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¾È³çÇϼ¼¿ä. Çϳª ¿©ÂÞ¾î º¼·Á°í ÇÕ´Ï´Ù.. ¼Ö¶ó¸®½º¿¡¼­ tcp_wra

 
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¿Ã¸®±â¿Ã·ÁÁü: 2004.3.31 ¼ö, 4:45 pm    ÁÖÁ¦: ¾È³çÇϼ¼¿ä. Çϳª ¿©ÂÞ¾î º¼·Á°í ÇÕ´Ï´Ù.. ¼Ö¶ó¸®½º¿¡¼­ tcp_wra Àοë°ú ÇÔ²² ´äº¯

Áö±Ý²¯ ·¹µåÇÞÀ»»ç¿ëÇÏ¸é ±âº»ÀûÀ¸·Î
tcp_wrapper Áö¿øÇؼ­ ½Å°æ¾²Áö¾Ê°í »ç¿ëÇߴµ¥..¿ä
¹°·Ð /etc/hosts.allow¶óµçÁö
/etc/hosts.deny µµ
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¼Ö¶ó¸®½º¿¡ tcp_waprper¸¦ Àß ±ò°í ³ª¼­.. º¸¸é
/usr/local/bin/tcpd ,tcpdchk tcpdmatch °°Àº ÇÁ·Î±×·¥ÀÌ Àß±ò·ÁÀÖ½À´Ï´Ù.

±×¸®°í ³ª¼­ ¸®´ª½º¿Í´Â Ʋ¸®°Ô ¼Ö¶ó¸®½º´Â
/etc/inetd.conf ¾È¿¡ tcp_waprper »ç¿ëÇÒ°ÍÀ» ÁöÁ¤ÇØÁà¾ßÇÑ´Ù°íÇØ¼­

ftp stream tcp6 nowait root /usr/local/bin/tcpd in.ftpd -a
ÀÌ·±¾¿À¸ /usr/local/bin/tcpd¸¦
ÅëÇØ °¨½ÃÇÏ°Ú´Ù°í ¹Ù²Ù¾îÁá½À´Ï´Ù..

±×¸®°í Á¦°¡ ¿©Â޾°í½ÍÀº°ÍÀº
/etc/hosts.allow ¶û /etc/hosts.deny ¸¦ ¸¸µé¾îÁÖ°í

/etc/hosts.deny³»¿ëÀº

ALL:ALL
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/etc/hosts.allow ³»¿ëÀº
in.ftpd:10.70.
ÀÌ·±¾¿À¸·Î ³×Æ®¿öÅ©³» Àüü¸¦ Çã¿ëÇØÁá½À´Ï´Ù..

±×¸®°í ³ª¼­
tcpdchk ¸í·É¾î·Î üũÇÏ¸é ±¸¹®¿¡·¯¾øÀÌ ³Ñ¾î°¡°í¿ä..

tcpdmatch ¸í·É¾î·Î üũÇÏ¸é ¾Æ·¡°°Àº ¾ÆÀÌÇÇ´Â Çã¿ëÇÏ°Ú´Ù°í ³ª¿É´Ï´Ù.
tcpdmatc# tcpdmatch in.ftpd 10.70.41.80
client: address 10.70.41.80
server: process in.ftpd
matched: /etc/hosts.allow line 1
access: granted

±×·±µ¥ ½ÇÁ¦ 10.70.41.80 ¾ÆÀÌÇÇ¿¡¼­ ftp¼­¹ö·Î Á¢¼ÓÇϸé Á¢¼ÓÄ¡ ¸øÇÕ´Ï´Ù..

¹°·Ð /etc/hosts.deny ºÎºÐÀÇ ALL:ALL ¸¦ »èÁ¦Çϸé
Á¦´ë·Î Á¢±ÙÇÕ´Ï´Ù..

¾Æ¹«·¡µµ /etc/hosts.allow Çã¿ëºÎºÐÀÌ ±¸¹®ÀÌ À߸øµÇ¾ú´Â°Í°°Àºµ¥..

¸ð¸£°Ú³×¿ä..

±×·¡¼­ Çѹø´õ /etc/hosts.allow¸¦ ¾Æ·¡¿Í°°ÀÌ ¼³Á¤Çϰí
# cat /etc/hosts.allow
in.ftpd: 10.70.41.80

Á¢¼Ó°¡´ÉÇÑ ¾ÆÀÌÇÇ Çϳª¸¸ ÀúÀåÇÏ°í³ª¼­

¾Æ·¡¿Í °°ÀÌ Ã¼Å©¸¦ Çϸé
# tcpdchk
warning: /etc/hosts.allow, line 2: host address 10.70.41.80->name lookup failed
ÀÌ·±¾¿À¸·Î ¿¡·¯°¡ ³ª³×¿ä..

¸®´ª½º¿¡¼­´Â ÀÌ·±¿¡·¯°¡ ³ªÁöµµ ¾Ê°í ³×Æ®¿öÅ©´ë¸¦ Çã¿ëÇÏ¸é ±× ³×Æ®¿öÅ©´ë¿¡¼­ Á¢¼Óµµ ´Ù
ÀߵǴµ¥.. ¿ÖÀÌ·±Áö Ȥ½Ã ¾Æ½Ã´ÂÁö¿ä...?
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¿Ã¸®±â¿Ã·ÁÁü: 2004.5.08 Åä, 10:50 am    ÁÖÁ¦: Re: ¼Ö¶ó¸®½º¿¡¼­ tcp wrapper Àοë°ú ÇÔ²² ´äº¯

/etc/inetd.conf

ftp stream tcp6 nowait root /usr/local/bin/tcpd in.ftpd -a

-->

ftp stream tcp nowait root /usr/local/bin/tcpd in.ftpd -a

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