³Ý¹ÌÆÃÀ» Áö¿øÇÏ´Â ¶ó¿ìÅÍ(°øÀ¯±â)
À¥ ILS ¼­¹ö       ¶óÀ̺ê¶ó(Libra)     ¸®´ª½º·¦ Ȩ
¾Æ·¡ ±ÛÀº http://www.homenethelp.com/help/netmeeting-router.asp¿¡¼­ ÀÎ¿ë ¹ø¿ªÇÑ °ÍÀÔ´Ï´Ù.

±¤´ë¿ª NAT ±â¹Ý ¶ó¿ìÅÍ¿¡¼­ ³Ý¹ÌÆà 3.0 ¶Ç´Â h.323 »ç¿ëÇϱâ. ¾î¶² ¶ó¿ìÅÍ°¡ °¡´ÉÇÑ°¡?

(Using NetMeeting 3.0 or h.323 through a NAT based broadband router. What routers work?)

¸¶ÀÌÅ©·Î ¼ÒÇÁÆ®»ç°¡ ³Ý¹ÌÆà 3.0À» °³¹ßÇßÀ» ¶§ ±×µéÀº ±âÁ¸ÀÇ h.323 È­»óȸÀÇ ÇÁ·ÎÅäÄÝÀ» »ç¿ëÇϱâ·Î °áÁ¤Çß´Ù.
When Microsoft developed NetMeeting 3.0 they chose to use the existing h.323 video conferencing protocol.

ÀÌ ÇÁ·ÎÅäÄÝÀº Ç¥ÁØ NAT(network address translation) - ´ëºÎºÐÀÇ ÀÎÅÍ³Ý °øÀ¯ ÀåÄ¡¿¡ »ç¿ëµÇ´Â ±â¼ú - ¿Í´Â ÀüÇô ȣȯ¼ºÀÌ ¾ø´Ù..
This protocol happens to be completely incompatible with standard NAT(network address translation) - the technology used for most internet sharing devices.

´ëºÎºÐÀÇ TCP/IP ÀÀ¿ë ÇÁ·Î±×·¥°ú´Â ´Þ¸® ³Ý¹ÌÆÃÀº °íÁ¤ Æ÷Æ®°¡ ¾Æ´Ñ À¯µ¿ Æ÷Æ®¸¦ »ç¿ëÇÑ´Ù. ÀÌ´Â °¢°¢ÀÇ ³Ý¹ÌÆà ¿¬°áÀº ÀÌÀü °ú´Â Á¶±Ý¾¿ ´Ù¸£´Ù´Â °ÍÀÌ´Ù.
Unlike most TCP/IP applications, NetMeeting uses DYNAMIC PORTS instead of STATIC PORTS. That means that each NetMeeting connection is somewhat different than the last.

¿¹¸¦µé¸é HTTP À¥»çÀÌÆ®´Â 80¹ø Æ÷Æ®¸¦ »ç¿ëÇÑ´Ù. ³Ý¹ÌÆÃÀº 6 ¸¸°³ÀÇ Æ÷Æ® Áß ÀÓÀÇÀÇ Æ÷Æ®µéÀ» »ç¿ëÇÑ´Ù.
For instance, the HTTP web site application uses port 80. NetMeeting can use any of over 60,000 different ports.

¹æÈ­º® µÚ¿¡ À¥¼­¹ö¸¦ ³õ´Â ´Ù´Â °ÍÀº ÇÑ °³ÀÇ ÀÛÀº ±¸¸ÛÀ» ¶Õ´Â °ÍÀÌ´Ù. ¹æÈ­º® µÚ¿¡ ³Ý¹ÌÆà ÄÄÇ»Å͸¦ ³õ´Â´Ù´Â °ÍÀº 6¸¸ °³ ÀÌ»óÀÇ Æ÷Æ®¸¦ ¿­¾î ³õ´Â °ÍÀÌ´Ù.(³Ý¹ÌÆÃÀÌ µÇ°ÔÇÏ·Á¸é) - º¸¾ÈÀûÀ¸·Î ¾Ç¸ù°úµµ °°´Ù. (¸¶ÀÌÅ©·Î ¼ÒÇÁÆ®ÀÇ ³Ý¹ÌÆÃ/ÆÄÀ̾î¿ù ³ëÆ®¸¦ º¸¶ó)
Putting a web server behind a firewall means opening a single small hole. Putting a NetMeeting computer behind a firewall means opening over 60,000 ports - a security nightmare. (see Microsoft's NetMeeting / Firewall notes here

