  (SYN ⤫ɸ)
  ̤ TCP/IP ͥåȥ SYN ѹˤ餵Ƥ
  ޤΡ֥ӥ̵ˤ׹Ƥ֤
  桼³Բǽˤʤޤ⤴ñˡǥ
  ͥåȤΤɤǤ⹶⤵ΤǤ

  SYN cookies ϤμιؤɸʤͿޤ Y 
  ȡTCP/IP å "SYN cookies" ȤΤ
  Ź沽줿󥸥ץȥȤäơˤ餵
  ֤Ǥ桼³³褦ˤޤ桼
  ȤäƤ TCP/IP ץѹɬפϤޤ
  SYN cookies ϤΤ褦ʥץफ鸫ʤ褦˵ǽ
  ΤǤSYN cookies εŪ
  ftp://koobera.math.uic.edu/syncookies.html 򸫤ƤߤƤ
  

  ʤ SYN ѹ硢ͥ𤹤
  긵ɥ쥹ϹԤε¤ΤǤ礦ñ˼º
  긵ɥ쥹ޤǥѥåȤפ뻲ͤȤ𤵤
  ǤꡢФΤȹͤƤϤޤ

  Ф˲٤ʾ֤ǤϡSYN cookies ȤȤǥ
  饤ȤΥ顼𤹤뤳Ȥ˸Ƥޤ
  ޤ󡣤Τ褦ʤȤˤ˵褦ǤСε
  ǽȤʤ褤Ǥ礦

   Y Ƥ⡢ SYN cookies ǽͭˤ
  ʤޤ󡣸˽ФƤ "/proc filesystem support"  
  "Sysctl support" ˤ Y ֡Ȼ proc ե륷
  ƥबޥȤ줿

    echo 1 >/proc/sys/net/ipv4/tcp_syncookies

  Ȥޥɤ¹Ԥޤ

  褯ʬʤʤ Y Ƥ

  <, 翹ݡ (2.2.14 )>
