À¥ ¼¹ö¿¡ ÇѰè ÃÖ´ë TCP ¿¬°á
Windows XP SP2¿Í â ºñ½ºÅ¸¿¡¼´Â, ¸¹Àº »ç¿ëÀÚ´ÂÀ» ã°í ÀÖ´Ù tcpip.sys¿¡ ÀÇÇÏ¿© ±â¿öÁö´Â Àü¼¼ ¸¶Â÷ ¶Ç´Â ÀÚµ¿ patcher Àú°ÍÀº »ó°è¿¡ TCP/IP¸¦ ¹Ý ¿¬´Ù µ¿½Ã ¿¬°á ÇѰ踦 ÀÚ¹°¼è·Î ¿¬´Ù. ÀÎÅͳݿ¡ µå·¯³»´Â À¥ ¼¹ö¿¡¼´Â Çѹø¸¸ Çã¿ëµÇ´Â À¥ ¼¹ö¿¡ TCP µé¾î¿À´Â ¿¬°áÀÇ ÃÖ´ë ¼ýÀÚ¸¦ Á¦ÇÑÇϰí Á¦ÇÑÇÏ´Â Çʿ䰡 ÀÖÀ»Áöµµ ¸ð¸£´Ù °÷¿¡, Á¤¹Ý´ë´Â Áø½ÇÇÒÁöµµ ¸ð¸¥´Ù.
À¥ ¼¹ö¿¡ ÃÖ´ë µé¾î¿À´Â TCP À¥ ¿¬°áÀ» Á¦ÇÑÇÏ´Â °ÍÀº ¾ÆÁ÷µµ ¸·°Å³ª ³ª¾ÆÁö°Ô À¯¿ëÇÏ´Ù, Á¤Áö DDoS (ºÐ¹èµÈ ¼ºñ½º °ÅºÎ) ¶Ç´Â DoS (¼ºñ½º °ÅºÎ) °ø°Ý. DDoS °ø°ÝÀº ½Ã½ºÅÛ ÀÚ¿ø °ÅâÇÑ ¾çÀ» ¼Ò¸ðÇÒ ¼ö ÀÖ°í CPU ÁüÀº Á¤´çÇÑ ¹æ¹®ÀÚ¿¡°Ô, À¥ ÆäÀÌÁö ¼ºù ½Ã°£ ¶Ç´Â ÀÀ´ä ½Ã°£À» °¨¼ÓÇÑ´Ù. ±×¸®°í ³ª»Û ÄÉÀ̽º¿¡¼, °ø°ÝÀº ºñ·Ï ´ç½ÅÀº ±â¾ïÀÇ ´Ù¼ö GBs¸¦ °¡Áø ÀÌÁß qual ÁßÇÙ CPU Àü¿ë ¼¹ö°¡ ÀÖ´õ¶óµµ, À¥ ¼¹ö¸¦ °É°í ¿ÏÀüÇÏ°Ô ²ø¾î³»¸± ¼ö ÀÖ´Ù.
¹æÈ£º® ¶Ç´Â µ¿±â À¯ÈÞ ¹®ÀÚ °úÀÚ »ç¿ë À̿ܿ¡ °ø°Ý ¼ºñ½º °ÅºÎ¿¡ ÀÀ´ä, ¸·±â À§ÇÏ¿©´Â, ¼¹ö°¡ ÃÊ´ç ¹Þ¾ÆµéÀÏ ¼ö ÀÖ´Â TCP ¿¬°áÀÇ ¼ö¸¦ Á¦ÇÑÇÏ´Â °Íµµ °¡´ÉÇÏ. °³³äÀº À¥ ÆäÀÌÁö°¡ digged, ºñƲ°Å·Á ÀÏ ¶§ ¶ÇÇÑ Àû¿ëÇØ ÀÏÁö¸ð¸¥°í ¶Ç´Â farked Á¶¾÷ ´ÜÃà °æ°£¿¡ ÀÖ´Â ´Ù·® ±¸°æ²ÛÀ» °¡Á®¿À´Â. ±×·¯³ª, ÀÌ workaround´Â »ì¾Æ³´Ù' ¿ÏÀüÇÏÁö ¾Ê°Ô ¿¬°áÀÇ ¾öû³ ±Ô¸ð¿¡ ÀÇÇØ¼¸¸ ²ø¾î³»·Á ¼¹ö¸¦' ¸¸µå´Â °ÍÀ» ¿¹Á¤ÇÑ´Ù. ±×¸®°í ±ÝÁö´Â ¼¹ö¿¡ ³Ê¹« Á¢´ëµÈ À¥»çÀÌÆ®¿¡ À¯È¿ÇÑ Àΰ£ ¹æ¹®ÀÚ¿¡ Á¦ÇÑÀÌ ±×°ÍÀÇ °æ°è¸¦ ¸íÁßÇϰí Ȱ¹ßÈ÷ »õ·Î¿î ¿¬°áÀ» ºÎÁ¤ÇÏ´Â °æ¿ì¿¡ Àû¿ëÇÒ °ÍÀÌ´Ù.
