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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
 <META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9">
 <TITLE>VPN HOWTO: ¥µ¡¼¥Ð</TITLE>
 <LINK HREF="VPN-HOWTO-4.html" REL=next>
 <LINK HREF="VPN-HOWTO-2.html" REL=previous>
 <LINK HREF="VPN-HOWTO.html#toc3" REL=contents>
</HEAD>
<BODY>
<A HREF="VPN-HOWTO-4.html">¼¡¤Î¥Ú¡¼¥¸</A>
<A HREF="VPN-HOWTO-2.html">Á°¤Î¥Ú¡¼¥¸</A>
<A HREF="VPN-HOWTO.html#toc3">Ìܼ¡¤Ø</A>
<HR>
<H2><A NAME="s3">3. ¥µ¡¼¥Ð</A></H2>

<P>¥µ¡¼¥Ð̵¤·¤Ç¤Ï¥¯¥é¥¤¥¢¥ó¥È¤Ï²¿¤ÎÌò¤Ë¤âΩ¤¿¤Ê¤¤¤Î¤Ç¡¢¤³¤Î¥»¥¯¥·¥ç¥ó¤Ç¤Ï
ºÇ½é¤Ë¤ä¤ë¤Ù¤­¤¤¤¯¤Ä¤«¤Î¤³¤È¤ò¡¢¥µ¡¼¥Ð¦¤Ç¤¤¤«¤ËÀßÄꤹ¤ë¤«½Ò¤Ù¤ë¤³¤È¤Ë¤·¤Þ¤¹¡£
<H2><A NAME="ss3.1">3.1 ¥»¥­¥å¥ê¥Æ¥£ ¡Ý ¿Í¡¹¤òÄù¤á½Ð¤¹</A>
</H2>

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¤¤¤ë¤ó¤Ç¤¹¤è¤Í¡© ¥µ¡¼¥Ð¤òÀßÄꤹ¤ë¤Ë¤¢¤¿¤Ã¤Æ¤Ï¡¢¤¤¤¯¤Ä¤«¤Î¤³¤È¤ò¿´¤Ëα¤á¤Æ¤ª¤¯É¬Íפ¬¤¢¤ê¤Þ¤¹¡£
<H3>¥Ç¡¼¥â¥ó¤ò¸º¤é¤»</H3>

<P>¤³¤Î¥µ¡¼¥Ð¤Ï¥Õ¥¡¥¤¥¢¥¦¥©¡¼¥ë¤ÎËÃÖ¤«¤ì¡¢¥È¥é¥Õ¥£¥Ã¥¯¤ò
¥Í¥Ã¥È¥ï¡¼¥¯¤ÎÃæ¤ØžÁ÷¤¹¤ë¤è¤¦¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë¤Î¤Ç¡¢²Äǽ¤Ê¸Â¤ê
¤½¤ÎÈ¢¤ò°ÂÁ´¤Ë¤¹¤ë¤È¤¤¤¦¤Î¤ÏÎɤ¤¹Í¤¨¤Ç¤¹¡£Linux ¤Î¥»¥­¥å¥ê¥Æ¥£¤Ë¤Ä¤¤¤Æ¤Ï
<A HREF="http://www.linuxdoc.org/HOWTO/Security-HOWTO.html">Linux Security HOWTO</A>
¤Ç¤µ¤é¤ËÄ´¤Ù¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£ [ ÌõÃí¡§ÆüËܸìÌõ¤Ï 
<A HREF="http://www.linux.or.jp/JF/JFdocs/Security-HOWTO.html">http://www.linux.or.jp/JF/JFdocs/Security-HOWTO.html</A> ¤Ë¤¢¤ê¤Þ¤¹¡£]
ÌÜŪ¤Î¤¿¤á¤Ë¡¢»ä¤Ï sshd ¤È Roxen Web server
°Ê³°¤ÎÁ´¤Æ¤ò kill ¤·¤Þ¤·¤¿¡£VPN ¤Ë¥¢¥¯¥»¥¹¤¹¤ë¿·¤·¤¤¥Þ¥·¥ó¤òÀßÄꤹ¤ë¤¿¤á¡¢ 
2¤Ä¤Î¥Õ¥¡¥¤¥ë¡Ê¥¹¥¯¥ê¥×¥È¡¢¤½¤Î¾¡Ë¤ò¥À¥¦¥ó¥í¡¼¥É¤¹¤ëÌÜŪ¤Ç¥¦¥§¥Ö¥µ¡¼¥Ð¤òÍøÍѤ·¤Æ¤¤¤Þ¤¹¡£
FTP ¥µ¡¼¥Ð¤Ï»È¤¤¤Þ¤»¤ó¡£¤½¤ì¤Ï¡¢¥¦¥§¥Ö¥µ¡¼¥Ð·Ðͳ¤Ç¿¾¯¤Î¥Õ¥¡¥¤¥ë¤ò¸«¤¨¤ë
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Æñ¤·¤¤¤«¤é¤Ç¤¹¡£¤½¤ì¤Ë¡¢Ã±¤Ë¥Õ¥¡¥¤¥ë¤ò¥À¥¦¥ó¥í¡¼¥É
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Áö¤é¤»¤¿¤¤¤È»×¤Ã¤Æ¤¤¤ë¤Î¤Ç¤¢¤ì¤Ð¡¢¥×¥é¥¤¥Ù¡¼¥È¥Í¥Ã¥È¥ï¡¼¥¯¤Ë¤¢¤ë¥Þ¥·¥ó°Ê³°¡¢
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<H3>¥Ñ¥¹¥ï¡¼¥É¤òµö¤¹¤Ê</H3>

