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1. httpd.conf
A. config ¿¡¼ ¼º´É¿¡ ´ëÇÑ ¿ä¼Òµé
i. KeepAlive Off
Çѹø connection ÇÏ¸é ¹Ù·Î connectionÀ» ²÷Áö ¾Ê°í À¯Áö¸¦ ÇÏ´Â ±â´ÉÀε¥ Off¸¦ ÇØ¾ß ´õ ¸¹Àº client µéÀÇ request 󸮸¦ ÇÒ ¼ö ÀÖ´Ù. KeepAlive On »óÅÂÀ̸é MaxKeepAliveRequests, KeepAliveTimeOut °ªÀ» ÀûÀýÈ÷ Á¶ÀýÇØ¾ß µÈ´Ù.
ii. Timeout 30
connection ½ÃÁ¡ºÎÅÍ ¿Ï·á µÉ¶§±îÁöÀÇ ÃÖ´ë ½Ã°£°ª ÀÌ´Ù. network ÀÌ»óÀÌ»ó µîÀ¸·Î connection ȯ°æÀÌ ºñÁ¤ÀûÀÎ client connection µéÀÌ ¸¹¾ÆÁö¸é apache child process »õ connetcion 󸮸¦ À§ÇØ °è¼Ó forkÇÏ°Ô µÉ°ÍÀÌ°í serverÀÇ °úºÎÇÏ°¡ »ý±ä´Ù.
iii. HostnameLookups Off
apache ±âº»°ªÀº Off À̸ç On À¸·Î µÇ¾î ÀÖÀ¸¸é connectionÇÏ°í ÀÖ´Â cilent IP ÁÖ¼Ò°¡ ¿ª ÃßÀûµÇ°í ±× Á¤º¸°¡ log fileµî¿¡ ¾²ÀδÙ. ±×·¸±â ¶§¹®¿¡ ¼º´É¿¡ ÁÁÁö ¾Ê´Ù.
iv. FollowSymLinks
Options FollowSymLinks °¡ ¼³Á¤µÇ¾î ÀÖ´Ù¸é symlinks¿¡ ´ëÇÑ º¸¾È°Ë»ç¸¦ ¼öÇàÇÑ´Ù. symlinks¿¡ ´ëÇÑ º¸¾È°Ë»ç¿¡ µû¶ó¼ ¼º´ÉÀÌ ÁÁÁö ¾Ê°ÔµÇ¸ç ºÒÇÊ¿äÇÑ °æ¿ì¶ó¸é ¼³Á¤ÇÏÁö ¾Ê´Â°Ô ÁÁ´Ù.
v. Options SymLinksIfOwnerMatch
¼³Á¤µÇ¾î ÀÖ´Ù¸é °¢ directory¸¦ ¸ðµÎ Á¡°ËÇؼ °¢°¢ÀÇ lstat system callÀ» ÇÏ°Ô µÇ¹Ç·Î ¼º´ÉÀÌ ÀúÇϵȴÙ.
vi. AllowOverride None
AllowOverride all ·Î ¼³Á¤µÈ°æ¿ì ¸ðµç filename component¿¡ ´ëÇؼ .htaccess fileÀ» ¿°ÔµÈ´Ù. ÀÌ fileÀ» Çѹø´õ ¿°Ô µÊÀ¸·Î¼ ¼º´ÉÀÌ ÁÁÁö ¾Ê°Ô µÇ¸ç ÀÌ°ÍÀÌ ÇÊ¿ä¾ø´Â °æ¿ì¶ó¸é AllowOverride None À» »ç¿ëÇØ¾ß µÈ´Ù.
vii. Negotiation
DirectoryIndex index ó·³ wildcard¸¦ »ç¿ë ÇÏ´Â °Í º¸´Ù DirectoryIndex index.cgi index.pl index.shtml index.html ¿Í °°ÀÌ complete list·Î »ç¿ëÇÏ´Â °ÍÀÌ ÁÁ´Ù. complete list ¿¡¼´Â °¡Àå ¸ÕÀú ¼±ÅõǴ ¼øÀ¸·Î ³ª¿ÇÏ´Â °ÍÀÌ ÁÁ´Ù.