ÇàÁ¤°üÀº ÃÊ´ç ¼¹ö¿¡ TCP ¿¬°áÀÇ ¼ö¿¡ ÃÖ´ë Çѵµ¸¦ ¼ö¶ô°¡´ÉÇÑ ¼³Á¤Çϱâ À§ÇÏ¿© iptables¸¦ ÀÌ¿ëÇÒ ¼ö ÀÖ´Ù. ÇѰè, ·Î±×ÀÎÀ» ´ëüÇÏ´Â µÚ¿¡ ¿À´Â ¸í·ÉÀ» ¹þ±â°í ¹ßÇàÇϱâ À§ÇÏ¿© »Ñ¸®·Î Çü¼ºÇϱâ À§ÇÏ¿© <n> ÃÊ´ç ¿¬°áÀÇ ¼ö·Î ´ç½ÅÀº, ³õ°í ½Í´Ù <m> ÇѰ踦 Àû¿ëÇÏ´Â ½ÃÀÛÇÏ´Â u°¡ ¼¹ö¸¦ ¿øÇÏ´Â ¹ö½ºÆ® À²·Î, ºÎ·ù ¾ø´Â µÑ ´Ù.
iptables - nat t -´Â N µ¿±â À¯ÈÞ ¹®ÀÚ ¹ü¶÷ÇÑ´Ù
- m ÇѰè - ÇѰ踦 µ¿±â À¯ÈÞ ¹®ÀÚ ¹ü¶÷ÇÑ´Ù iptables - nat t -´Â <n>/s - ÇÑ°è ÆÄ¿ÇϽʽÿÀ <m> - j ¹Ýȯ
iptables - nat t -´Â - j Ç϶ôÀ» µ¿±â À¯ÈÞ ¹®ÀÚ ¹ü¶÷ÇÑ´Ù
iptables - nat t - PREROUTING - i $EXT_IFACE - d $DEST_IP - p tcp - µ¿±â À¯ÈÞ ¹®ÀÚ - j´Â µ¿±â À¯ÈÞ ¹®ÀÚ ¹ü¶÷ÇÑ´Ù
»ó±âÀÇ ¸í·ÉÀº À¥ ¼¹ö¿¡ ¿¬°áÇÒ ¼ö ÀÖ´Â TCP ¿¬°áÀÇ ÃÖ´ë ¼ýÀÚ¸¦ Á¦ÇÑÇÒ °ÍÀÌ´Ù n ÃÊ´ç ¿¬°á, ÈÄ¿¡ m ¿¬°áÀº ¼³Ä¡µÇ¾ú´Ù. ´ç½ÅÀÌ ³õÀ» ¼ö ÀÖ´Â ¿¬°áÀÇ ¼ö¿¡ Á¶Á¤ ¼ýÀÚ°¡ ¾ø´Ù. If the server is powerful it¡¯s possible to increase the values to handle and accept more connection in order to reduce any drop connections. Try and set the best values for your server.
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July 2nd, 2008 08:24
[...] limit en yüksek derece TCP bağlant©¥ -e doğru örümcek ağ©¥ -e hizmet limit en yüksek derece gelir TCP örümcek ağ©¥ bağlant©¥ -e doğru belgili tan©¥ml©¥k örümcek ağ©¥ -e hizmet etmek bkz. be yararl©¥ -e doğru önlemek ya da daha iyi [...]