Ç¥ÁØ NAT¸¦ »ç¿ëÇÏ´Â ¸ðµç ±¤´ë¿ª ¶ó¿ìÅÍ ¹× Ç¥ÁØ NAT¸¦ »ç¿ëÇÏ´Â ¸¶ÀÌÅ©·Î ¼ÒÇÁÆ®ÀÇ ICS(ÁÖ : Internet Connection Sharing) °°Àº ÀÎÅÍ³Ý °øÀ¯ ÇÁ·Î±×·¥Àº ³Ý¹ÌÆÃÀ̳ª h.323 ÆÐÅ°Áö¿¡¼­´Â ÀÛµ¿ÇÏÁö ¾Ê´Â´Ù.
All broadband routers using (only) standard NAT and all internet sharing programs like Microsoft ICS that use (only) standard NAT will NOT work with NetMeeting or other h.323 software packages.

  • ÇØ°áÃ¥ 1 - DMZ
    SOLUTION #1 - The DMZ

    ¸¸¾à DMZ¸¦ Áö¿øÇÏ´Â ±¤´ë¿ª ¶ó¿ìÅÍ(°øÀ¯±â)³ª °ÔÀÌÆ®¿þÀ̸¦ °®°í ÀÖ´Ù¸é ÇÑ ´ëÀÇ ÄÄÇ»Åͼ­ ³Ý¹ÌÆÃÀ» »ç¿ëÇÒ ¼ö ÀÖ´Ù. (ºñµð¿À/À½¼º ¼Û¼ö½ÅÀÌ ´Ù µÇ´Â°ÍÀ» ¸»ÇÔ.) ¿ì¼± ±× ÇÑ´ëÀÇ ÄÄÇ»ÅÍ¿¡ °íÁ¤ IP(»ç¼³ IP : ¿¹ 192.168.1.2)¸¦ ºÎ¿©Ç϶ó. ±×¸®°í³ª¼­ ±× IP¸¦ ¶ó¿ìÅÍ(°øÀ¯±â)ÀÇ DMZ¿¡ ÁöÁ¤Ç϶ó. ¸ðµç ¶ó¿ìÅÍ´Â ÀÌ ºÎºÐ ¼³Á¤ ¹æ¹ýÀÌ ´Ù¸£¹Ç·Î ¼³Á¤ ¹æ¹ý¿¡ ´ëÇؼ­´Â µµ¿òÀ» ÁÙ ¼ö ¾ø´Ù.
    If you have a broadband router or broadband gateway that supports a DMZ you can get NetMeeting working on ONE computer. First, assign that computer a STATIC IP address in your network. Then set that new IP address in the router's DMZ. All routers will handle this differently so I can't be much help with your particular config.