<P>¤½¤¦¡¢¤½¤ì¤ÏÇϼ¯¤²¤¿¤³¤È¤Ëʹ¤³¤¨¤Þ¤¹¡£¤±¤ì¤É¤âµ¤¤Ë¤Ê¤ë¤Ç¤·¤ç¤¦¡©
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¤³¤ÎÊýË¡¤Ç¤Ï¥­¡¼¤ò»ý¤Ã¤¿¼Ô¤À¤±¤¬Æþ¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹¤¬¡¢530 ʸ»ú¤â¤ÎŤµ¤Î¥Ð¥¤¥Ê¥ê
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¤¹¤ë¤³¤È¤¬É¬ÍפǤ¹¡£2 ÈÖÌܤΥե£¡¼¥ë¥É¤Ï¥Ñ¥¹¥ï¡¼¥É¥Ï¥Ã¥·¥å¡¢¤¢¤ë¤¤¤Ï
ǧ¾Ú¥·¥¹¥Æ¥à¤Ë /etc/shadow ¥Õ¥¡¥¤¥ë¤ò¸«¤ë¤è¤¦»Ø¼¨¤¹¤ë 'x' ¤Î¤¤¤º¤ì¤«¤¬
´Þ¤Þ¤ì¤Æ¤¤¤Þ¤¹¡£¤·¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¤³¤È¤Ï¡¢¤½¤Î¥Õ¥£¡¼¥ë¥É¤ò
'*'¤Ë½ñ¤­¤«¤¨¤ë¤³¤È¤Ç¤¹¡£¤³¤ì¤Ïǧ¾Ú¥·¥¹¥Æ¥à¤ËÂФ·¤Æ¡¢¥Ñ¥¹¥ï¡¼¥É¤Ï̵¤·¤Ç¡¢
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<P>
<A NAME="passwd"></A> 
ŵ·¿Åª¤Ê /etc/passwd ¥Õ¥¡¥¤¥ë¤Î·Á¼°¤ò¼¡¤Ë¼¨¤·¤Þ¤¹¡£
<PRE>
....
nobody:x:65534:100:nobody:/dev/null:
mwilson:x:1000:100:Matthew Wilson,,,:/home/mwilson:/bin/bash
joe:*:504:101:Joe Mode (home),,,:/home/vpn-users:/usr/sbin/pppd
bill:*:504:101:Bill Smith (home),,,:/home/vpn-users:/usr/sbin/pppd
frank:*:504:101:Frank Jones (home),,,:/home/vpn-users:/usr/sbin/pppd
....
</PRE>