viii. MaxRequestsPerChild 0
apache child process°¡ memory leak ÀÌ ¾ø°í »ç¿ëÀÚ module ·Î ÀÛ¼ºÇÑ ºÎºÐÀÌ °ß°íÇÏ´Ù°í ÆǴܵǸé 0 (unlimited)·Î ¼³Á¤ÇÏ´Â °ÍÀÌ ÁÁ´Ù.
ix. Apache 2.0 Multi-Processing Modules ¿¡ µû¸¥ Process Creation
1. prefork
A. apache 1.3 ÀÇ °è½Â(default) µÈ°ÍÀ̸ç thread ¸¦ Áö¿øÇÏÁö ¾Ê´Â Unix °è¿À» À§ÇØ ³²°ÜµÐ °ÍÀÌ´Ù.
B. MinSpareServers, MaxSpareServers, StartServers Áö½ÃÀÚ¸¦ ÀûÀýÈ÷ Á¶ÀýÇØ¾ß µÈ´Ù.
C. MaxClients ¼ö´Â Client connection ÀÌ ³Ê¹« ¸¹´Ù¸é serverÀÇ spec¿¡ µû¶ó ÀûÀýÇÏ°Ô Á¦ÇÑ ÇØ¾ß ÇÑ´Ù.
2. worker
A. parent ·Î ºÎÅÍ fork µÈ child process´Â °íÁ¤µÈ ¼ýÀÚÀÇ thread ¸¦ °¡Áö°í ÀÖÀ¸¸ç StartServer¿¡ ÁöÁ¤µÈ ¼ýÀÚ ¸¸Å child process »ý¼ºÇÑ´Ù.
B. ThreadPerChild ¿¡ °íÁ¤µÈ ¼ýÀÚ ¸¸Å child process ³» Thread °³¼ö »ý¼º
C. StartServer ¡¿ ThreadPerChild ¼ýÀÚ¸¸ÅÀÇ Thread°¡ Server Start½Ã¿¡ »ý¼ºµÇ°í request¿¡ µû¶ó MaxClient °ª±îÁö Áõ°¡ ÇÑ´Ù.
D. °¢°¢ÀÇ thread µéÀº connectionµéÀÇ listen °ú serve ¸¦ ÇÑ´Ù.
E. request °¡ ´Ã¾î³ª¸é parent ´Â child process ¸¦ fork ÇÏ¿© ThreadPerChild¿¡ ÁöÁ¤µÈ ¼ýÀÚ ¸¸ÅÀÇ thread ¸¦ »ý¼ºÇÑ´Ù. request °¡ ´Ã¾î³ª¸é parent ´Â child process ¸¦ kill ÇÏ¿© child process ³»¿¡ ÀÖ´ø thread¸¦ ÇѲ¨¹ø¿¡ kill ÇÑ´Ù. MaxSpareThreads, MinSpareThreads Áö½ÃÀÚ »ç¿ëÇÏ¿© ÀûÀýÈ÷ Á¶ÀýÇØ¾ß ÇÑ´Ù
F. apache 2.0.35 test °á°ú·Î´Â child process ¸¦ ´ÃÀÌ°í child process ³»¿¡ thread ¼ýÀÚ¸¦ ÁÙÀÌ´Â °ÍÀÌ ´õ ¼º´ÉÀÌ ÁÁ¾Ò´Âµ¥ ÀÌÀ¯´Â thread °£ÀÇ °æÇÕ¹®Á¦°¡ »ý±â´Â °ÍÀ¸·Î ÆǴܵȴÙ.
2. modules
compile ½Ã Æ÷ÇԵǴ ºÒ ÇÊ¿äÇÑ moduleÀ» ¾ø¾Ö¼ fork ¹× ºÒÇÊ¿äÇÑ system call ÀÇ ºÎÇϸ¦ ÁÙÀδÙ.
