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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: ¼Â¹Ô</TITLE>
 <LINK HREF="VPN-HOWTO-6.html" REL=next>
 <LINK HREF="VPN-HOWTO-4.html" REL=previous>
 <LINK HREF="VPN-HOWTO.html#toc5" REL=contents>
</HEAD>
<BODY>
<A HREF="VPN-HOWTO-6.html">¼¡¤Î¥Ú¡¼¥¸</A>
<A HREF="VPN-HOWTO-4.html">Á°¤Î¥Ú¡¼¥¸</A>
<A HREF="VPN-HOWTO.html#toc5">Ìܼ¡¤Ø</A>
<HR>
<H2><A NAME="s5">5. ¼Â¹Ô</A></H2>

<P>¤³¤Î¥»¥¯¥·¥ç¥ó¤Ç¤Ï VPN ¥·¥¹¥Æ¥à¤Î¹½ÃÛË¡¤Ë¤Ä¤¤¤Æ½çÈÖ¤ËÀâÌÀ¤·¤Þ¤¹¡£¤Þ¤º¥µ¡¼¥Ð¤«¤é
»Ï¤á¡¢¼¡¤Ë¥¯¥é¥¤¥¢¥ó¥È¤Ø¤È°Ü¤Ã¤Æ¤¤¤­¤Þ¤¹¡£Îã¤È¤¹¤ë¤¿¤á¤Ë¡¢°Û¤Ê¤ë 2 ¼ïÎà¤Î
VPN ÀßÄê¤òɬÍפȤ¹¤ë¾õ¶·¤ò¹Í¤¨¤Æ¤ß¤Þ¤¹¡£
<H2><A NAME="ss5.1">5.1 ·×²è</A>
</H2>

<P>mycompany.com ¤È¤¤¤¦²ñ¼Ò¤ò»ý¤Ã¤Æ¤¤¤ë¤ÈÁÛÁü¤·¤Æ¤ß¤Æ¤¯¤À¤µ¤¤¡£ËܼÒ
¥ª¥Õ¥£¥¹¤Ç¡¢Í½Ì󤵤줿¥Í¥Ã¥È¥ï¡¼¥¯ 192.168.0.0 ¤ò»È¤Ã¤Æ¤ª¤ê¡¢
·ÐÏ©ÀßÄê¤òµö¤¹¤è¤¦¤Ë¥¯¥é¥¹ B ¥Í¥Ã¥È¥ï¡¼¥¯¤ò 256 ¤Î¥¯¥é¥¹ C ¤Ë
¤·¤Æ¤¤¤Þ¤¹¡£¤Á¤ç¤¦¤É 2 ¤Ä¤Î¾®¤µ¤ÊÎ¥¤ì¤¿½ê¤Ë¤¢¤ë¥ª¥Õ¥£¥¹¤òÀßÄꤷ¤¿¤È¤³¤í¤Ç¡¢
¤½¤ì¤é¤ò¥Í¥Ã¥È¥ï¡¼¥¯¤ËÄɲä·¤¿¤¤¤È»×¤Ã¤Æ¤¤¤Þ¤¹¡£¤Þ¤¿
¼«Â𤫤é»Å»ö¤·¤Æ¤¤¤ë½¾¶È°÷¤Ë¡¢Èà¤é¤¬¥À¥¤¥ä¥ë¥¢¥Ã¥×¤¹¤ëÂå¤ï¤ê¤Ë
DSL ¤ä ¥±¡¼¥Ö¥ë¥â¥Ç¥à¤ÇÀܳ¤Ç¤­¤ë¤è¤¦¤Ë¤µ¤»¤¿¤¤¤È¤â»×¤Ã¤Æ¤¤¤Þ¤¹¡£
»Ï¤á¤ë¤¿¤á¤Ë¤Ï¾¯¤·¤Ð¤«¤ê·×²è¤òΩ¤Æ¤Ê¤¯¤Æ¤Ï¤Ê¤ê¤Þ¤»¤ó¡£
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¥Í¥Ã¥È¥ï¡¼¥¯¤ÎÈϰϤò³ä¤êÅö¤Æ¤ë¤³¤È¤Ë¤·¤Þ¤¹¡£¤½¤³¤Ç¡¢192.168.10.0
¤È 192.168.11.0 ¥Í¥Ã¥È¤òͽÌó¤·¤Þ¤¹¡£¼«Âð¥æ¡¼¥¶¤ËÂФ·¤Æ¤â
VPN ¥µ¡¼¥Ð¦¤Ç¥Þ¥¹¥«¥ì¡¼¥É¤¹¤ëɬÍפΤʤ¤½½Ê¬¤Ê¿ô¤ò³ÎÊݤ¹¤ë¤³¤È¤Ë¤·¤Þ¤¹¡£
³Æ¥¯¥é¥¤¥¢¥ó¥È¤Ï¤½¤ì¼«¿È¤ÎÆâÉô IP ¤ò¼èÆÀ¤·¤Þ¤¹¡£¤½¤³¤Ç¡¢¤½¤Î¤¿¤á¤Ë
¾¤Î¥¯¥é¥¹ C¡¢192.168.40.0 ¤òͽÌ󤹤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£
º£¤ä¤é¤Ê¤¯¤Æ¤Ï¤Ê¤é¤Ê¤¤¤Î¤Ï¡¢¥ë¡¼¥¿¤Ë¤½¤ì¤é¤ÎÈϰϤòÄɲ乤뤳¤È¤Ç¤¹¡£
»ä¤¿¤Á¤Î²ñ¼Ò¤¬¡¢OC1 ¤òÄ̲᤹¤ë¥È¥é¥Õ¥£¥Ã¥¯Á´¤Æ¤ò¼è¤ê°·¤¦¾®¤µ¤Ê Cisco
(192.168.254.254) ¤ò½êÍ­¤·¤Æ¤¤¤ë¤È»×¤Ã¤Æ¤¯¤À¤µ¤¤¡£¤½¤ì¤é¤ÎͽÌ󤵤줿
¥Í¥Ã¥È¤«¤é VPN ¥µ¡¼¥Ð (192.168.40.254) ¤Ø¸þ¤«¤¦¥È¥é¥Õ¥£¥Ã¥¯¤ò
Cisco ¾å¤Ç·ÐÏ©ÀßÄꤷ¤Æ¤¯¤À¤µ¤¤¡£
»ä¤Ï¸å¤ÇÌÀ¤«¤¹Íýͳ¤Î¤¿¤á¡¢VPN ¥µ¡¼¥Ð¤ò¼«Âð¥æ¡¼¥¶¤Î¥Í¥Ã¥È¤ËÁȤßÆþ¤ì¤Þ¤¹¡£
¥µ¡¼¥Ð¤Î³°Éô¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤Ï vpn.mycompany.com ¡¢
ÆâÉô¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤Ï vpn-internal.mycompany.com ¤È̾¤Å¤±¤ë¤³¤È¤Ë
¤·¤Þ¤¹¡£ 
<P>³°ÉôÈÖ¹æ¤Ë¤Ä¤¤¤Æ¡¢¤Ï¤Ã¤­¤ê¤ÈÃΤäƤª¤¯É¬ÍפϤ¢¤ê¤Þ¤»¤ó¡£
ISP ¤Ë¤è¤Ã¤Æ³ä¤êÅö¤Æ¤é¤ì¤¿¼«Ê¬¼«¿È¤ÎÈÖ¹æ¤òÃΤäƤ¤¤ë¤Ù¤­¤Ç¤¹¡£
<H2><A NAME="ss5.2">5.2 ¥Ä¡¼¥ë¤ò½¸¤á¤ë</A>
</H2>

<P>¿¾¯¡¢¥½¥Õ¥È¥¦¥§¥¢¤¬É¬ÍפˤʤäƤ­¤Þ¤·¤¿¡£
¼¡¤Ëµó¤²¤ë¥Ñ¥Ã¥±¡¼¥¸¤ò¼èÆÀ¤·¤Æ¡¢»ØÄꤵ¤ì¤¿¾ì½ê¤Ë¥¤¥ó¥¹¥È¡¼¥ë¤·¤Æ¤¯¤À¤µ¤¤¡£
<H3>¥µ¡¼¥Ð¤ËÂФ·¤Æ - </H3>

