6.2 PPP ¥Õ¥£¥ë¥¿¤È¤Îµº¤ì

PPP ¥×¥í¥°¥é¥à¤Ë¤Ï, PPP ·Ðͳ¤Î¥È¥é¥Õ¥£¥Ã¥¯¤ËÂФ·¤Æ, ÁªÂòŪ¤Ë¥Õ¥£¥ë¥¿¤ò¤«¤±¤ëǽÎϤ¬¤¢¤ê¤Þ¤¹. ¤³¤ì¤¬Àµ¼°¤Î¥Õ¥¡¥¤¥¢¥¦¥©¡¼¥ë¤Û¤É¥»¥­¥å¥¢¡¼¤À¤È¤Ï¤È¤Æ¤â¸À¤¨¤Þ¤»¤ó¤¬, ¥ê¥ó¥¯¤Î»ÈÍѤˤĤ¤¤Æ¤¢¤ë¼ï¤Î¥¢¥¯¥»¥¹À©¸æ¤òÄ󶡤¹¤ë¤³¤È¤Ï¤Ç¤­¤ë¤Î¤Ç¤¹.

(FreeBSD ¥·¥¹¥Æ¥à¤ò¤è¤ê¥»¥­¥å¥¢¡¼¤Ë¤¹¤ëÊýË¡¤òÃΤꤿ¤¤Êý¤Ï 'man ipfw' ¤·¤Æ¤¯¤À¤µ¤¤)

PPP ²¼¤Ç»ÈÍѤǤ­¤ëÍÍ¡¹¤Ê¥Õ¥£¥ë¥¿¤È¤½¤ÎÀ©¸æË¡¤Ë¤Ä¤¤¤Æ¤Î´°Á´¤ÊÀâÌÀ¤Ï PPP ¤Î man ¤Ë¤¢¤ê¤Þ¤¹.

PPP ¥×¥í¥°¥é¥à¤ËŬÍѤǤ­¤ëÀ©¸æË¡¤Ë¤Ï»Í¤Ä¤Î¥¯¥é¥¹¤¬¤¢¤ê¤Þ¤¹.

°Ê²¼¤Ï¼ÂºÝ¤Ë²ÔƯ¤·¤Æ¤¤¤ë¥ª¥Ú¥ì¡¼¥Æ¥£¥ó¥°¥·¥¹¥Æ¥à¤«¤é°ìÉôÇÒ¼Ú¤·¤ÆÍ褿¤â¤Î¤Ç¤¹. ¤³¤Î¥·¥¹¥Æ¥à¤Ï¡ÖÄ̾ï¤Î¡×¥¤¥ó¥¿¡¼¥Í¥Ã¥È¥ª¥Ú¥ì¡¼¥·¥ç¥ó¤Ë½½Ê¬¤ÊÁÇÃϤòÄ󶡤·¤Ä¤Ä, PPP ¤¬¤¹¤Ù¤Æ¤Î¥Ç¡¼¥¿¤ò¥À¥¤¥¢¥ë¥¢¥Ã¥×Àܳ±Û¤·¤Ë¤ä¤ê¼è¤ê¤¹¤ë¤³¤È¤Î¤Ê¤¤¤è¤¦¤Ë¤·¤Æ¤¤¤Þ¤¹. ³Æ¥ë¡¼¥ë¥»¥Ã¥È¤Î¥í¥¸¥Ã¥¯¤ò²òÀ⤹¤ë´Êñ¤Ê¥³¥á¥ó¥È¤ò¤Ä¤±¤Æ¤¢¤ê¤Þ¤¹.