A. Core Features and Multi-Processing Modules
i. core
basic server operationÀ» À§Çؼ ²À ÇÊ¿äÇÏ´Ù.
ii. mpm_common
multi-processing module (MPM) À» À§ÇÑ common module
iii. MPM module ·Î¼ °¢ OS¿¡ µû¶ó¼ 1°³¸¸ Æ÷ÇÔ µÇ°Ô µÈ´Ù.
1. mpm_netware
Novell NetWare ¸¦ À§ÇÑ multi-processing module
2. mpm_winnt
Windows NT ¸¦ À§ÇÑ multi-processing module
3. perchild
°¢°¢ÀÇ process µéÀÌ ´Ù¾çÇÑ ´Ù¸¥ userid ¸¦ °¡Áö°í serving À» ÇÒ ¼ö ÀÖ´Â multi-processing module ÀÌ¸ç ½ÇÇè ´Ü°è ÀÌ´Ù.
4. prefork
apache 1.3 ÀÇ pre-forking web server ÀÇ °è½ÂµÈ multi-processing module
5. worker
hybrid multi-threaded multi-process web server ¸¦ ±¸ÇöÇÑ multi-processing module
B. Other Modules
i. mod_access
,
,
sections ¹× .htaccess files ¿¡ clinet ÀÇ hostname, ip µéÀ» °¡Áö°í access controlÀ» À§Çؼ ÇÊ¿äÇÏ´Ù.
ii. mod_actions
CGI scripts ½ÇÇàÀÌ ÇÊ¿äÇÏ´Ù¸é ÇÊ¿äÇÏ´Ù.
iii. mod_alias
URL redirection À̳ª Alias ScriptAlias À» À§ÇØ ÇÊ¿äÇÏ´Ù.
iv. mod_asis
HTTP header ¿Í ÇÔ²² file ³»¿ëÀ» ±×´ë·Î º¸³¾ ¶§ ¾²ÀδÙ. ºÒ ÇÊ¿ä ÇÏ´Ù.
v. Authentication ¿¡ ´ëÇÑ modules
Authentication ¿¡ ´ëÇÑ ±â´ÉÀÌ ÇÊ¿ä ¾øÀ¸¸é ¸ðµÎ ºÒ ÇÊ¿äÇÏ´Ù.
1. mod_auth, mod_auth_dbm
HTTP basic authentication À¸·Î¼ ÀÎÁõ¿¡ °üÇÑ Á¤º¸¸¦ text file µî¿¡ ÀúÀå ÇÒ¼ö ÀÖ°í mod_auth_dbm À» ÅëÇؼ DBM µî¿¡ ÀúÀåµÉ¼öµµ ÀÖ´Ù. ÀÎÁõ¿¡ °ü·Ã ¾øÀ¸¸é ºÒ ÇÊ¿ä.
2. mod_auth_anon
FTP ½ºÅ¸ÀÏ Ã³·³ "anonymous" user access ¸¦ authenticated areas ¿¡ Á¢±ÙÇÏ°Ô ÇÒ¼ö ÀÖ´Ù.
3. mod_auth_digest
MD5 Digest Authentication Áö¿ø. ÀÎÁõ¿¡ °ü·Ã ¾øÀ¸¸é ºÒÇÊ¿ä ÇÏ´Ù.
vi. mod_autoindex
ls¹× dir ¸í·Éó·³ directory³»ÀÇ fileµéÀ» Á¤·ÄÇؼ ³ª¿À°Ô ÇØÁÙ ¶§ ¾²ÀδÙ. ºÒÇÊ¿äÇÏ´Ù.
vii. mod_cgi
CGI scripts ½ÇÇàÀ» À§Çؼ ÇÊ¿äÇÏ´Ù.
viii. mod_deflate
content ¾ÐÃà Áö¿ø (Á¤Ã¥»ó content ¾ÐÃàÀ» Çϱ⠶§¹®¿¡ ÇÊ¿ä ÇÒ ¼ö ÀÖ´Ù.)