<P>
<UL>
<LI>pppd (¥Ð¡¼¥¸¥ç¥ó 2.3 °Ê¹ß)</LI>
<LI>ssh (¥Ð¡¼¥¸¥ç¥ó 1.2.26 °Ê¹ß)</LI>
</UL>
<H3>¥¯¥é¥¤¥¢¥ó¥È¤ËÂФ·¤Æ - </H3>

<P>
<UL>
<LI>pppd (¥µ¡¼¥Ð¤ÈƱ¤¸¥Ð¡¼¥¸¥ç¥ó)</LI>
<LI>ssh</LI>
<LI>
<A HREF="ftp://ftp.vein.hu/ssa/contrib/mag/pty-redir-0.1.tar.gz">pty-redir</A></LI>
</UL>
<H2><A NAME="ss5.3">5.3 ¥µ¡¼¥Ð - ¥«¡¼¥Í¥ë¤ò¹½ÃÛ¤¹¤ë</A>
</H2>

<P>ºÇ½é¤Ë¡¢Â¿Ê¬¡¢¤¢¤Ê¤¿¤Ï¥µ¡¼¥Ð¤Î¤¿¤á¤Ë¥«¡¼¥Í¥ë¤òºÆ¹½ÃÛ¤¹¤ëɬÍפ¬¤¢¤ë¤Ç¤·¤ç¤¦¡£
´ðËܥͥåȥ¥¯¤ä¤½¤Î¾¤ÎɬÍפʹàÌܤ˲䨤ơ¢É¬¤º°Ê²¼¤Î¥ª¥×¥·¥ç¥ó¤ò¥ª¥ó¤Ë¤·¤Æ¤¯¤À¤µ¤¤¡£
¤â¤·°ÊÁ°¤Ë¥«¡¼¥Í¥ë¤ò¹½ÃÛ¤·¤¿¤³¤È¤¬¤Ê¤±¤ì¤Ð¡¢
<A HREF="http://www.linuxdoc.org/HOWTO/Kernel-HOWTO.html">Kernel HOWTO</A>¤òÆɤó¤Ç¤¯¤À¤µ¤¤¡£
[ÌõÃí¡§ÆüËܸìÌõ¤Ï 
<A HREF="http://www.linux.or.jp/JF/JFdocs/Kernel-HOWTO.html">http://www.linux.or.jp/JF/JFdocs/Kernel-HOWTO.html</A> ¤Ë¤¢¤ê¤Þ¤¹¡£]
<P>2.0 ¥«¡¼¥Í¥ë¤ËÂФ·¤Æ - 
<UL>
<LI>CONFIG_FIREWALL</LI>
<LI>CONFIG_IP_FORWARD</LI>
<LI>CONFIG_IP_FIREWALL</LI>
<LI>CONFIG_IP_ROUTER</LI>
<LI>CONFIG_PPP</LI>
</UL>
<P>2.2 ¥«¡¼¥Í¥ë¤ËÂФ·¤Æ - 
<UL>
<LI>CONFIG_FIREWALL</LI>
<LI>CONFIG_IP_ADVANCED_ROUTER</LI>
<LI>CONFIG_IP_FIREWALL</LI>
<LI>CONFIG_IP_ROUTER</LI>
<LI>CONFIG_PPP</LI>
</UL>
<H2><A NAME="ss5.4">5.4 ¥µ¡¼¥Ð - ¥Í¥Ã¥È¥ï¡¼¥¯¤òÀßÄꤹ¤ë</A>
</H2>

<P>¥Í¥Ã¥È¥ï¡¼¥¯¥«¡¼¥É 1 Ë礷¤«¤Ê¤¤¥µ¡¼¥Ð¤ò¹½ÃÛ¤·¤è¤¦¤È¤·¤Æ¤¤¤ë¤Î¤Ç¤¢¤ì¤Ð¡¢
¤â¤¦ 1 ËçÇã¤Ã¤Æ¡¢¿·¤¿¤ËÇÛÀþ¤¹¤ë¤³¤È¤ò¸¡Æ¤¤¹¤ë¤è¤¦´«¤á¤Þ¤¹¡£
¥Í¥Ã¥È¥ï¡¼¥¯¤ÎÈó¸ø³«À­¤ò¤½¤Î¤Þ¤Þ¤Ë¤·¤Æ¤ª¤¯°ìÈÖÎɤ¤ÊýË¡¤Ï¡¢¤½¤ì¤ò
¤½¤ì¼«¿È¤ÎÀþ¤Ë³ä¤êÅö¤Æ¤ë¤³¤È¤Ç¤¹¡£¤â¤· 2 Ëç¤Î¥Í¥Ã¥È¥ï¡¼¥¯¥«¡¼¥É
¤ò»ý¤Ã¤Æ¤¤¤ë¤Î¤Ç¤¢¤ì¤Ð¡¢¤½¤ì¤¾¤ì¤ÎÀßÄêÊýË¡¤òÃΤëɬÍפ¬¤¢¤ê¤Þ¤¹¡£
»ä¤¿¤Á¤Ï³°Éô¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤Ë eth0¡¢ÆâÉô¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤Ë eth1 ¤ò»È¤¤¤Þ¤¹¡£
<H3>¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤òÀßÄꤹ¤ë</H3>

<P>ºÇ½é¤Ë¥µ¡¼¥Ð¤Î³°Éô¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤òÀßÄꤹ¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£
´û¤Ë¤É¤¦¤¹¤ì¤ÐÎɤ¤¤«ÃΤäƤ¤¤ë¤Ï¤º¤Ç¤¹¤·¡¢Â¿Ê¬¡¢´û¤ËÀßÄꤷ¤Æ¤·¤Þ¤Ã¤¿»ö¤Ç¤·¤ç¤¦¡£
¤Þ¤À¤Ç¤¢¤ì¤Ð¡¢¤¹¤°¤Ë¤ä¤Ã¤Æ¤¯¤À¤µ¤¤¡£¤É¤¦¤¹¤ì¤ÐÎɤ¤¤«Ê¬¤«¤é¤Ê¤±¤ì¤Ð¡¢Ìá¤Ã¤Æ
<A HREF="http://www.linuxdoc.org/HOWTO/NET3-4-HOWTO.html">Networking HOWTO</A>
¤òÆɤó¤Ç¤¯¤À¤µ¤¤¡£
<P>¤Ç¤ÏÆâÉô¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤òÀßÄꤷ¤Þ¤¹¡£ÈÖ¹æ¤Ï»ä¤¿¤Á¤ÎÁªÂò¤Ë¤è¤Ã¤Æ¡¢
¥µ¡¼¥Ð¤ÎÆâÉô¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤¬ 192.168.40.254 ¤Ç¤¹¡£
¤Ç¤Ï¤½¤Î¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤òÀßÄꤷ¤Þ¤·¤ç¤¦¡£
<P>2.0 ¥«¡¼¥Í¥ë¤Ç¤Ï¼¡¤ò»È¤Ã¤Æ¤¯¤À¤µ¤¤ - 
<P>
<PRE>
# /sbin/ifconfig eth1 192.168.40.254 netmask 255.255.255.0 broadcast 192.168.40.255
# /sbin/route add -net 192.168.40.0 netmask 255.255.255.0 dev eth1
</PRE>
<P>2.2 ¥«¡¼¥Í¥ë¤Ç¤Ï¼¡¤ò»È¤Ã¤Æ¤¯¤À¤µ¤¤ - 
<P>
<PRE>
# /sbin/ifconfig eth1 192.168.40.254 netmask 255.255.255.0 broadcast 192.168.40.255
</PRE>
<P>¤½¤ì¤Ç´ðËÜ¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤¬ÍѰդǤ­¤Þ¤¹¡£¤³¤ì¤ÇξÊý¤Î
¥í¡¼¥«¥ë¥Í¥Ã¥È¥ï¡¼¥¯¤Ë¤è¤Ã¤Æ¥µ¡¼¥Ð¤Ë·Ò¤¬¤Ã¤¿¥Þ¥·¥ó¤ËÏä·¤«¤±¤ë¤³¤È¤¬
¤Ç¤­¤Þ¤¹¡£
<H3>·ÐÏ©¤òÀßÄꤹ¤ë</H3>