»ä¤¬ 2ÈÖÌܤΥե£¡¼¥ë¥É¤òÊÔ½¸¤¹¤ë¤À¤±¤Ç¤Ê¤¯¡¢¤â¤Ã¤È¼ê¤ò²Ã¤¨¤¿¤È¤¤¤¦¤³¤È¤ò
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<H2><A NAME="ss3.2">3.2 ¥æ¡¼¥¶¥¢¥¯¥»¥¹ - ¤ß¤ó¤Ê¤òÃæ¤Ø</A>
</H2>

<P>¥æ¡¼¥¶¥¢¥¯¥»¥¹¤Ï ssh ¤Îǧ¾Ú¥¹¥­¡¼¥à¤òÄ̤·¤Æ°Ù¤µ¤ì¤Þ¤¹¡£¾å¤Ç½Ò¤Ù¤¿¤è¤¦¤Ë¡¢
¤³¤ì¤¬¹â¥ì¥Ù¥ë¤Î¥»¥­¥å¥ê¥Æ¥£¤ò°Ý»ý¤·¤Ä¤Ä¡¢¥æ¡¼¥¶¤¬¥·¥¹¥Æ¥à¤Ë¥¢¥¯¥»¥¹¤¹¤ë
ÊýË¡¤Ç¤¹¡£¤â¤· ssh ¤ËÆëÀ÷¤ß¤¬¤Ê¤±¤ì¤Ð¡¢
<A HREF="http://www.ssh.org/">http://www.ssh.org/</A>¤ò¥Á¥§¥Ã¥¯¤·¤Æ¤ß¤Æ¤¯¤À¤µ¤¤¡£
»ä¤¬ ssh ¤Î¥Ð¡¼¥¸¥ç¥ó 2 ¤Ç¤Ê¤¯¥Ð¡¼¥¸¥ç¥ó 1 ¤ò»È¤Ã¤Æ¤¤¤ë¤È¤¤¤¦¤³¤È¤ËÃí°Õ¤·¤Æ
¤¯¤À¤µ¤¤¡£Æäˡ¢¥Ð¡¼¥¸¥ç¥ó 1 ¤Ï¥Õ¥ê¡¼¤Ç¡¢2 ¤Ï¤½¤¦¤Ç¤Ê¤¤¤È¤¤¤¦Â礭¤Ê°ã¤¤¤¬
¤¢¤ê¤Þ¤¹¡£
<H3><CODE>sshd</CODE> ¤òÀßÄꤹ¤ë</H3>

<P>¤¢¤Ê¤¿¤Ï sshd ¤òÀßÄꤹ¤ëɬÍפ¬¤¢¤ë¤Ç¤·¤ç¤¦¡£¥ª¥×¥·¥ç¥ó¤Ë¤Ï¼¡¤Î¤è¤¦¤Ê
¤â¤Î¤¬¤¢¤ê¤Þ¤¹¡£°Õ¿Þ¤·¤Æ¤¤¤ë¤Î¤Ï¥Ñ¥¹¥ï¡¼¥Éǧ¾Ú¤ª¤è¤Ó rhosts ǧ¾Ú¤òÉԲĤË
¤¹¤ë¤È¤¤¤¦¤³¤È¤Ç¤¹¡£/etc/sshd_config ¥Õ¥¡¥¤¥ë¤Ë¤Ï¡¢¼¡¤Ëµó¤²¤ë¤è¤¦¤Ê
¥ª¥×¥·¥ç¥ó¤¬¤¢¤ê¤Þ¤¹¡£
<P>
<PRE>
PermitRootLogin yes
IgnoreRhosts yes
StrictModes yes
QuietMode no
CheckMail no
IdleTimeout 3d
X11Forwarding no
PrintMotd no
KeepAlive yes
RhostsAuthentication no
RhostsRSAAuthentication no
RSAAuthentication yes
PasswordAuthentication no
PermitEmptyPasswords no
UseLogin no
</PRE>
<H2><A NAME="ss3.3">3.3 ¥æ¡¼¥¶¤òÀ©¸Â¤¹¤ë</A>
</H2>