ix. mod_dir
directory index files À» Áö¿ø ºÒÇÊ¿ä.
x. mod_env
CGI scripts ¿Í SSI pages ¿¡ system ȯ°æ º¯¼ö Á¦°ø ºÒ ÇÊ¿ä.
xi. mod_imap
server ó¸® image mapÀ¸·Î ó¸®Çϱâ À§ÇØ ¾²ÀÌ¸ç ºÒ ÇÊ¿ä.
xii. mod_include
Server Side Includes (SSI) 󸮸¦ À§Çؼ ¾²ÀÌ¸ç ºÒ ÇÊ¿ä.
xiii. mod_log_config
Logging À§Çؼ ÇÊ¿äÇÏ´Ù.
xiv. mod_mime
content (mime-type, language, character set, encoding) ¹× fileÀÇ Æ¯¼º¿¡ µû¶ó ƯÁ¤ type À¸·Î ó¸®Çϱâ À§Çؼ ²À ÇÊ¿äÇÏ´Ù.
xv. mod_negotiation
content negotiation ¿¡ ÇÊ¿äÇÏ´Ù.
xvi. mod_proxy
HTTP/1.1 proxy ±â´É¿¡ ÇÊ¿ä.
xvii. mod_setenvif
requestÀÇ browser Ư¼º¿¡ µû¸¥ ¼·Î ´Ù¸¥ script ¸¦ Á¢±ÙÇÏ°Ô Çϰųª ȯ°æ º¯¼ö¸¦ ÁöÁ¤ÇÏ°Ô ÇÒ¼öÀÖ´Ù. BrowserMatch µîÀÇ ÁöÁö»ç¸¦ »ç¿ëÇϱâ À§Çؼ ÇÊ¿äÇÏ´Ù.
xviii. mod_so
shared object ÇüÅÂÀÇ µ¿ÀûÀÎ apache modules ÀÌ ÀÖ´Ù¸é ÇÊ¿äÇÏ´Ù.
xix. mod_ssl
Secure Sockets Layer (SSL) ¿Í Transport Layer Security (TLS) protocols À» »ç¿ëÇÑ´Ù¸é ÇÊ¿äÇÏ´Ù.
xx. mod_status
server activity ¹× performance Á¤º¸µéÀ» moniter Çϱâ À§Çؼ ÇÊ¿ä.
xxi. mod_userdir
»ç¿ëÀÚ °èÁ¤À» ÀÌ¿ëÇÏ¿© home page ¸¦ Á¦°ø ÇÑ´Ù. ºÒ ÇÊ¿ä ÇÏ´Ù.
3. MaxClient ¼ö¸¦ À§ÇÑ source ¼öÁ¤
A. apahce 1.3
apache_1.3.x/src/include/httpd.h ÀÇ ¿¡¼
HARD_SERVER_LIMIT 256
B. apache 2.0
i. prefork
httpd-2.0.36/server/mpm/prefork/prefork.c
DEFAULT_SERVER_LIMIT 256
ii. worker
httpd-2.0.36/server/mpm/worker/worker.c
DEFAULT_SERVER_LIMIT 16
DEFAULT_THREAD_LIMIT 64
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±Û¾´ÀÌ : ±èÁø´ö
³¯Â¥ : 2003/10/28
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KeepAlive ¿¡ ´ëÇؼ On À» ÇØ¾ß ¼º´ÉÀÌ ´õ ÁÁÀºÁö Off ¸¦ ÇØ¾ß ¼º´ÉÀÌ ´õ ÁÁÀºÁö ³í¶õÀÌ ¸¹½À´Ï´Ù.