<P>»ä¤¿¤Á¤Ï¥í¡¼¥«¥ë¥Í¥Ã¥È¤Ë¤¢¤ë¥Þ¥·¥ó¤ÈÏ乤³¤È¤Ï¤Ç¤­¤ëÍͤˤʤê¤Þ¤·¤¿¤¬¡¢
ÆâÉô¥Í¥Ã¥È¥ï¡¼¥¯¤Î»Ä¤ê¤È¤ÏÏ乤³¤È¤¬¤Ç¤­¤Þ¤»¤ó¡£
¤½¤¦¤¹¤ë¤Ë¤Ï¤â¤¦¿ô¹Ô¥³¡¼¥É¤¬É¬ÍפǤ¹¡£Â¾¤Î¥µ¥Ö¥Í¥Ã¥È¤Ë¤¢¤ë¤Û¤«¤Î¥Þ¥·¥ó
¤ËÅþ㤹¤ë¤¿¤á¤Ë¤Ï¡¢¥È¥é¥Õ¥£¥Ã¥¯¤¬ Cisco ¥ë¡¼¥¿¤Ë¸þ¤«¤¦¤è¤¦¤Ê·ÐÏ©¤ò
ÃΤëɬÍפ¬¤¢¤ê¤Þ¤¹¡£¼¡¤Î¤è¤¦¤Ë¤·¤Þ¤¹ - 
<PRE>
# /sbin/route add -net 192.168.0.0 gw 192.168.254.254 netmask 255.255.0.0 dev eth1
</PRE>
<P>¤½¤Î¹Ô¤Ï¡¢192.168.0.0 ¥Í¥Ã¥È¥ï¡¼¥¯¤Ë¹Ô¤¯¤³¤È¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤¤¤¯¤Ä¤«¤Î¥È¥é¥Õ¥£¥Ã¥¯
¤Ï eth1 ¤ò½Ð¤ë¤Ù¤­¤Ç¡¢¤½¤ì¤Ï Cisco ¤ËÅÁ¤¨¤é¤ì¤ë¤Ù¤­¤Ç¤¢¤ë¤È¤¤¤¦¤³¤È¤ò
¥«¡¼¥Í¥ë¤ËÅÁ¤¨¤Þ¤¹¡£
¥ë¡¼¥Æ¥£¥ó¥°¥Æ¡¼¥Ö¥ë¤¬¥Í¥Ã¥È¥Þ¥¹¥¯¤Î¥µ¥¤¥º¤Ç·è¤á¤é¤ì¤ë¤¿¤á¡¢
¥í¡¼¥«¥ë¥Í¥Ã¥È¤Ë¸þ¤«¤¦¥È¥é¥Õ¥£¥Ã¥¯¤Ë¤Ï¡¢¤Þ¤À¸þ¤«¤¦¤Ù¤­¾ì½ê¤¬Ê¬¤«¤Ã¤Æ¤¤¤Þ¤¹¡£
¤â¤·Â¾¤Ë¤â¥Í¥Ã¥È¥ï¡¼¥¯¤ÎÃæ¤ËÆâÉôŪ¤Ê¥Í¥Ã¥È¥ï¡¼¥¯¤¬¤¢¤ë¤Ê¤é¡¢¤½¤ì¤¾¤ì¤Ë
ÂФ·¤Æ¡¢¾åµ­¤Î¤è¤¦¤Ê»ØÄê¤ò¤¹¤ë¤³¤È¤Ë¤Ê¤ê¤Þ¤¹¡£
<H3>¥Õ¥£¥ë¥¿µ¬Â§¤òºîÀ®¤¹¤ë</H3>

<P>OK, ɬÍפȤµ¤ìÆÀ¤ë¥Þ¥·¥óÁ´¤Æ¤ËÅþã¤Ç¤­¤ë¤è¤¦¤Ë¤Ê¤ê¤Þ¤·¤¿¡£
º£Å٤ϡ¢VPN ¥µ¡¼¥Ð¤òÄ̤·¤Æ¥¢¥¯¥»¥¹¤òµö¤¹¤«µö¤µ¤Ê¤¤¤«¤È¤¤¤¦¡¢
¥Õ¥¡¥¤¥¢¥¦¥©¡¼¥ë¤Î¥Õ¥£¥ë¥¿µ¬Â§¤òµ­½Ò¤·¤Ê¤¯¤Æ¤Ï¤Ê¤ê¤Þ¤»¤ó¡£
<P><CODE>ipfwadm</CODE> ¤Çµ¬Â§¤ò»ØÄꤹ¤ë¤Ë¤Ï¡¢¼¡¤Î¤è¤¦¤Ë¤·¤Þ¤¹ - 
<P>
<PRE>
# /sbin/ipfwadm -F -f
# /sbin/ipfwadm -F -p deny
# /sbin/ipfwadm -F -a accept -S 192.168.40.0/24 -D 192.168.0.0/16
# /sbin/ipfwadm -F -a accept -b -S 192.168.10.0/24 -D 192.168.0.0/16
# /sbin/ipfwadm -F -a accept -b -S 192.168.11.0/24 -D 192.168.0.0/16
</PRE>
<P><CODE>ipchains</CODE> ¤Çµ¬Â§¤ò»ØÄꤹ¤ë¤Ë¤Ï¡¢¼¡¤Î¤è¤¦¤Ë¤·¤Þ¤¹ - 
<P>
<PRE>
# /sbin/ipchains -F forward
# /sbin/ipchains -P forward DENY
# /sbin/ipchains -A forward -j ACCEPT -s 192.168.40.0/24 -d 192.168.0.0/16
# /sbin/ipchains -A forward -j ACCEPT -b -s 192.168.10.0/24 -d 192.168.0.0/16
# /sbin/ipchains -A forward -j ACCEPT -b -s 192.168.11.0/24 -d 192.168.0.0/16
</PRE>
<P>¤³¤ì¤Ï¥«¡¼¥Í¥ë¤Ë¡¢192.168.40.0/24 ¥Í¥Ã¥È¥ï¡¼¥¯¤«¤éÍè¤Æ 192.168.0.0/16
¥Í¥Ã¥È¥ï¡¼¥¯¤Ë¸þ¤«¤¦¤â¤Î¤ò½ü¤¤¤¿¡¢Á´¤Æ¤Î¥È¥é¥Õ¥£¥Ã¥¯¤òµñÀ䤹¤ë¤è¤¦¤Ë
ÅÁ¤¨¤Þ¤¹¡£¤½¤ì¤Ï¤Þ¤¿¡¢192.168.10.0/24 ¤È 192.168.0.0/16 ¥Í¥Ã¥È¤È¤Î´Ö¤Ç
¤ä¤ê¤È¤ê¤µ¤ì¤ë¥È¥é¥Õ¥£¥Ã¥¯¤òµö²Ä¤¹¤ë¤È¤¤¤¦¤³¤È¤ò¤âÅÁ¤¨¤Þ¤¹¡£
192.168.11.0 ¥Í¥Ã¥È¤ËÂФ·¤Æ¤âƱÍͤǤ¹¡£¤³¤ì¤é¤ÎºÇ¸å 2 ¤Ä¤ÏÁÐÊý¸þ¤Îµ¬Â§¤Ç¡¢
¤³¤ì¤ÏÁÐÊý¸þ¤Ë¤ä¤ê¤È¤ê¤Ç¤­¤ë¤è¤¦·ÐÏ©¤òÄê¤á¤ë¤¿¤á¤Ë¤Ï½ÅÍפʤ³¤È¤Ç¤¹¡£
<H3>·ÐÏ©¤òÀßÄꤹ¤ë</H3>

