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LCP ¥Í¥´¥·¥¨¡¼¥·¥ç¥ó¤Î°ìÉô¤È¤·¤Æ¡¢ ¥ê¥ó¥¯¤Îξ¥µ¥¤¥É¤Ç magic number ¤òÄê¤á¤Æ¡¢ ¡ÖÈ¿¼Í¡×¤¬µ¯¤¤Æ¤¤¤Ê¤¤¤«¤É¤¦¤«³Î¤«¤á¤ëºî¶È¤¬¤¢¤ê¤Þ¤¹¡£ µ¬Ìó¤Ç¤Ï¡¢ÀܳÁê¼ê¤¬¤³¤Á¤é¤ÈƱ¤¸ magic number ¤òÄ󼨤·¤Æ¤¤¿¤é¡¢ NAK ¤òÁ÷¤Ã¤Æ¿·¤·¤¤ magic number ¤òÁªÂò¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¤ÈÄê¤á¤Æ¤¤¤Þ¤¹¡£ ¤³¤Îºî¶È¤Î´Ö¡¢¥µ¡¼¥Ð¤Î¥·¥ê¥¢¥ë¥Ý¡¼¥È¤Î ECHO ¤¬¤º¤Ã¤È͸ú¤Ë¤Ê¤Ã¤¿¤Þ¤Þ¤Ê¤Î¤Ç¡¢ ¥¯¥é¥¤¥¢¥ó¥È¦¤Î ppp ¤Ï LCP ¥Ñ¥±¥Ã¥È¤òÁ÷¤ê¡¢ ¥Ñ¥±¥Ã¥È¤¬È¿¼Í¤·¤ÆÁ´¤¯Æ±¤¸ magic number ¤¬Á÷¤é¤ì¤Æ¤¯¤ë¤Î¤ò¸«¤Ä¤±¡¢ ¤½¤ì¤ËÂФ·¤Æ NAK ¤òÁ÷¤ë¤Î¤Ç¤¹¡£°ìÊý NAK ¼«ÂΤâ (¤³¤ì¤Ï ppp ¤¬ magic number ¤òÊѹ¹¤·¤Ê¤±¤ì¤Ð¤¤¤±¤Ê¤¤¤³¤È¤ò°ÕÌ£¤·¤Æ¤¤¤Þ¤¹) È¿¼Í¤·¤Æ¤¯¤ë¤Î¤Ç¡¢ ·ë²Ì¤È¤·¤Æ magic number ¤¬¿ô¤¨¤¤ì¤Ê¤¤¤Û¤ÉÊѹ¹¤µ¤ì¡¢ ¤½¤Î¤¹¤Ù¤Æ¤¬¥µ¡¼¥Ð¤Î tty ¥Ð¥Ã¥Õ¥¡¤ÎÃæ¤ËÀѤ߽Ťʤ뤳¤È¤Ë¤Ê¤ë¤Î¤Ç¤¹¡£ ¥µ¡¼¥Ð¤Ç¥¹¥¿¡¼¥È¤·¤¿ ppp ¤Ï¡¢¤¹¤°¤Ë magic number ¤Ç¤¢¤Õ¤ì¤«¤¨¤Ã¤Æ¤·¤Þ¤¤¡¢ LCP ¤Î¥Í¥´¥·¥¨¡¼¥·¥ç¥ó¤ò½½Ê¬¤Ë¹Ô¤Ã¤¿¤â¤Î¤ÈȽÃǤ·¤Æ¡¢ ¤µ¤Ã¤µ¤ÈÀܳ¤òÀڤäƤ·¤Þ¤¤¤Þ¤¹¡£ °ìÊý¡¢ ¥¯¥é¥¤¥¢¥ó¥È¦¤ÏÈ¿¼Í¤¬µ¢¤Ã¤Æ¤³¤Ê¤¯¤Ê¤Ã¤¿¤Î¤ÇËþ¤·¤Þ¤¹¤¬¡¢ ¤½¤ì¤â¥µ¡¼¥Ð¤¬Àܳ¤òÀڤ俤³¤È¤òÃΤë¤Þ¤Ç¤Ç¤¹¡£
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set openmode passive
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set openmode active 3
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set openmode active N