    ÁÖ:] DMZ´Â ¸ðµç Æ÷Æ®¸¦ DMZ ÄÄÇ»ÅÍ·Î Æ÷¿öµùÇÑ´Ù.(¿ÜºÎ·ÎºÎÅÍÀÇ ¶ó¿ìÅÍ·ÎÀÇ ¿¬°á¿¡ ´ëÇؼ­). DMZ¸¦ ¼³Á¤ÇÏ¸é ¶ó¿ìÅÍ¿¡¼­ÀÇ ´Ù¸¥ Æ÷Æ®Æ÷¿öµù ¼³Á¤ÀÌ ¹«½ÃµÈ´Ù´Â °ÍÀ» ÀǹÌÇÑ´Ù. ³¡À¸·Î ³Ý¹ÌÆà ÄÄÇ»ÅÍ¿¡¼­ ¼ÒÇÁÆ®¿þ¾î ±â¹ÝÀÇ ¹æÈ­º®À» »ç¿ëÇÒ ¼ö ¾ø´Ù. ¹æÈ­º®ÀÌ µé¾î¿À´Â ³Ý¹ÌÆà Ʈ·¡ÇÈÀ» ¸·±â ¶§¹®ÀÌ´Ù.(Áï Çǽÿ¡ ¹æÈ­º® ÇÁ·Î±×·¥À» »ç¿ëÇÏÁö ¸»¶ó´Â ¶æÀÌ´Ù.)
    Note: A DMZ forwards ALL ports to the DMZ computer. This makes that computer susceptible to attacks from the outside world. This also means that a DMZ overrides all other port forwarding commands set up in your router. Lastly, running a software based firewall on your NetMeeting computer will not work because the firewall will usually block incoming NetMeeting traffic!

    ¿ªÀÚ ÁÖ] DMZ¸¦ »ç¿ëÇÏ´Â °æ¿ì¿¡µµ È£ÃâÇÏ´Â ÃøÀº °øÀ¯±â(¶ó¿ìÅÍ)¿¡ ºÎ¿©µÈ IP·Î È£ÃâÇؾßÇÑ´Ù. ³Ý¹ÌÆÃÀÌ ¼³Ä¡µÈ PC¿¡ ºÎ¿©µÈ IP ¾îµå·¹½º¸¦ »ç¿ëÇÏ¸é ¾ÈµÈ´Ù. ³Ý¹ÌÆà PC¿¡ ºÎ¿©µÈ IP´Â »ç¼³ IPÀ̹ǷΠÀÎÅͳݿ¡¼­ ¶ó¿ìÆÃÇÒ ¼ö ¾ø±â ¶§¹®ÀÌ´Ù.

    ¸®´ª½º·¦ÀÇ µð·ºÅ͸® ¼­¹ö¿¡¼­ ¸Ç ¾ÕÀÇ À̸§À» Ŭ¸¯ÇÏ¸é ³Ý¹ÌÆÃÀÌ ¼³Ä¡µÈ PCÀÇ IP¸¦ È£ÃâÇÑ´Ù. ±×·¯¹Ç·Î DMZ°¡ ¼³Á¤µÈ ¶ó¿ìÅÍ/°øÀ¯±âÀÇ ÁּҷΠȣÃâÀ» ÇÏ°Ô ÇÏ·Á¸é CALL_ME ¹öÆ°À» »ç¿ëÇØ¾ß ÇÑ´Ù.

     *. »ç¼³ IP¸¦ »ç¿ëÇÒ °æ¿ì¿¡ ILS ¼­¹öÀÇ »ç¶÷ã±â ¹Ø¿¡ ³ª¿À´Â "±ÍÇÏÀÇ IP Address ´Â ... "¿¡ ³ª¿À´Â ÁÖ¼Ò°¡ °øÀ¯±â/¶ó¿ìÅÍ¿¡ ºÎ¿©µÈ ÁÖ¼ÒÀÌ´Ù.

  • ÇØ°áÃ¥ 2] ³Ý¹ÌÆÃÀ» Áö¿øÇÏ´Â ¶ó¿ìÅÍ
    Solution #2 - Routers with NetMeeting Support