<P>¼«Âð¥æ¡¼¥¶¤Ë¤È¤Ã¤Æ¤Ï¡¢¤³¤³¤Þ¤Ç¤ÇÁ´¤Æ¤¬¤¦¤Þ¤¯Æ°ºî¤¹¤ë¤Ç¤·¤ç¤¦¡£
¤·¤«¤·¡¢Î¥¤ì¤¿½ê¤Ë¤¢¤ë¥ª¥Õ¥£¥¹¤Î¤¿¤á¤Ë¤Ï¤¤¤¯¤é¤«·ÐÏ©¤òÀßÄꤷ¤Ê¤¯¤Æ¤Ï¤Ê¤ê¤Þ¤»¤ó¡£
¤Þ¤ººÇ½é¤Ë¡¢¥á¥¤¥ó¥ë¡¼¥¿¡¢¤¹¤Ê¤ï¤Á Cisco ¤Ë¡¢Î¥¤ì¤¿½ê¤Ë¤¢¤ë¥ª¥Õ¥£¥¹
¤Ï VPN ¥µ¡¼¥Ð¤Î±Æ¤Ë±£¤ì¤Æ¤¤¤ë¤È¤¤¤¦¤³¤È¤ò¶µ¤¨¤Æ¤ä¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£
¤Ç¤¹¤«¤é Cisco ¤ËÂФ·¤Æ¡¢Î¥¤ì¤¿½ê¤Ë¤¢¤ë¥ª¥Õ¥£¥¹¹Ô¤­¤Î¥È¥é¥Õ¥£¥Ã¥¯¤ò
VPN ¥µ¡¼¥Ð¤ËÁ÷¤ë¤è¤¦¤Ê·ÐÏ©¤ò»ØÄꤷ¤Æ¤¯¤À¤µ¤¤¡£
¤½¤ì¤¬¤¹¤ó¤À¤é¡¢º£ÅÙ¤ÏÎ¥¤ì¤¿¥ª¥Õ¥£¥¹¤Ë¸þ¤«¤¦¥È¥é¥Õ¥£¥Ã¥¯¤ò¤É¤¦¤¹¤Ù¤­¤«
VPN ¥µ¡¼¥Ð¤Ë¶µ¤¨¤Æ¤ä¤é¤Ê¤¯¤Æ¤Ï¤Ê¤ê¤Þ¤»¤ó¡£
¤³¤ì¤ò¤¹¤ë¤Ë¤Ï <CODE>route</CODE> ¥³¥Þ¥ó¥É¤ò¥µ¡¼¥Ð¤Ç¼Â¹Ô¤·¤Þ¤¹¡£
<CODE>route</CODE> ¥³¥Þ¥ó¥É¤òÆ°ºî¤µ¤»¤ë¾å¤Ç¤ÎÍ£°ì¤ÎÌäÂê¤Ï¡¢
¥ê¥ó¥¯¤Ï³ÎΩ¤µ¤ì¤Æ¤¤¤Ê¤¯¤Æ¤Ï¤Ê¤é¤º¡¢¤â¤·ÀÚ¤ì¤Æ¤·¤Þ¤¦¤È·ÐÏ©¤¬¼º¤ï¤ì¤Æ
¤·¤Þ¤¦¤È¤¤¤¦¤³¤È¤Ç¤¹¡£²ò·èºö¤Ï¡¢¥¯¥é¥¤¥¢¥ó¥È¤¬Àܳ¤·¤Æ¤­¤¿¤é
·ÐÏ©¤òÄɲ䷤Ƥä¤ë¡¢¤¢¤ë¤¤¤Ï¡¢route ¥³¥Þ¥ó¥É¤ÏɬÍװʾå¤Ë¼Â¹Ô¤·¤Æ¤âÌäÂê̵¤¤¤Î¤Ç¡¢
¤è¤ê´Êñ¤ÊÊýË¡¤È¤·¤Æ¤Ï¡¢¤½¤ì¤òÅÙ¡¹¼Â¹Ô¤·¤Æ¤ä¤ë¤³¤È¤Ç¤¹¡£
¤Ç¤Ï¡¢¥¹¥¯¥ê¥×¥È¤òºîÀ®¤·¤Æ¡¢¿ôʬËè¤Ë¼Â¹Ô¤µ¤ì¤ë¤è¤¦¤½¤ì¤ò crontab 
¤Ë²Ã¤¨¤Æ¤¯¤À¤µ¤¤¡£¤½¤ÎÃæ¤Ë¤Ï¼¡¤Î¤è¤¦¤Ë½ñ¤¤¤Æ¤¯¤À¤µ¤¤ - 
<P>
<PRE>
/sbin/route add -net 192.168.11.0 gw 192.168.10.253 netmask 255.255.255.0
/sbin/route add -net 192.168.10.0 gw 192.168.11.253 netmask 255.255.255.0
</PRE>
<H2><A NAME="ss5.5">5.5 ¥µ¡¼¥Ð - <CODE>pppd</CODE> ¤òÀßÄꤹ¤ë</A>
</H2>

<P>¤µ¤Æº£ÅÙ¤Ï VPN Àܳ¤ò¼è¤ê°·¤¦¤¿¤á¤Ë¥µ¡¼¥Ð¤Î pppd ¤òÀßÄꤷ¤Þ¤·¤ç¤¦¡£
¤â¤·¤³¤Î¥µ¡¼¥Ð¤ò¡¢¥À¥¤¥ä¥ë¥¢¥Ã¥×¥æ¡¼¥¶¤ò½èÍý¤¹¤ë¤Î¤Ë»È¤Ã¤Æ¤¤¤ë¡¢
¤¢¤ë¤¤¤Ï¤¢¤Ê¤¿¼«¿È¤¬¥À¥¤¥ä¥ë¤¹¤ë¤Î¤Ë»È¤Ã¤Æ¤¤¤ë¤Î¤Ç¤¢¤ì¤Ð¡¢¤³¤ì¤é¤Î
Êѹ¹¤¬¤½¤ì¤é¤Î¥µ¡¼¥Ó¥¹¤Ë±Æ¶Á¤òÍ¿¤¨¤ë¤«¤â¤·¤ì¤Ê¤¤¤È¤¤¤¦¤³¤È¤ò³Ð¤¨¤Æ
¤ª¤¯¤Ù¤­¤Ç¤¹¡£¤³¤Î¥»¥¯¥·¥ç¥ó¤ÎºÇ¸å¤Ç¡¢¤¤¤«¤Ë¤·¤Æ¾×Æͤò²óÈò¤¹¤ë¤«¸¡Æ¤
¤·¤Þ¤¹¡£
<H3><CODE>/etc/ppp/</CODE> </H3>

<P>¤³¤Î¥Ç¥£¥ì¥¯¥È¥ê¤Ë¤Ï¤¿¤¯¤µ¤ó¤Î¥Õ¥¡¥¤¥ë¤¬¤¢¤ë¤«¤â¤·¤ì¤Þ¤»¤ó¡£Â¿Ê¬
¤¢¤Ê¤¿¤Ï´û¤Ë¡¢<CODE>options</CODE> ¤È¸Æ¤Ð¤ì¤ë¥Õ¥¡¥¤¥ë¤ò»ý¤Ã¤Æ¤¤¤ë
¤Ç¤·¤ç¤¦¡£¤³¤Î¥Õ¥¡¥¤¥ë¤Ë¤Ï <CODE>pppd</CODE> ¤ËÂФ¹¤ëÂç°èŪ¤Ê¥ª¥×¥·¥ç¥ó
¤ÎÁ´¤Æ¤¬Æþ¤Ã¤Æ¤¤¤Þ¤¹¡£¤³¤ì¤é¤Î¥ª¥×¥·¥ç¥ó¤Ï <CODE>pppd</CODE> ¤Î
¥³¥Þ¥ó¥É¥é¥¤¥ó¤Ç̵¸ú¤Ë¤¹¤ë¤³¤È¤Ï¤Ç¤­¤Þ¤»¤ó¡£
<H3><CODE>/etc/ppp/options</CODE> </H3>