±×·¯³ª ȯ°æ¿¡ µû¶ó¼ ¸¹ÀÌ Æ²¸³´Ï´Ù. ÇÑÁ¤µÈ »ç¶÷ÀÌ ÁÖ±âÀûÀ¸·Î °è¼Ó Á¢¼ÓÇÒ¶§... ¿¹¸¦ µé¾î ±×·ì¿þ¾î°°ÀÌ ÇÑÁ¤µÈ IP ¿¡¼ Á¢¼ÓÇÒ¶© KeepAlive ¸¦ On À» ÇØ¾ß ¼º´ÉÀÌ ÁÁ½À´Ï´Ù. ¿Ö³Ä¸é TCP/IP ÀÇ 3 ¿þÀÌ ÇÚµå ¼¼ÀÌÅ· ºÎÇϸ¦ KeepAlive ½Ã°£ µ¿¾È Á¶±Ý ÁÙ¿©ÁÝ´Ï´Ù.
±×·¯³ª ¸Å¹ø Á¢¼ÓÇÒ¶§¸¶´Ù ·£´ýÇÏ°Ô ¾î¶°ÇÑ IP¿¡¼ Á¢¼ÓÇÒÁö ¸ð¸£°í ¶ÇÇÑ Á¢¼ÓÈÄ¿¡ ÇϳªÀÇ ¸®Äù½ºÆ®¸¸ ó¸®ÇÏ°í ¶Ç ¿Ã ÇÊ¿ä°¡ ¾ø´Â ¼¹ö¿¡¼± KeepAlive Off °¡ ¼º´ÉÀÌ ´õ ÁÁ½À´Ï´Ù.
ÃÊ´ç ÄÁ³Ø¼ÇÀÌ ¸¹Áö ¾Ê´Ù¸é °ÅÀÇ Â÷ÀÌ ¾ø½À´Ï´Ù.
¾ÆÆÄÄ¡ÀÇ °¡Àå Ãë¾àÁ¡ °ø°ÝÀº Slow Get °ø°ÝÀÔ´Ï´Ù. ºÐ»ê DOS °ø°Ýº¸´Ù ´õ¿í´õ °·ÂÇÑ ÀÌ °ø°ÝÀ» ÇÇÇϽǷÁ¸é Timeout °ªÀ» ¸Å¿ì ¸¹ÀÌ ÁÙ¿©¾ß ÇÕ´Ï´Ù.
Slow GET °ø°ÝÀÇ ¿ø¸®´Â ¾ÆÆÄÄ¡¿¡ ¿äûÀ» °É°í Timeout µ¿¾È ¾Æ¹«ÀÏ ÇÏÁö ¾Ê°í ÀÖ´Ù°¡ Timeout¿¡ ÀÇÇØ ÄÁ³Ø¼ÇÀÌ ²÷¾îÁú·Á°í ÇÒ¶§ Á¶±Ý¾¿ ¿äûÀ» º¸³À´Ï´Ù.
ÀÌ·¸°Ô µÇ¸é ÇϳªÀÇ ¿äûÀ» ó¸®ÇÏ´À³Ä ¾ÆÆÄÄ¡ ÇÁ·Î¼¼½º´Â ÀÌ ¿äûÀ» Àâ°í ÀÖ´Â ½Ã°£ÀÌ ´Ã¾î³ª°í °è¼Ó ÀÌ·±½ÄÀÇ ¿äûÀ» º¸³»¸é ¾ÆÆÄÄ¡ÀÇ ¸ðµç ÇÁ·Î¼¼½º´Â °è¼Ó Æ÷Å·ÇÏ¿© MaxClient ±îÁö Â÷°Ô µË´Ï´Ù. Á¤»óÀûÀÎ Á¢¼ÓÀÌ µé¾î¿À¸é MaxClient °ªÀÌ ³Ñ¾î°¡¼ 󸮸¦ ¸øÇÏ°Ô µË´Ï´Ù...
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Re: OpenSSL Ãë¾àÁ¡ Á¤¸®, Logjam(·Î±×Àë)¿¡¼ Heartbleed±îÁö
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LET¡¯S START WITH ON
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QCad for Windows --- GNU GPL (Free Software)
The Hello World Collection
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