    ¸î¸î Çϵå¿þ¾î ¾÷üµéÀº h.323 ȣȯ¼ºÀ» Á¦°øÇϱâ À§ÇØ ¸î°¡Áö ÇØ°áÃ¥À» °í¾ÈÇß´Ù. ÀÌ´Â ½¬¿î ÀÏÀÌ ¾Æ´Ï´Ù. ¶ó¿ìÅÍ°¡ µé¾î¿À´Â ÆÐŶÀ» ÀÏÀÏÈ÷ °Ë»çÇØ ÀÌ°ÍÀÌ ³Ý¹ÌÆà ÆÐŶÀÎÁö¸¦ ã¾Æ¾ß Çϱ⠶§¹®ÀÌ´Ù. ÀÌ´Â ¶ó¿ìÅÍ°¡ ÇÒ¼ö ÀÖ´Â ¹üÀ§¸¦ ÃÊ°úÇÏ´Â °ÍÀÌ°í ¹æÈ­º®¿¡¼­ Ãë¾àÁ¡À̱⠶§¹®ÀÌ´Ù.
    A few hardware manufacturers have taken it on themselves to actually provide H.323 compatibility. This is not an easy task since the router must search each incoming packet for signs that it might be a netmeeting packet. This is a whole lot more work than a router normally does and may actually be a weak point in the firewall.

    ³Ý¹ÌÆà Áö¿øÀº µÎ °¡Áö ÇüÅ·Π³ª´µ¾î Áø´Ù. ¼Û½ÅÃø Åë°ú¿Í ¼Û¼ö½Å Áö¿øÀÌ´Ù. ¼ö½Å Áö¿øÀº ·£¿¡ ÀÖ´Â ÇÑ ´ëÀÇ Çǽÿ¡¼­¸¸ °¡´ÉÇÏ´Ù. ¼Û½Å Áö¿øµµ ´Ù¾çÇÏÁö¸¸ º¸Åë ÇÑ °³ÀÇ ¼Û½Å ¼¼¼Ç¿¡¸¸ ÇÑÁ¤µÈ´Ù.

    [¿ªÀÚ ÁÖ]
    ¸®´ª½º¿¡¼­ h.323 ¸ðµâÀ» »ç¿ëÇÏ¸é ¸ÖƼ ¼Û¼ö½Å Áö¿øÀÌ µÈ´Ù.

    NetMeeting support seems to come in two flavors. Outgoing pass-through and Outgoing/Incoming support. When incoming support is provided, it is only for a SINGLE netmeeting computer on your LAN. Outgoing support varies but for the most part it is limited to a SINGLE outgoing session.

    ³ª´Â ¸ðµç ¶ó¿ìÅ͸¦ °®°í ÀÖÁö ¾ÊÀ¸¹Ç·Î ¸ðµç ¶ó¿ìÅÍ¿¡ ´ëÇØ Å×½ºÆ®¸¦ ÇØ º¸Áö ¸øÇß´Ù. ¿©±â¿¡ ³Ý¹ÌÆÃÀ» Áö¿øÇÑ´Ù°í ¾²¿©ÀÖ´Â ¶ó¿ìÅ͸¦ ³ª¿­Çß´Ù.
    Since I do not have all of these routers, I was unable to actually test them all for full functionality. Where appropriate, I have listed and linked to where I found documentation on-line stating h.323 / Netmeeting support.

  • ³Ý¹ÌÆÃÀ» Áö¿øÇÏ´Â ¶ó¿ìÅÍ
    Routers with NetMeeting Support

    ¿©±â¿¡ ¿Ã·ÁÁö±â À§Çؼ­´Â, ÃÖ¼ÒÇÑ ¼Û½ÅÅë°ú(passthrough) ±â´ÉÀ» Áö¿øÇØ¾ß ÇÑ´Ù. ´ëºÎºÐÀÇ ¶ó¿ìÅÍ´Â DMZ¸¦ ¼³Á¤ÇÏ¸é ³Ý¹ÌÆÃÀ» Áö¿øÇÑ´Ù. ±×·¯³ª ÀÌ´Â Áö¿øÀ̶ó±â º¸´Ù´Â º¯¸í¿¡ ºÒ°úÇÏ´Ù.
    To be listed here, a router must al LEAST support NetMeeting outbound passthrough. Almost all routers support NetMeeting in a DMZ but that is a sad excuse for 'support'

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