧÍÒÈѤÇÒÁÃÙé¤ÇÒÁà¢éÒ㨢ͧ¼ÙéºÃÔËÒÃÃкºà»ç¹ÊÔè§ÊÓ¤Ñ
|
| Part III - Advanced Administering with Performanced Tools and Applications |
  ã¹ÊÀÒ¾¢Í§¡ÒùÓä»ãªé§Ò¹¨ÃÔ§ ¼ÙéºÃÔËÒÃÃкºà¤Ã×Í¢èÒ¨Óà»ç¹ÍÂèÒ§ÂÔè§·Õè¨ÐµéͧÁÕà¤Ã×èͧÁ×Í·ÕèÁÕ»ÃÐÊÔ·¸ÔÀҾʹѺʹع¡ÒúÃÔËÒèѴ¡ÒÃÃкº à¾×èͤÇÒÁÊдǡáÅÐà¾ÔèÁ»ÃÐÊÔ·¸ÔÀÒ¾ÂÔè§¢Öé¹ ¹Í¡¨Ò¡¹ÕéÂѧàÊÃÔÁ´éÇÂà·¤â¹âÅÂÕ·Õè¹èÒʹã¨áÅÐàËÁÒÐÊÁ¡Ñº¡ÒÃãªé§Ò¹ã¹ÊÀÒ¾»Ñ¨¨ØºÑ¹ÍÕ¡´éÇÂ
¡ÒÃãªéà¤Ã×èͧÁ×ͺÃÔËÒèѴ¡ÒÃä¿ÃìÇÍÅÅìµÃǨÊͺÇÔà¤ÃÒÐËìáÅÐÃÒ§ҹ ( Log Analyzer )
ÈÖ¡ÉÒÇÔ¸Õ¡ÒÃàµÃÕÂÁÃкºà¾×èÍʹѺʹع¡ÒÃÃÒ§ҹ¼Å¡Ò÷ӧҹ¢Í§ iptables ¡Òä͹¿Ô¡Í§¤ì»ÃСͺàÊÃÔÁãËéá¡èâÎÊµì ¡ÒõԴµÑé§áÅÐãªé§Ò¹â»Ãá¡ÃÁà¤Ã×èͧÁ×ÍÇÔà¤ÃÒÐËìáÅÐÃÒ§ҹ·Õèà»ç¹«Í¿µìáÇÃìâÍà¾è¹«ÍÃìÊ
¡ÒÃà¡çººÑ¹·Ö¡à˵ءÒóì·ÕèÃÒ§ҹ¨Ò¡ä¿ÃìÇÍÅÅìäÇéã¹Ãкº°Ò¹¢éÍÁÙÅ MySQL
ÇÔ¸Õ¡ÒõԴµÑé§ãªé§Ò¹«Í¿µìáÇÃìÇÔà¤ÃÒÐËìáÅÐÃÒ§ҹ¼Å¡Ò÷ӧҹ¢Í§ä¿ÃìÇÍÅÅìËÅÒ¡ËÅÒÂÃٻẺ·Õè«Ñº«é͹¢Öé¹â´Âãªé¡ÒèѴà¡çº¢éÍÁÙÅäÇéã¹Ãкº°Ò¹¢éÍÁÙÅ áÅйÓàʹ͢éÍÁÙżèÒ¹àÇ纺ÃÒÇà«ÍÃìÍÂèÒ§ÊǧÒÁáÅÐÊдǡµèÍ¡ÒÃá»Å¼Å
ÈÖ¡ÉÒà·¤â¹âÅÂբͧ Bridging Level Firewall
¡ÒèӡѴËÃ×Í¡Ãͧ´éÇÂà§×è͹䢷Õèà»ç¹µÑÇá»Ã¢Í§ä;ÕáÍ´à´ÃÊà¾Õ§ÍÂèÒ§à´ÕÂÇÍÒ¨ÐäÁèàËÁÒÐÊÁ¡Ñºà¤Ã×Í¢èÒ·Õèà»ç¹ Dynamic IP Address ¡ÒèѴ¡ÒôéÇÂÍØ»¡Ã³ì Bridge «Öè§·Ó§Ò¹ã¹ÃдѺ OSI Layer 2 ¨Ö§à»ç¹·Ò§ÍÍ¡·ÕèÃÑ´¡ØÁÁÒ¡¡ÇèÒ
¡ÒÃÊÃéÒ§áÅкÃÔËÒà Level 2 Firewall ´éÇÂÅչء«ì
¡ÒûÃÐÂØ¡µìãªéÅչء«ìàÃéÒàµÍÃìãËé·Ó˹éÒ·Õèà»ç¹ Bridge à»ç¹ÍÕ¡á¹Ç·Ò§Ë¹Öè§·Õè¹èÒʹ㨠áÅÐÁÕ»ÃÐÊÔ·¸ÔÀÒ¾ÊÙ§ äÁèÇèÒ¨Ðà»ç¹¡Ò÷ӧҹÃдѺ MAC Address «Öè§ÁÕ¤ÇÒÁàÃçÇÊÙ§ËÃ×Í¡ÒúÅê͡੾ÒÐà¤Ã×èͧËÃ×ÍáÁé¡ÃзÑè§¡Òà NAT ã¹ÃдѺÎÒÃì´áÇÃì

ÈÖ¡ÉÒá¹Ç¤Ô´áÅÐËÅÑ¡¡Òâͧ VPN ( Virtual Private Networking )
¡ÒÃÊ×èÍÊÒôéǪèͧ·Ò§Ê×èÍÊÒ÷ÕèÁÕ¡ÒÃà¢éÒÃËÑÊä´é¡ÅÒÂà»ç¹Êèǹ˹Öè§ã¹¹âºÒ¡ÒÃÃÑ¡ÉÒ¤ÇÒÁ»ÅÍ´ÀÑ â´Â੾ÒÐã¹Âؤ¢Í§ÍÔ¹àµÍÃìà¹çµºÃʹẹ´ìáÅСÒÃÊ×èÍÊÒÃäÃéÊÒÂàªè¹·Ø¡Çѹ¹Õé VPN ¨ÐªèÇÂãË館³à¢éÒÊÙèà¤Ã×Í¢èÒ¢ͧÊӹѡ§Ò¹¢Í§¤Ø³ä´é¨Ò¡·Ø¡ÁØÁâÅ¡ÀÒÂãµé¡ÒÃÃÑ¡ÉÒ¤ÇÒÁ»ÅÍ´ÀÑ´éÇÂä¿ÃìÇÍÅÅì
¡ÒÃÊÃéÒ§Ãкº VPN ´éÇÂÅչء«ìáÅЫͿµìáÇÃìâÍà¾è¹«ÍÃìÊ
ÈÖ¡ÉÒà·¤â¹âÅÂÕ VPN 㹻Ѩ¨ØºÑ¹ à»ÃÕºà·Õº¨Ø´à´è¹¨Ø´´éÍ áÅЫͿµìáÇÃìáÍ»¾ÅÔपÑè¹·ÕèÁÕãËéàÅ×Í¡ãªéÍÂèÒ§àËÁÒÐÊÁ ŧÁ×Í»¯ÔºÑµÔ¡ÒõԴµÑé§ áÅкÃÔËÒèѴ¡ÒÃÃкº VPN Server º¹Åչء«ì ·´Åͧãªé§Ò¹¨ÃÔ§¼èÒ¹âÁà´çÁáÅÐ ADSL ¤ÇÒÁàÃçÇÊÙ§
|