#
# KeepAlive ¥Õ¥£¥ë¥¿
# ICMP,DNS ¤È RIP ¥Ñ¥±¥Ã¥È¤¬Î®¤ì¤Æ¤â¡ÖÄÌ¿®Ãæ¡×¤È¤Ï¤ß¤Ê¤µ¤Ê¤¤
#
 set filter alive 0 deny icmp
 set filter alive 1 deny udp src eq 53
 set filter alive 2 deny udp dst eq 53
 set filter alive 3 deny udp src eq 520
 set filter alive 4 deny udp dst eq 520
 set filter alive 5 permit 0/0 0/0
#
# ¥À¥¤¥¢¥ë¥Õ¥£¥ë¥¿
#  Ãí°Õ:  ¤³¤ÎÀßÄê¤Ç¤Ï ICMP ¤â¥À¥¤¥¢¥ë¥¢¥¦¥È¤Î¥È¥ê¥¬¤Ë¤Ê¤ë
#
 set filter dial 0 permit 0/0 0/0
#
# ident ¥Ñ¥±¥Ã¥È¤ÎÄ̲á¤òµö²Ä¤¹¤ë
#
 set filter in 0 permit tcp dst eq 113
 set filter out 0 permit tcp src eq 113
#
# ¥¤¥ó¥¿¡¼¥Í¥Ã¥È¤Ø¤Î telnet Àܳ¤òµö²Ä¤¹¤ë
#
 set filter in 1 permit tcp src eq 23 estab
 set filter out 1 permit tcp dst eq 23
#
# ¥¤¥ó¥¿¡¼¥Í¥Ã¥È¤Ø¤Î ftp ¥¢¥¯¥»¥¹¤òµö²Ä¤¹¤ë
#
 set filter in 2 permit tcp src eq 21 estab
 set filter out 2 permit tcp dst eq 21
 set filter in 3 permit tcp src eq 20 dst gt 1023
 set filter out 3 permit tcp dst eq 20
#
# DNS ¤Ø¤ÎÌ䤤¹ç¤ï¤»¤òµö²Ä¤¹¤ë
#
 set filter in 4 permit udp src eq 53
 set filter out 4 permit udp dst eq 53
#
# DNS ¥¾¡¼¥óžÁ÷¤òµö²Ä¤¹¤ë
#
 set filter in 5 permit tcp src eq 53
 set filter out 5 permit tcp dst eq 53
#
# ¥í¡¼¥«¥ë¥Í¥Ã¥È¥ï¡¼¥¯¤«¤é / ¤Ø¤Î¥¢¥¯¥»¥¹¤òµö²Ä¤¹¤ë
#
 set filter in 6 permit 0/0 192.168.1.0/24
 set filter out 6 permit 192.168.1.0/24 0/0
 set ifilter 6 permit 0/0 192.168.1.0/24
 set ofilter 6 permit 192.168.1.0/24 0/0
#
# ping ¤È traceroute ¤Ø¤ÎÊÖÅú¤òµö²Ä¤¹¤ë
#
 set filter in 7 permit icmp
 set filter out 7 permit icmp
 set filter in 8 permit udp dst gt 33433
 set filter out 9 permit udp dst gt 33433
#
# cvsup ¤òµö²Ä¤¹¤ë
#
 set filter in 9 permit tcp src eq 5998
 set filter out 9 permit tcp dst eq 5998
 set filter in 10 permit tcp src eq 5999
 set filter out 10 permit tcp dst eq 5999
#
# »þ´Ö¤ÎƱ´ü¤Î¤¿¤á¤Ë NTP ¤òµö²Ä¤¹¤ë
#
 set filter in 11 permit tcp src eq 123 dst eq 123
 set filter out 11 permit tcp src eq 123 dst eq 123
 set filter in 12 permit udp src eq 123 dst eq 123
 set filter out 12 permit udp src eq 123 dst eq 123
#
# SMTP ¤â¤¤¤¤¤«¤â!
#
 set filter in 13 permit tcp src eq 25
 set filter out 13 permit tcp dst eq 25
#
#
# `whois` ¤ò¿ÍѤ¹¤ë¤Î¤Ç, ¤³¤ì¤âÄ̤¹
#
 set filter in 14 permit tcp src eq 43
 set filter out 14 permit tcp dst eq 43
 set filter in 15 permit udp src eq 43
 set filter out 15 permit udp dst eq 43
#
# ¾åµ­¤Î¤É¤Î¥ë¡¼¥ë¤Ë¤â¥Þ¥Ã¥Á¤·¤Ê¤¤¾ì¹ç, ¥Ñ¥±¥Ã¥È¤Ï¥Ö¥í¥Ã¥¯¤µ¤ì¤ë.
#-------

¥Õ¥£¥ë¥¿¥¯¥é¥¹°ì¤Ä¤Ë¤Ä¤­, 20 ¸Ä¤Þ¤Ç¤Î¥Õ¥£¥ë¥¿¥ê¥ó¥°¥ë¡¼¥ë¤òŬÍѤ¹¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹. ³Æ¥¯¥é¥¹¤Î¥ë¡¼¥ë¤Ï 0 ¤«¤é 20 ¤Þ¤Ç¤ÎϢ³¤·¤¿¿ô»ú¤Ç¤¢¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¤¬, ¤¢¤ë¥Õ¥£¥ë¥¿¥¯¥é¥¹¤ËÂФ¹¤ë¥ë¡¼¥ë¤Ï, ¥ë¡¼¥ë¥»¥Ã¥È '0' ¤¬ÄêµÁ¤µ¤ì¤ë¤Þ¤Ç¤ÏÍ­¸ú¤Ë¤Ê¤ê¤Þ¤»¤ó!

PPP ¤ÎÀßÄê¤Ç¥Õ¥£¥ë¥¿¥ê¥ó¥°¥ë¡¼¥ë¤ò»ÈÍѤ·¤Ê¤¤¾ì¹ç, ISP ¤Ø¤ÎÀÜÂ³Ãæ¤Ï¤¹¤Ù¤Æ¤Î¥È¥é¥Õ¥£¥Ã¥¯¤¬¥·¥¹¥Æ¥à¤Ë½ÐÆþ¤ê¤¹¤ë¤³¤È¤Ë¤Ê¤ê¤Þ¤¹.

¥Õ¥£¥ë¥¿¥ê¥ó¥°¥ë¡¼¥ë¤ò»ÈÍѤ·¤¿¤¤¤Ê¤é, ¾åµ­¤ÎÀßÄê¤ò /etc/ppp/ppp.conf ¥Õ¥¡¥¤¥ë¤Î "default:", "demand:", ¤Þ¤¿¤Ï "interactive:" ¥»¥¯¥·¥ç¥ó¤Î¤É¤ì¤« (¤¢¤ë¤¤¤Ï¤¹¤Ù¤Æ - Áª¤Ö¤Î¤Ï¤¢¤Ê¤¿¤Ç¤¹) ¤ËÄɲ䷤Ƥ¯¤À¤µ¤¤.

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