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disable pred1
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enable lqr
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set dfilter 1 deny udp src eq 53 set dfilter 2 deny udp dst eq 53 set dfilter 3 permit 0/0 0/0
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define(`confDELIVERY_MODE', `d')dnl
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disable pred1
FreeBSD 2.2.2 °ÊÁ°¤Î¥Ð¡¼¥¸¥ç¥ó¤Î tun ¥É¥é¥¤¥Ð¤Ë¤Ï¡¢tun ¥¤¥ó¥¿¥Õ¥§¡¼¥¹¤Î MTU ¤Î¥µ¥¤¥º¤è¤êÂ礤ʥѥ±¥Ã¥È¤ò¼õ¤±¼è¤ë¤³¤È¤¬¤Ç¤¤Ê¤¤¤È¤¤¤¦¥Ð¥°¤¬¤¢¤ê¤Þ¤·¤¿¡£ MTU ¤Î¥µ¥¤¥º¤è¤êÂ礤ʥѥ±¥Ã¥È¤ò¼õ¤±ÉÕ¤±¤ë¤È IO ¥¨¥é¡¼¤¬µ¯¤³¤ê¡¢ syslogd ·Ðͳ¤ÇµÏ¿¤µ¤ì¤ë¤Î¤Ç¤¹¡£
ppp ¤Î»ÅÍͤǤϡ¢ LCP ¤Î¥Í¥´¥·¥¨¡¼¥·¥ç¥ó¤ò¹Ô¤¦¾ì¹ç¤ò´Þ¤à¤É¤Î¤è¤¦¤Ê¾ì¹ç¤Ç¤âºÇÄã 1500 ¥ª¥¯¥Æ¥Ã¥È¤Î Maximum Receive Unit (MRU) ¤ò¼õ¤±Æþ¤ì¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£ ¤Ç¤¹¤«¤é¡¢MTU ¤ò 1500 °Ê²¼¤ËÀßÄꤷ¤¿¾ì¹ç¤Ç¤â¡¢ISP ¤Ï¤½¤ì¤Ë´Ø·¸¤Ê¤¯ 1500 ¤ÎÂ礤µ¤Î¥Ñ¥±¥Ã¥È¤òÁ÷¤Ã¤Æ¤¯¤ë¤Ç¤·¤ç¤¦¡£ ¤½¤·¤Æ¤³¤Î¥¤¥±¤Æ¤Ê¤¤µ¡Ç½¤Ë¤Ö¤Á¤¢¤¿¤Ã¤Æ¡¢ ¥ê¥ó¥¯¤¬¸Ç¤Þ¤ë¤Î¤òÌܤˤ¹¤ë¤³¤È¤Ë¤Ê¤ë¤Î¤Ç¤¹¡£
FreeBSD 2.2.2 °ÊÁ°¤Î¥Ð¡¼¥¸¥ç¥ó¤Ç¤Ï¡¢MTU ¤ò·è¤·¤Æ 1500 ¤è¤ê¾®¤µ¤¯¤·¤Ê¤¤¤³¤È¤Ç¡¢ ¤³¤ÎÌäÂê¤ò²óÈò¤¹¤ë¤³¤È¤¬¤Ç¤¤Þ¤¹¡£
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set log +connect