<P>¤³¤ì¤Ç°­¤¤¿Í¤¿¤Á¤ÏÄù¤á½Ð¤µ¤ì¡¢Îɤ¤¿Í¤À¤±¤¬¥¢¥¯¥»¥¹¤òµö¤µ¤ì¤ë
¤è¤¦¤Ë¤Ê¤Ã¤¿¤Î¤Ç¡¢º£ÅÙ¤ÏÎɤ¤¿Í¤¿¤Á¤¬°­¤µ¤ò¤·¤Ê¤¤¤è¤¦¤Ë
¼ê¤òÂǤäƤª¤¯¤Ù¤­¤«¤â¤·¤ì¤Þ¤»¤ó¡£
¤³¤ì¤ÏÈà¤é¤Ë pppd °Ê³°¤Î¤â¤Î¤òµ¯Æ°¤µ¤»¤Ê¤¤¤È¤¤¤¦¤³¤È¤Ç¡¢¶Ë¤á¤Æ´Êñ¤Ë¼Â¹Ô¤Ç¤­¤Þ¤¹¡£
¤³¤ì¤ÏɬÍפ«¤â¤·¤ì¤Þ¤»¤ó¤·¡¢É¬ÍפǤʤ¤¤«¤â¤·¤ì¤Þ¤»¤ó¡£»ä¤Ï¥æ¡¼¥¶¤òÀ©¸Â
¤·¤Æ¤¤¤Þ¤¹¡£¤½¤ì¤Ï¡¢Êݼ餷¤Æ¤¤¤ë¥·¥¹¥Æ¥à¤¬ VPN ÀìÍѤǤ¢¤ê¡¢¥æ¡¼¥¶¤Ï
¤½¤Î¾å¤Ç¤½¤Î¾¤Î¤³¤È¤ò¤¹¤ëɬÍפ¬¤Ê¤¤¤¿¤á¤Ç¤¹¡£
<H3>sudo ¤«Èݤ«</H3>