<P><CODE>options</CODE> ¥Õ¥¡¥¤¥ë¤Ï¾¯¤Ê¤¯¤È¤â¼¡¤Î¤è¤¦¤Êµ­½Ò¤ò
´Þ¤ó¤Ç¤¤¤ë¤Ï¤º¤Ç¤¹ - 
<P>
<PRE>
ipcp-accept-local
ipcp-accept-remote
proxyarp
noauth
</PRE>
<P>ºÇ½é¤Î 2 ¹Ô¤Ï <CODE>pppd</CODE> ¤Ë¡¢Â¾¤Îü¤¬ IP ¥¢¥É¥ì¥¹¤È¤·¤Æ»ØÄꤷ¤¿¤â¤Î¤ò
¼õ¤±Æþ¤ì¤ë¤è¤¦»Ø¼¨¤·¤Þ¤¹¡£¤³¤ì¤ÏÎ¥¤ì¤¿½ê¤Ë¤¢¤ë¥ª¥Õ¥£¥¹¤ËÀܳ¤¹¤ë¤È¤­¤Ë¤Ï
ɬÍפǤ¹¤¬¡¢¤·¤«¤·¼«Âð¤Î¥æ¡¼¥¶¤ËÀܳ¤·¤Æ¤¤¤ë¤Î¤Ê¤é¤Ð̵¸ú¤Ë¤¹¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£
¤½¤ì¤Ï¥µ¡¼¥Ð¤¬¥¢¥É¥ì¥¹¤ò³ä¤êÅö¤Æ¤ë¤³¤È¤ò˸¤²¤Ï¤·¤Þ¤»¤ó¤Î¤ÇÍ­¸ú¤Ë¤·¤Æ¤ª¤¤¤Æ
¹½¤¤¤Þ¤»¤ó¡£¤½¤ì¤Ï¥¯¥é¥¤¥¢¥ó¥È¤¬µá¤á¤Æ¤­¤¿¤³¤È¤ò¼õ¤±Æþ¤ì¤ÆÎɤ¤
¤È¤¤¤¦¤³¤È¤òÅÁ¤¨¤ë¤À¤±¤Ç¤¹¡£
<P>3 ¹ÔÌܤÏÈó¾ï¤Ë½ÅÍפǤ¹¡£<CODE>pppd</CODE> ¤Î¥Þ¥Ë¥å¥¢¥ë¥Ú¡¼¥¸¤Ë¤è¤ë¤È - 
<P>
<PRE>
proxyarp
       ¤³¤Î¥·¥¹¥Æ¥à¤Î ARP [Address Resolution Protocol] ¥Æ¡¼¥Ö¥ë¤ËÂФ·¤Æ
       ¥Ô¥¢¤Î IP ¥¢¥É¥ì¥¹¤È¤³¤Î¥·¥¹¥Æ¥à¤Î¥¤¡¼¥µ¥Í¥Ã¥È¥¢¥É¥ì¥¹¤òÉÕ¤±²Ã¤¨¤Þ¤¹¡£
       ¤³¤ì¤Ë¤è¤Ã¤Æ¡¢¥Ô¥¢¤¬Â¾¤Î¥·¥¹¥Æ¥à¤«¤é¸«¤Æ¥í¡¼¥«¥ë¤Ê¥¤¡¼¥µ¥Í¥Ã¥È¤Ë
       ¤¢¤ë¤è¤¦¤Ë¸«¤¨¤ë¤È¤¤¤¦¸ú²Ì¤¬¤â¤¿¤é¤µ¤ì¤Þ¤¹¡£
</PRE>
<P>¤½¤ì¤¬°Ù¤µ¤ì¤Æ¤¤¤Ê¤±¤ì¤Ð ¥í¡¼¥«¥ë¤Ê¥È¥é¥Õ¥£¥Ã¥¯¤¬¥È¥ó¥Í¥ë¤òÄ̤äÆ
Ìá¤Ã¤ÆÍè¤ì¤Ê¤¯¤Ê¤ë¤¿¤á¡¢¤³¤ì¤ÏÈó¾ï¤Ë½ÅÍפǤ¹¡£
<P>ºÇ¸å¤Î¹Ô¤âƱ¤¸¤¯½ÅÍפǤ¹¡£¤³¤ì¤Ï <CODE>pppd</CODE> ¤Ë¥æ¡¼¥¶Ì¾¤È¥Ñ¥¹¥ï¡¼¥É
̵¤·¤ÇÀܳ¤òµö¤¹¤è¤¦»Ø¼¨¤·¤Þ¤¹¡£¤³¤ì¤Ï <CODE>sshd</CODE> ¤Ë¤è¤Ã¤Æ´û¤Ë
ǧ¾Ú¤¬°Ù¤µ¤ì¤Æ¤¤¤ë¤Î¤Ç°ÂÁ´¤Ç¤¹¡£
<H3>¾×Æͤò²óÈò¤¹¤ë </H3>

<P>¤â¤·¤¢¤Ê¤¿¤¬ <CODE>pppd</CODE> ¤Ç¾¤Î¥µ¡¼¥Ó¥¹¤ò°·¤Ã¤Æ¤¤¤ë¤Ê¤é¡¢¤½¤ì¤é¤Î
¾¤Î¥µ¡¼¥Ó¥¹¤ÎÀßÄê¤Ï VPN ¥·¥¹¥Æ¥à¤¬É¬ÍפȤ·¤Æ¤¤¤ë¤â¤Î¤È¤Ï°Û¤Ê¤Ã¤Æ¤¤¤ë¤«¤â
ÃΤì¤Ê¤¤¤È¤¤¤¦¤³¤È¤ò¹Í¤¨¤Æ¤ß¤ë¤Ù¤­¤Ç¤¹¡£<CODE>pppd</CODE> ¤Ï 
<CODE>/etc/ppp/options</CODE> ¥á¥¤¥ó¥ª¥×¥·¥ç¥ó¥Õ¥¡¥¤¥ë¤ÎÃæ¤Î¥ª¥×¥·¥ç¥ó
¤Ï¼Â¹Ô»þ¤Ë»ØÄꤵ¤ì¤¿¥ª¥×¥·¥ç¥ó¤Ë¤è¤Ã¤Æ̵¸ú¤Ë¤Ç¤­¤Ê¤¤¤è¤¦¤ËÀ߷פµ¤ì¤Æ
¤¤¤Þ¤¹¡£¤³¤ì¤Ï¥»¥­¥å¥ê¥Æ¥£¾å¤ÎÍýͳ¤Ëµò¤ê¤Þ¤¹¡£¾×ÆͤòÈò¤±¤ë¤¿¤á¡¢
¤É¤Î¥ª¥×¥·¥ç¥ó¤¬¾×Æͤòµ¯¤³¤·¤Æ¤¤¤ë¤«ÆÃÄꤷ¤Æ²¼¤µ¤¤¡£¤½¤·¤Æ¤½¤ì¤é¤ò
¥á¥¤¥ó¥Õ¥¡¥¤¥ë¤«¤é <CODE>pppd</CODE> ¤ÎÆÃÄê¤Î¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¼Â¹ÔÃæ¤Ë
¥í¡¼¥É¤µ¤ì¤ëʬΥ¤µ¤ì¤¿¥ª¥×¥·¥ç¥ó¥Õ¥¡¥¤¥ë¤Ë°Ü¤·¤Æ¤¯¤À¤µ¤¤¡£
<H2><A NAME="ss5.6">5.6 ¥µ¡¼¥Ð - <CODE>sshd</CODE> ¤òÀßÄꤹ¤ë</A>
</H2>

<P>¼¡¤Ëµó¤²¤ë¤Î¤Ï»ä¤Î <CODE>/etc/sshd_config</CODE>¥Õ¥¡¥¤¥ë¤ÎÆâÍƤǤ¹¡£
¤¢¤Ê¤¿¤Î¥Õ¥¡¥¤¥ë¤â¡¢Æ±¤¸¤«¡¢¤Þ¤¿¤Ï»÷¤¿·Á¼°¤ò¤·¤Æ¤¤¤ë¤Ï¤º¤Ç¤¹ - 
<P>
<PRE>
# This is the ssh server system wide configuration file.