¤³¤ì¤Ï ppp(8) ¤ËºÇ¸å¤Ë¤¯¤ë¤³¤È¤¬Í׵ᤵ¤ì¤Æ¤¤¤ë expect ¤È¤¤¤¦Ê¸»úÎ󤬤¯¤ë¤Þ¤Ç¤Î¤¹¤Ù¤Æ¤Î¤â¤Î¤ò¥í¥°¤ËµÏ¿¤µ¤»¤Þ¤¹¡£
Àܳ®ÅÙ¤Ï¥í¥°¤Ë¤È¤ê¤¿¤¤¤±¤ì¤É¡¢PAP ¤ä CHAP ¤ò»È¤Ã¤Æ¤¤¤ë (¤½¤Î·ë²Ì¡¢¥À¥¤¥ä¥ë¥¹¥¯¥ê¥×¥ÈÃæ¤Î CONNECT °Ê¹ß¤ËÁ´¤¯¡Ö¤ä¤ê¤È¤ê¡×¤ò¹Ô¤ï¤Ê¤¤ - set login ¥¹¥¯¥ê¥×¥È¤Ë¤Ï²¿¤â½ñ¤«¤Ê¤¤) ¤Î¤Ç¤¢¤ì¤Ð¡¢ ppp ¤Ë expect ¤ò´Þ¤ó¤À CONNECT ¹Ô¤¹¤Ù¤Æ¤¬¤¯¤ë¤Þ¤ÇÂÔ¤¿¤»¤ë¤è¤¦¤Ë¤·¤Ê¤¤¤È¤¤¤±¤Þ¤»¤ó¡¢ °Ê²¼¤Î¤è¤¦¤Ë¤Ê¤ê¤Þ¤¹¡£
set dial "ABORT BUSY ABORT NO\\sCARRIER TIMEOUT 4 \"\" ATZ OK-ATZ-OK ATDT\\T TIMEOUT 60 CONNECT \\c \\n"
¤³¤³¤Ç¡¢CONNECT ¤ò¼õ¿®¤·¤Æ¤«¤é¡¢ ²¿¤âÁ÷¤é¤º¡¢Éüµ¢²þ¹Ô (linefeed) ¤òÂԤäƤ¤¤Þ¤¹¡¢ ppp ¤Ë CONNECT ¤Î±þÅú¤¹¤Ù¤Æ¤òÆÉ¤ß¹þ¤Þ¤»¤Æ¤¤¤ë¤ï¤±¤Ç¤¹¡£
PPP ¤ÏÀßÄê¥Õ¥¡¥¤¥ë¤òÆÉ¤ß¹þ¤à¤È¤¤Ë¡¢ set phone "123 456 789" ¤Î¤è¤¦¤Êʸ»úÎó¤òÀµ¤·¤¯²ò¼á¤·¡¢ Èֹ椬¼ÂºÝ¤Ë1 ¤Ä¤Î°ú¿ô¤Ç¤¢¤ë¤ÈÍý²ò¤·¤Þ¤¹¡£ " ¤È¤¤¤¦Ê¸»ú¤ò»ØÄꤹ¤ë¤Ë¤Ï¡¢¥Ð¥Ã¥¯¥¹¥é¥Ã¥·¥å (backslash; \) ¤Ç¥¨¥¹¥±¡¼¥×¤·¤Ê¤±¤ì¤Ð¤Ê¤ê¤Þ¤»¤ó¡£
chat ¤Î³Æ°ú¿ô¤¬²ò¼á¤µ¤ì¤ë¤È¤¤Ë¤Ï¡¢ \P ¤ä \T ¤Î¤è¤¦¤ÊÆÃÊ̤ʥ¨¥¹¥±¡¼¥×¥·¡¼¥±¥ó¥¹ (¥Þ¥Ë¥å¥¢¥ë¥Ú¡¼¥¸»²¾È¤Î¤³¤È) ¤ò¸«ÉÕ¤±¤ë¤¿¤á¤Ë¡¢ ¤â¤¦ 1 ²ó¡¢»ú¶ç²òÀϤò¹Ô¤¤¤Þ¤¹¡£ ¤³¤Î¤è¤¦¤Ë»ú¶ç²òÀÏ¤Ï 2 ²ó·«¤êÊÖ¤µ¤ì¤Þ¤¹¤Î¤Ç¡¢ Àµ¤·¤¤²ó¿ô¤À¤±¥¨¥¹¥±¡¼¥×½èÍý¤ò¹Ô¤ï¤Ê¤¤¤È¤¤¤±¤Þ¤»¤ó¡£
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set dial "\"\" ATZ OK-ATZ-OK AT\\\\X OK"
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ATZ OK AT\X OK