<P>Unix ¥·¥¹¥Æ¥à¤Î´ÉÍý¼Ô¤¬¡¢¤¢¤ë¥æ¡¼¥¶¤¬ÆÃÄê¤Î¥×¥í¥°¥é¥à¤ò root ¸¢¸Â¤Ç
¼Â¹Ô¤Ç¤­¤ë¤è¤¦µö²Ä¤òÍ¿¤¨¤ë¡¢ sudo ¤È¸Æ¤Ð¤ì¤ë¾®¤µ¤¯¤ÆÁÇŨ¤Ê¥×¥í¥°¥é¥à
¤¬¤¢¤ê¤Þ¤¹¡£pppd ¤Ï root ¤È¤·¤Æ¼Â¹Ô¤¹¤ëɬÍפ¬¤¢¤ë¤Î¤Ç¡¢¤³¤Î¾ì¹ç¤Ë¤ÏɬÍפǤ¹¡£
¥æ¡¼¥¶¤Ë¥·¥§¥ë¥¢¥¯¥»¥¹¤ò
µö²Ä¤·¤è¤¦¤È¤¹¤ë¾ì¹ç¤Ë¤Ï¡¢¤³¤ÎÊýË¡¤ò»È¤¦É¬Íפ¬¤¢¤ë¤Ç¤·¤ç¤¦¡£sudo ¤ò
¤É¤Î¤è¤¦¤ËÀßÄꤷ¡¢sudo ¤ò¤É¤Î¤è¤¦¤Ë»È¤¦¤«¤Ï sudo ¤Î¥Þ¥Ë¥å¥¢¥ë¥Ú¡¼¥¸¤Ç
Ä´¤Ù¤Æ¤¯¤À¤µ¤¤¡£³µ¤·¤Æ¡¢¾¯¿ô¤Î¿®Íê¤Ç¤­¤ë¥æ¡¼¥¶¤Ë»È¤ï¤ì¤ë¤è¤¦¤Ê
Ê£¿ôÍøÍÑ¥·¥¹¥Æ¥à¤Ë¤ª¤¤¤Æ¡¢sudo ¤ò»È¤¦¤³¤È¤ÏºÇÁ±¤ÎÊýË¡¤Ç¤¹¡£
<P>
<P>¥æ¡¼¥¶¤Ë¥·¥§¥ë¥¢¥¯¥»¥¹¤òµö²Ä¤·¤Ê¤¤¤³¤È¤ò·è¤á¤¿¤Ê¤é¤Ð¡¢¤½¤³¤Ë¿¯Æþ¤µ¤»¤º¤Ë¤ª¤¯
¤â¤Ã¤È¤âÎɤ¤ÊýË¡¤Ï¡¢Èà¤é¤Î¥·¥§¥ë¤ò pppd ¤Ë¤¹¤ë¤³¤È¤Ç¤¹¡£¤³¤ì¤Ï /etc/passwd
¥Õ¥¡¥¤¥ë¤Ë¤è¤Ã¤Æ¼Â¸½¤Ç¤­¤Þ¤¹¡£»ä¤¬ºÇ¸å¤Î 3 ¿Í¤Î¥æ¡¼¥¶¤Ë¤·¤¿¤³¤È¤Ï
<A HREF="#passwd">¾å¤Ë¤¢¤ëµ­½Ò</A> ¤Ç¸«¤ë¤³¤È¤¬½ÐÍè¤Þ¤¹¡£/etc/passwd ¤Î
ºÇ¸å¤Î¥Õ¥£¡¼¥ë¥É¤Ï¥æ¡¼¥¶¤Î¥·¥§¥ë¤Ç¤¹¡£pppd ¤òÆ°¤«¤¹¤¿¤á¤Ë
ÆÃÊ̤ʤ³¤È¤ò¤¹¤ëɬÍפϤ¢¤ê¤Þ¤»¤ó¡£¤½¤ì¤Ï¥æ¡¼¥¶¤¬Àܳ¤¹¤ë¤È root ¤È¤·¤Æ
¼Â¹Ô¤µ¤ì¤Þ¤¹¡£¤³¤ì¤ÏºÇ¤â°ÂÁ´¤Ç¤¢¤ë¤ÈƱ»þ¤Ë¡¢°Ù¤·ÆÀ¤ë¤¦¤Á¤Î´Ö°ã¤¤¤Ê¤¯
ºÇ¤âñ½ã¤ÊÀßÄêÊýË¡¤Ç¤¹¡£¤½¤ì¤ÏÂ絬ÌϤǤޤȤޤä¿¥·¥¹¥Æ¥à¤ËÂФ·¤Æ¤Ï
ÍýÁÛŪ¤Ç¤¹¡£¤ä¤ë¤Ù¤­¤³¤È¤Ï¤³¤Î¥É¥­¥å¥á¥ó¥È¤Î¸å¤ÎÊý¤Ç¤­¤Á¤ó¤ÈÀâÌÀ¤·¤Þ¤¹¡£
¤ªË¾¤ß¤Ç¤¢¤ì¤Ð 
<A HREF="VPN-HOWTO-5.html#user-accounts">¤½¤Á¤é¤òÀè¤ËÆɤà</A> ¤³¤È¤â¤Ç¤­¤Þ¤¹¡£ 
<H2><A NAME="ss3.4">3.4 ¥Í¥Ã¥È¥ï¡¼¥­¥ó¥°</A>
</H2>

<P>¤³¤ì¤Ç¥æ¡¼¥¶¤Ï¥·¥¹¥Æ¥à¤Ë¥¢¥¯¥»¥¹½ÐÍè¤ë¤è¤¦¤Ë¤Ê¤Ã¤¿¤ï¤±¤Ç¤¹¤¬¡¢
Èà¤é¤¬¥Í¥Ã¥È¥ï¡¼¥¯¤Ë¥¢¥¯¥»¥¹¤Ç¤­¤ë¤³¤È¤Ï³Îǧ¤¹¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£
»ä¤¿¤Á¤Ï Linux ¥«¡¼¥Í¥ë¤Î¥Õ¥¡¥¤¥¢¥¦¥©¡¼¥ë¤Î¥ë¡¼¥ë¤È¥ë¡¼¥Æ¥£¥ó¥°¥Æ¡¼¥Ö¥ë
¤Ë¤è¤Ã¤Æ¤½¤ì¤ò¹Ô¤¤¤Þ¤¹¡£<CODE>route</CODE> ¤ª¤è¤Ó <CODE>ipfwadm</CODE> ¥³¥Þ¥ó¥É¤ò
»È¤¦¤È¡¢¥Í¥Ã¥È¥ï¡¼¥¯¥È¥é¥Õ¥£¥Ã¥¯¤òŬÀÚ¤ÊÊýË¡¤Ç°·¤¦¤è¤¦¥«¡¼¥Í¥ë¤òÀßÄê
¤¹¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£¤³¤ì°Ê¾å¤Î <CODE>ipfwadm</CODE>, <CODE>ipchains</CODE>
¤½¤ì¤«¤é <CODE>route</CODE> ¤Ë¤Ä¤¤¤Æ¤Î¾ðÊó¤Î¤¿¤á¤Ë¤Ï
<A HREF="http://www.linuxdoc.org/HOWTO/Linux-Networking-HOWTO.html">Linux Networking HOWTO</A> ¤ò»²¾È¤·¤Æ¤¯¤À¤µ¤¤¡£
<H3>¥«¡¼¥Í¥ë</H3>