Port 22
ListenAddress 0.0.0.0
HostKey /etc/ssh_host_key
RandomSeed /etc/ssh_random_seed
ServerKeyBits 768
LoginGraceTime 600
KeyRegenerationInterval 3600
PermitRootLogin yes
IgnoreRhosts yes
StrictModes yes
QuietMode no
FascistLogging yes
CheckMail no
IdleTimeout 3d
X11Forwarding no
PrintMotd no
KeepAlive yes
SyslogFacility DAEMON
RhostsAuthentication no
RhostsRSAAuthentication no
RSAAuthentication yes
PasswordAuthentication no
PermitEmptyPasswords no
UseLogin no
</PRE>
<P>µ¤¤ò¤Ä¤±¤Æ¤ª¤¯¤Ù¤­½ÅÍפÊÅÀ¤Ï¡¢¥Ñ¥¹¥ï¡¼¥Éǧ¾Ú¤Ï &quot;r&quot; ¥µ¡¼¥Ó¥¹Á´¤Æ
¤Ë¤ª¤¤¤Æ̵¸ú¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤È¤¤¤¦¤³¤È¤Ç¤¹¡£»ä¤Ï¡¢¥á¡¼¥ë¥Á¥§¥Ã¥¯¤ä¤½¤ÎÆü¤Î
¥á¥Ã¥»¡¼¥¸¤â¡¢¥¯¥é¥¤¥¢¥ó¥È¦¤«¤é <CODE>pppd</CODE> ¤òº®Í𤵤»ÆÀ¤ë¤Î¤Ç
̵¸ú¤Ë¤·¤Æ¤¤¤Þ¤¹¡£root ¥í¥°¥¤¥ó¤Ïµö²Ä¤·¤Æ¤¤¤Þ¤¹¤¬¡¢¤½¤ì¤Ï¥­¡¼¤Ê¤·¤Ë¤Ï¼Â¹Ô¤Ç¤­¤Ê¤¤¤¿¤á¡¢
½½Ê¬¤Ë°ÂÁ´¤Ç¤¹¡£
<H2><A NAME="user-accounts"></A> <A NAME="ss5.7">5.7 ¥µ¡¼¥Ð - ¥æ¡¼¥¶¥¢¥«¥¦¥ó¥È¤òÀßÄꤹ¤ë </A>
</H2>

<P>¼¡¤Ï¥æ¡¼¥¶¥¢¥«¥¦¥ó¥È¤òÀßÄꤷ¤Þ¤¹¡£
<H3><CODE>vpn-users</CODE> ¥°¥ë¡¼¥×¤òÄɲ乤ë</H3>

<P>¼Â¹Ô¤·¤Æ¤¯¤À¤µ¤¤¡£
<P>
<PRE>
# /usr/sbin/groupadd vpn-users
</PRE>
<P>¤Ç¤Ï <CODE>/etc/group</CODE> ¥Õ¥¡¥¤¥ë¤ò cat ¤·¤ÆºÇ¸å¤Î¹Ô¤ò¸«¤Æ¤¯¤À¤µ¤¤¡£
¤½¤ì¤Ï vpn-users ¥°¥ë¡¼¥×¤Î¤¿¤á¤Î¥¨¥ó¥È¥ê¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤Ï¤º¤Ç¤¹¡£
3 ÈÖÌܤΥե£¡¼¥ë¥É¤ËÃí°Õ¤·¤Æ¤¯¤À¤µ¤¤¡£¤³¤ì¤Ï¥°¥ë¡¼¥× ID (GID) ¤Ç¤¹¡£
¤¹¤°¤ËɬÍפˤʤë¤Î¤Ç¤½¤ì¤ò½ñ¤­Î±¤á¤Æ¤ª¤¤¤Æ¤¯¤À¤µ¤¤¡£
¤³¤ÎÎã¤Ç¤Ï GID ¤Ï 101 ¤Ç¤¹¡£
<H3><CODE>vpn-users</CODE> ¤Î¥Û¡¼¥à¥Ç¥£¥ì¥¯¥È¥ê¤òºî¤ë</H3>

<P>»ä¤¿¤Á¤Ï¥æ¡¼¥¶Á´¤Æ¤Î¤¿¤á¤Ë°ì¤Ä¤Î¥Û¡¼¥à¥Ç¥£¥ì¥¯¥È¥ê¤ò»È¤ª¤¦¤È¤·¤Æ¤¤¤Þ¤¹¡£
¤Ç¤Ï¼Â¹Ô¤·¤Æ¤¯¤À¤µ¤¤ -
<P>
<PRE>
# mkdir /home/vpn-users
</PRE>
<H3><CODE>.ssh</CODE> ¥Ç¥£¥ì¥¯¥È¥ê</H3>

<P><CODE>.ssh</CODE> ¥Ç¥£¥ì¥¯¥È¥ê¤ò <CODE>vpn-users</CODE> ¥Û¡¼¥à¥Ç¥£¥ì¥¯¥È¥ê
¤ÎÃæ¤ËºîÀ®¤·¤Þ¤¹¡£
<P>
<PRE>
# mkdir /home/vpn-users/.ssh
</PRE>
<H3>¥æ¡¼¥¶¤òÄɲ乤ë</H3>