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set phone 1234567 set dial "\"\" ATZ OK ATDT\\T"
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ATZ OK ATDT1234567
ppp (¤ä¾¤Î¥×¥í¥°¥é¥à) ¤Ï·è¤·¤Æ core ¤òÅǤ¤¤Æ¤Ï¤¤¤±¤Þ¤»¤ó¡£ ppp ¤Ï¼Â¸ú uid ¤¬ 0 ¤Çư¤¤¤Æ¤¤¤Þ¤¹¤Î¤Ç¡¢ ¥ª¥Ú¥ì¡¼¥Æ¥£¥ó¥°¥·¥¹¥Æ¥à¤Ï ppp ¤ò½ªÎ»¤µ¤»¤ëÁ°¤Ë¥Ç¥£¥¹¥¯¤Ë core ¥¤¥á¡¼¥¸¤ò½ñ¤¹þ¤ß¤Þ¤»¤ó¡£ ¤·¤«¤· ppp ¤Ï¼ÂºÝ¤Ë¤Ï¥»¥°¥á¥ó¥Æ¡¼¥·¥ç¥ó°ãÈ¿¤ä¡¢ ¾¤Î core ¤òÅǤ¯¸¶°ø¤È¤Ê¤ë¤è¤¦¤Ê¥·¥°¥Ê¥ë¤Ë¤è¤Ã¤Æ½ªÎ»¤·¤Æ¤ª¤ê¡¢ ¤µ¤é¤ËºÇ¿·¤Î¥Ð¡¼¥¸¥ç¥ó (¤³¤Î¥»¥¯¥·¥ç¥ó¤Î»Ï¤á¤ò¸«¤Æ¤¯¤À¤µ¤¤) ¤ò»ÈÍѤ·¤Æ¤¤¤ë¤Ê¤é¤Ð¡¢¼¡¤Î¤è¤¦¤Ë¤·¤Æ¤¯¤À¤µ¤¤¡£
% tar xfz ppp-*.src.tar.gz % cd ppp*/ppp % echo STRIP= >>Makefile % echo CFLAGS+=-g >>Makefile % make clean all % su # make install # chmod 555 /usr/sbin/ppp
¤³¤ì¤Ç¥Ç¥Ð¥Ã¥°²Äǽ¤Ê¥Ð¡¼¥¸¥ç¥ó¤Î ppp ¤¬¥¤¥ó¥¹¥È¡¼¥ë¤µ¤ì¤Þ¤¹¡£ root ¤Ç ppp ¤ò¼Â¹Ô¤·¡¢ ¤¹¤Ù¤Æ¤ÎÆÃ¸¢¤¬Ìµ¸ú¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤è¤¦¤Ë¤¹¤ëɬÍפ¬¤¢¤ë¤Ç¤·¤ç¤¦¡£ ppp ¤ò¼Â¹Ô¤¹¤ë»þ¤Ë¤Ï¡¢ ¥«¥ì¥ó¥È¥Ç¥£¥ì¥¯¥È¥ê¤¬ make ¤·¤¿¥Ç¥£¥ì¥¯¥È¥ê¤Ç¤¢¤ë¤è¤¦¤Ë¤·¤Æ¤¯¤À¤µ¤¤¡£
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% su # gdb /usr/sbin/ppp ppp.core (gdb) bt ..... (gdb) f 0 .... (gdb) i args .... (gdb) l .....
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