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<A HREF="http://www.linuxdoc.org/HOWTO/Kernel-HOWTO.html">Kernel HOWTO</A>¤òÆɤà¤Ù¤­¤Ç¤¹¡£´ðËܥͥåȥ¥¯¤Ë²Ã¤¨¤Æ¡¢¼¡¤Ë¼¨¤¹
¥«¡¼¥Í¥ë¥ª¥×¥·¥ç¥ó¤¬¥ª¥ó¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤³¤È¤ò³Îǧ¤¹¤ëɬÍפ¬¤¢¤ë¤Ç¤·¤ç¤¦¡£
»ä¤Ï¼«Ê¬¤Î¥·¥¹¥Æ¥à¤Ç 2.0.38 ¥«¡¼¥Í¥ë¤ò»È¤Ã¤Æ¤¤¤Þ¤¹¡£
<P>2.0 ¥«¡¼¥Í¥ë¤Ë¤ª¤¤¤Æ - 
<UL>
<LI>CONFIG_FIREWALL</LI>
<LI>CONFIG_IP_FORWARD</LI>
<LI>CONFIG_IP_FIREWALL</LI>
<LI>CONFIG_IP_ROUTER</LI>
<LI>CONFIG_IP_MASQUERADE (optional)</LI>
<LI>CONFIG_IP_MASQUERADE_ICMP (optional)</LI>
<LI>CONFIG_PPP</LI>
</UL>
<P>2.2 ¥«¡¼¥Í¥ë¤Ë¤ª¤¤¤Æ - 
<UL>
<LI>CONFIG_FIREWALL</LI>
<LI>CONFIG_IP_ADVANCED_ROUTER</LI>
<LI>CONFIG_IP_FIREWALL</LI>
<LI>CONFIG_IP_ROUTER</LI>
<LI>CONFIG_IP_MASQUERADE (optional)</LI>
<LI>CONFIG_IP_MASQUERADE_ICMP (optional)</LI>
<LI>CONFIG_PPP</LI>
</UL>
<H3>¥Õ¥£¥ë¥¿µ¬Â§</H3>

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¥¢¥¯¥»¥¹½ÐÍè¤ë¤è¤¦¡¢¥Õ¥¡¥¤¥¢¥¦¥©¡¼¥ë¤Î¥Õ¥£¥ë¥¿µ¬Â§¤òµ­½Ò¤·¤Þ¤·¤ç¤¦¡£
¤â¤·¤³¤ì¤¬´ñ̯¤Ëʹ¤³¤¨¤ë¤Ê¤é¡¢
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<PRE>
# /sbin/ipfwadm -F -f
# /sbin/ipfwadm -F -p deny
# /sbin/ipfwadm -F -a accept -S 192.168.13.0/24 -D 172.16.0.0/12
</PRE>
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<PRE>
# /sbin/ipchains -F forward
# /sbin/ipchains -P forward DENY
# /sbin/ipchains -A forward -j ACCEPT -s 192.168.13.0/24 -d 172.16.0.0/12
</PRE>
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<P>
<PRE>
172.16.254.254 ¤¬ÆâÉô¥²¡¼¥È¥¦¥§¥¤¤Ç¤¢¤ë¤È¤¹¤ë¤È - 

# /sbin/route add -net 10.0.0.0 netmask 255.0.0.0 gw 172.16.254.254 dev eth1
# /sbin/route add -net 172.16.0.0 netmask 255.240.0.0 gw 172.16.254.254 dev eth1
# /sbin/route add -net 192.168.0.0 netmask 255.255.0.0 gw 172.16.254.254 dev eth1
</PRE>
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