<P>¤µ¤ÆÌÌÇò¤¤Éôʬ¤Ë¤ä¤Ã¤Æ¤­¤Þ¤·¤¿¡£¤³¤ì¤«¤é <CODE>/etc/passwd</CODE> ¥Õ¥¡¥¤¥ë¤ò
¼ê¤ÇÊÔ½¸¤¹¤ë¤ï¤±¤Ç¤¹¡£:) Ä̾ï¤Ï¥·¥¹¥Æ¥à¤ËÁàºî¤µ¤»¤ë¥Õ¥¡¥¤¥ë¤Ê¤Î¤Ç¤¹¤¬¡¢
¤³¤¦¤¤¤¦ÊѤï¤Ã¤¿ÀßÄê¤ò¹Ô¤¦¤È¤­¤Ë¤Ï¼«Ê¬¤Ç½ñ¤­´¹¤¨¤ëÊý¤¬´Êñ¤Ç¤¹¡£
ºÇ½é¤Ë <CODE>/etc/passwd</CODE> ¥Õ¥¡¥¤¥ë¤ò³«¤¤¤Æ¤½¤³¤Ë²¿¤¬¤¢¤ë¤«
¸«¤Æ¤ß¤Þ¤·¤ç¤¦¡£¤³¤³¤Ï¼¡¤ÎÎã¤Î¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤Ï¤º¤Ç¤¹ - 
<P>
<PRE>
....
nobody:x:65534:100:nobody:/dev/null:
mwilson:x:1000:100:Matthew Wilson,,,:/home/mwilson:/bin/bash
joe:*:1020:101:Joe Mode (home),,,:/home/vpn-users:/usr/sbin/pppd
bill:*:1020:101:Bill Smith (home),,,:/home/vpn-users:/usr/sbin/pppd
frank:*:1020:101:Frank Jones (home),,,:/home/vpn-users:/usr/sbin/pppd
....
</PRE>
<P>ËؤɤΥ·¥¹¥Æ¥à¤ËºÇ½é¤Î¹Ô¤Î¥æ¡¼¥¶¤¬¸«¤Ä¤«¤ë¤Ç¤·¤ç¤¦¡£
2 ÈÖÌܤΥ桼¥¶¤Ï»ä¤Ç¤¹¡£:) ¤½¤Î¼¡¤Ï²¿¿Í¤«¤ÎºîÀ®¤µ¤ì¤¿ vpn-user ¤Ç¤¹¡£
ºÇ½é¤Î¥Õ¥£¡¼¥ë¥É¤Ï¥æ¡¼¥¶Ì¾¤Ç¡¢2 ÈÖÌܤϥѥ¹¥ï¡¼¥É¤Î¥Õ¥£¡¼¥ë¥É¤Ç¤¹¡£
3 ÈÖÌܤϥ桼¥¶ ID (UID) ¤Ç 4 ÈÖÌܤϥ°¥ë¡¼¥× ID (GID) ¤Ç¤¹¡£
¤Ä¤Å¤¯ 5 ÈÖÌܤΥե£¡¼¥ë¥É¤Ï³Æ¥æ¡¼¥¶¤Î¸Ä¿Í¾ðÊó¤Ç¤¹¡£
6 ÈÖÌܤΥե£¡¼¥ë¥É¤Ï¥æ¡¼¥¶¤Î¥Û¡¼¥à¥Ç¥£¥ì¥¯¥È¥ê¤Ç¡¢ºÇ¸å¤ÏÈà¤é¤Î¥·¥§¥ë
¤Ç¤¹¡£¤´Í÷¤Î¤È¤ª¤ê¡¢³Æ¥Õ¥£¡¼¥ë¥É¤Ï¥³¥í¥ó¤Ç¶èÀÚ¤é¤ì¤Æ¤¤¤Þ¤¹¡£ºÇ¸å¤Î
3 ¹Ô¤ò¸«¤Æ¤¯¤À¤µ¤¤¡£¤½¤ì¤é¤Î´Ö¤Ç¤ÎÍ£°ì¤Î°ã¤¤¤Ï¡¢ºÇ½é¤Î¥Õ¥£¡¼¥ë¥É¤Î
¥æ¡¼¥¶Ì¾¤È¡¢5 ÈÖÌܤΥե£¡¼¥ë¥É¤Î¥æ¡¼¥¶¾ðÊó¤Ç¤¹¡£¤ä¤ê¤¿¤¤¤Î¤Ï¡¢
³Æ¥æ¡¼¥¶¤ËÂФ·¤Æ¤³¤Î¤è¤¦¤Ê¹Ô¤òºîÀ®¤¹¤ë¤³¤È¤Ç¤¹¡£ÀܳÁ´¤Æ¤Ëñ°ì¤Î
¥æ¡¼¥¶¤ò»È¤ï¤Ê¤¤¤Ç¤¯¤À¤µ¤¤¡£¤â¤·¤½¤¦¤¹¤ë¤È¡¢Èà¤é¸Ä¡¹¤ò
¸«Ê¬¤±¤ë¤³¤È¤Ï¤Ç¤­¤Ê¤¯¤Ê¤ê¤Þ¤¹¡£¤½¤³¤Ç¡¢¾å¤Ë¼¨¤·¤¿¤è¤¦¤ÊÆâÍƤˤʤë¤è¤¦¡¢
¤³¤Î¥Õ¥¡¥¤¥ë¤ÎºÇ¸å¤Î¹Ô¤ò¥³¥Ô¡¼¤·¤Æ¤½¤ì¤òÊÔ½¸¤·¤Æ¤¯¤À¤µ¤¤¡£2 ÈÖÌܤÎ
¥Õ¥£¡¼¥ë¥É¤Ë¥¢¥¹¥¿¥ê¥¹¥¯ (*) ¤¬¤¢¤ë¤³¤È¤ò³Îǧ¤·¤Æ¤¯¤À¤µ¤¤¡£3 ÈÖÌܤÎ
¥Õ¥£¡¼¥ë¥É¤Ï¡¢¤½¤Î¥Õ¥¡¥¤¥ë¤Î¾¤Î ID Á´¤Æ¤È°ã¤Ã¤Æ¤¤¤ë¤Ù¤­¤Ç¤¹¡£
»ä¤Ï 1020 ¤ò»È¤¤¤Þ¤·¤¿¡£ÉáÄÌ 1000 ̤Ëþ¤Ï¥·¥¹¥Æ¥à¤ÎÍøÍѤΤ¿¤á¤Ë
ͽÌ󤵤ì¤Æ¤¤¤Þ¤¹¤Î¤Ç¡¢¤½¤ì°Ê¾å¤ò»È¤¦¤Ù¤­¤Ç¤¹¡£
4 ÈÖÌܤΥե£¡¼¥ë¥É¤Ï vpn-user ¤Î¥°¥ë¡¼¥× ID ¤Î¤Ï¤º¤Ç¤¹¡£»ä¤Ï
½ñ¤­Î±¤á¤Æ¤ª¤¯¤è¤¦¸À¤¤¤Þ¤·¤¿¡£¤½¤ì¤¬É¬ÍפʤȤ­¤¬¤ä¤Ã¤Æ¤­¤Þ¤·¤¿¡£
¤Ç¤Ï¥°¥ë¡¼¥× ID ¤ò¤½¤³¤ËÆþ¤ì¤Æ¤¯¤À¤µ¤¤¡£ºÇ¸å¤Ë¡¢¥Û¡¼¥à¥Ç¥£¥ì¥¯¥È¥ê¤ò
<CODE>/home/vpn-users</CODE> ¡¢¥·¥§¥ë¤ò <CODE>/usr/sbin/pppd</CODE>
¤ËÊѹ¹¤·¤Æ¤¯¤À¤µ¤¤¡£¤Ç¤­¤Þ¤·¤¿¡£¤Ç¤Ï¤½¤Î¹Ô¤ò¾¤Î¥æ¡¼¥¶¤òºîÀ®¤¹¤ë¤¿¤á¤Ë
¥³¥Ô¡¼¤·¤Æ¤¯¤À¤µ¤¤¡£1 ÈÖÌÜ¤È 5 ÈÖÌܤΥե£¡¼¥ë¥É¤òÊÔ½¸¤·¤ÆÀßÄꤹ¤ë¤À¤±¤Ç¤¹¡£
<H2><A NAME="ss5.8">5.8 ¥µ¡¼¥Ð - ´ÉÍý¤¹¤ë</A>
</H2>

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<H2><A NAME="ss5.9">5.9 ¥¯¥é¥¤¥¢¥ó¥È - ¥«¡¼¥Í¥ë¤ò¹½ÃÛ¤¹¤ë</A>
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<P>2.0 ¥«¡¼¥Í¥ë¤ËÂФ·¤Æ - 
<UL>
<LI>CONFIG_PPP</LI>
<LI>CONFIG_FIREWALL</LI>
<LI>CONFIG_IP_FORWARD</LI>
<LI>CONFIG_IP_FIREWALL</LI>
<LI>CONFIG_IP_ROUTER</LI>
<LI>CONFIG_IP_MASQUERADE</LI>
<LI>CONFIG_IP_MASQUERADE_ICMP</LI>
</UL>
<P>2.2 ¥«¡¼¥Í¥ë¤ËÂФ·¤Æ - 
<UL>
<LI>CONFIG_PPP</LI>
<LI>CONFIG_FIREWALL</LI>
<LI>CONFIG_IP_ADVANCED_ROUTER</LI>
<LI>CONFIG_IP_FIREWALL</LI>
<LI>CONFIG_IP_ROUTER</LI>
<LI>CONFIG_IP_MASQUERADE</LI>
<LI>CONFIG_IP_MASQUERADE_ICMP</LI>
</UL>
<H2><A NAME="ss5.10">5.10 ¥¯¥é¥¤¥¢¥ó¥È - ¥Í¥Ã¥È¥ï¡¼¥¯¤òÀßÄꤹ¤ë</A>
</H2>

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¤³¤ì¤ò¤ä¤ë¤Ë¤Ï¼¡¤ò <CODE>/etc/rc.d/rc.inet1</CODE> (¤¢¤ë¤¤¤Ï¤½¤ì¤Ë
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<P>2.0 ¥«¡¼¥Í¥ë¤ËÂФ·¤Æ - 
<P>
<PRE>
/sbin/ifconfig eth1 192.168.10.253 broadcast 192.168.10.255 netmask 255.255.255.0
/sbin/route add -net 192.168.10.0 netmask 255.255.255.0 dev eth1
</PRE>
<P>2.2 ¥«¡¼¥Í¥ë¤ËÂФ·¤Æ - 
<P>
<PRE>
/sbin/ifconfig eth1 192.168.10.253 broadcast 192.168.10.255 netmask 255.255.255.0
</PRE>
<H3>¥Õ¥£¥ë¥¿µ¬Â§</H3>

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¼¡¤Ëµó¤²¤ë¹Ô¤ò <CODE>/etc/rc.d/rc.inet1</CODE> 
(¤Þ¤¿¤Ï¤½¤ì¤ËÁêÅö¤¹¤ë) ¥Õ¥¡¥¤¥ë¤ËÄɲ䷤Ƥ¯¤À¤µ¤¤ -
<P>2.0 ¥«¡¼¥Í¥ë¤ËÂФ·¤Æ - 
<P>
<PRE>
/sbin/ipfwadm -F -f
/sbin/ipfwadm -F -p deny
/sbin/ipfwadm -F -a accept -b -S 192.168.10.0/24 -D 192.168.0.0/16
</PRE>
<P>2.2 ¥«¡¼¥Í¥ë¤ËÂФ·¤Æ - 
<P>
<PRE>
/sbin/ipchains -F forward
/sbin/ipchains -P forward DENY
/sbin/ipchains -A forward -j ACCEPT -b -s 192.168.10.0/24 -d 192.168.0.0/16
</PRE>
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<H2><A NAME="ss5.11">5.11 ¥¯¥é¥¤¥¢¥ó¥È - <CODE>pppd</CODE>¤òÀßÄꤹ¤ë</A>
</H2>

<P>¥¯¥é¥¤¥¢¥ó¥È¤Î <CODE>/etc/ppp/options</CODE> ¥Õ¥¡¥¤¥ë¤òÊÔ½¸¤¹¤ëɬÍפÏ
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<P>
<H2><A NAME="ss5.12">5.12 ¥¯¥é¥¤¥¢¥ó¥È - <CODE>ssh</CODE> ¤òÀßÄꤹ¤ë</A>
</H2>

<P>¥¯¥é¥¤¥¢¥ó¥È¤Î root ¤Ç¼¡¤Î¹Ô¤ò¼Â¹Ô¤·¤Æ¤¯¤À¤µ¤¤ - 
<P>
<PRE>
# mkdir /root/.ssh
# ssh-keygen -f /root/.ssh/identity.vpn -P ""
</PRE>
<P>¤³¤ì¤Ï <CODE>.ssh</CODE> ¥Ç¥£¥ì¥¯¥È¥ê¤Ë <CODE>identity.vpn</CODE> ¤È 
<CODE>identity.vpn.pub</CODE> ¤Î 2 ¤Ä¤Î¥Õ¥¡¥¤¥ë¤òºîÀ®¤¹¤ë¤Ç¤·¤ç¤¦¡£
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Î㤨¤Ð¥­¡¼¤Ï¼¡¤Î¤è¤¦¤Ê¤â¤Î¤Ç¤¹ -
<P>
<PRE>
1024 35 1430723736674162619588314275167.......250872101150654839 root@vpn-client.mycompany.com
</PRE>
<P>¼ÂºÝ¤Ë¤Ï¤½¤ì¤è¤ê¤«¤Ê¤êŤ¤¤Ç¤¹¤¬¡¢Á´Éô¤ò¸«¤»¤¿¤È¤·¤Æ¤â¥Ú¡¼¥¸¤Ë¤Ï
¤½¤°¤ï¤Ê¤¤¤Ç¤·¤ç¤¦¡£¥µ¡¼¥Ð¤Î <CODE>/home/vpn-users/.ssh/authorized_keys</CODE>
¥Õ¥¡¥¤¥ë¤Ë¥­¡¼¤ò¥³¥Ô¡¼¤·¤Æ¤¯¤À¤µ¤¤¡£1 ¹Ô¤¢¤¿¤ê 1 ¤Ä¤Î¥­¡¼¤¬¤¢¤ê¡¢
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<H2><A NAME="ss5.13">5.13 ¥¯¥é¥¤¥¢¥ó¥È - Àܳ¤ò³ÎΩ¤¹¤ë</A>
</H2>

<P>¤Ç¤Ï VPN ¥µ¡¼¥Ð¤Ë¼ÂºÝ¤ËÀܳ¤·¤Æ¤ß¤Þ¤·¤ç¤¦¡£¤Þ¤º¡¢Ã±°ì¤ÎÀܳ¤ò¹Ô¤¤¡¢
<CODE>ssh</CODE> ¤Îknown_hosts ¥Õ¥¡¥¤¥ë¤ÎÀßÄê¤ò¤¹¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£
¤³¤ì¤ò¼Â¹Ô¤·¤Æ¤¯¤À¤µ¤¤ - 
<P>
<PRE>
# ssh vpn.mycompany.com
</PRE>
<P>Àܳ¤ò³¤±¤¿¤¤¤«¤É¤¦¤«¼ÁÌ䤵¤ì¤¿¤È¤­¤Ë ''yes'' ¤ÈÅú¤¨¤Æ¤¯¤À¤µ¤¤¡£
¥µ¡¼¥Ð¤Ï ''permission denied'' ¤È¸À¤¦¤«¤âÃΤì¤Þ¤»¤ó¤¬¡¢Âç¾æÉפǤ¹¡£
¥µ¡¼¥Ð¤ËÂФ·¤Æ¡¢Àܳ¥¹¥¯¥ê¥×¥È¤ÎÃæ¤Ç»È¤Ã¤Æ¤¤¤ë¤Î¤ÈƱ¤¸Ì¾Á°¤ò
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¤­¤Ã¤È¡¢ÀßÄê¤òŬ¹ç¤µ¤»¤ë¤¿¤á¤Ë¥ª¥×¥·¥ç¥ó¤ÎËؤɤòÊѹ¹¤¹¤ëɬÍפ¬
¤¢¤ë¤Ç¤·¤ç¤¦¡£
<P>
<PRE>
# /usr/sbin/pty-redir /usr/bin/ssh -t -e none -o 'Batchmode yes' -c blowfish -i /root/.ssh/identity.vpn -l vpn-user vpn.mycompany.com > /tmp/vpn-device

(10 ÉäۤÉÂÔ¤Á¤Þ¤·¤ç¤¦)

# /usr/sbin/pppd `cat /tmp/vpn-device` 192.168.10.254:192.168.40.254
</PRE>
<P>pppd ¤Î¹Ô¤Ç»ØÄꤵ¤ì¤Æ¤¤¤ë IP ¥¢¥É¥ì¥¹¤ËÃí°Õ¤·¤Æ¤¯¤À¤µ¤¤¡£ºÇ½é¤Ï¥È¥ó¥Í¥ë¤Î
¥¯¥é¥¤¥¢¥ó¥È¦¤Îü¤Î¥¢¥É¥ì¥¹¤Ç¤¹¡£2 ÈÖÌܤϥȥó¥Í¥ë¤Î¥µ¡¼¥Ð¦¤Îü¤Î¥¢¥É¥ì¥¹¤Ç
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¤·¤Æ¤¤¤ë¤è¤¦¤Ê¤é¡¢Â³¤±¤Æ¤¯¤À¤µ¤¤¡£¤â¤·¤½¤¦¤Ç¤Ê¤¤¤Ê¤é¡¢»ØÄꤷ¤¿
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<A HREF="VPN-HOWTO-6.html#pitfalls">Íî¤È¤··ê ¥»¥¯¥·¥ç¥ó</A>¤ò¥Á¥§¥Ã¥¯¤·¤Æ¤ß¤Æ¤¯¤À¤µ¤¤¡£
<H2><A NAME="ss5.14">5.14 ¥¯¥é¥¤¥¢¥ó¥È - ·ÐÏ©¤òÀßÄꤹ¤ë</A>
</H2>

<P>¤Ç¤Ï¡¢·ÐÏ©¤ò¡¢¥È¥ó¥Í¥ë¤òÄ̤·¤Æ¥È¥é¥Õ¥£¥Ã¥¯¤òÁ÷¤ë¤è¤¦¤ËÀßÄꤷ¤Æ¤¯¤À¤µ¤¤¡£
¤³¤ì¤ò¼Â¹Ô¤¹¤ë¤À¤±¤Ç¤¹ -
<P>
<PRE>
# /sbin/route add -net 192.168.0.0 gw vpn-internal.mycompany.com netmask 255.255.0.0
</PRE>
<P>¤³¤ì¤Ç¥È¥ó¥Í¥ë¤Î¾ü¤Ë¤¢¤ë¥Þ¥·¥ó¤ÈÄÌ¿®¤Ç¤­¤ë¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤Ï¤º¤Ç¤¹¡£
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¤É¤³¤ËÌäÂ꤬¤¢¤ë¤Î¤«¤òÆͤ­»ß¤á¤ë¤¿¤á¤Ë<CODE>ping</CODE> ¤ä <CODE>traceroute</CODE>
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