From owner-FreeBSD-net-jp@jp.freebsd.org  Tue Aug 19 13:08:14 1997
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In-Reply-To: Your message of "18 Aug 1997 17:12:48 +0900"
	<19970818081018.4707.qmail@reseau.toyonaka.osaka.jp>
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Date: Tue, 19 Aug 1997 13:08:05 +0900
From: Makoto MATSUSHITA (=?ISO-2022-JP?B?GyRCJF4kRCQ3JD8kXiQzJEgbKEI=?=) <matusita@ics.es.osaka-u.ac.jp>
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Subject: [FreeBSD-net-jp 88] Re: DoS attack and the solution: tcpserver or a modified inetd?
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kenji> $B$^$"(Btcpserver$B$@$H(Bbind()$B$9$k%"%I%l%9$r@)8B$G$-$?$j!"Aj<j$N(BIP$B%"%I%l%9$d(B
kenji> ident$B>pJs$J$I$r4D6-JQ?t$KMn$H$7$F$/$l$?$j!"(BIP options$B$rDY$7$?$j!"(B
kenji> TCP_NODELAY$B$r;H$C$?$j;H$o$J$+$C$?$j$G$-$k$H$$$&$N$O$"$j$^$9!#(B

$B7k6IA4It$4$j$4$j:Y$+$/$d$m$&$H;W$C$?$i(B($B4{B8$N(B FreeBSD $BImB0(B) inetd $B$G$O(B
$B?I$$!$$H$$$($P$^$"$=$&$J$N$@$H$O;W$o$l$^$9!%$H$O$$$(4{B8$N$d$D$G$b(B

$B!&(B-a option $B$r;H$($P(B bind $B$9$k(B address $B$O=q$1$k$i$7$$$N$G!$(Bbind $B$7$?$$(B 
  address $B$N?t$@$1(B inetd $B$rF0$+$;$PNI$$(B (Well, it's simple:)
$B!&(Bident $B$rC!$$$F$b5$5Y$a$K$7$+$J$i$J$$$H;W$($P!$$G$-$J$+$C$?$+$i$H$$$C(B
  $B$FHa$7$^$J$/$F$b$^$"$$$$(B(Windows95 $B$N7W;;5!$r(B ident $B$GC!$$$FLa$C$F$-(B
  $B$?J8;zNs$r8+$F!$2?$N0UL#$,$"$k(B?:)

$B$H$+$$$&0L$O$J$s$H$+$J$j$=$&$G$9$h$M!%(B

$B$G!$(B3 $BIC;W$C$?$s$G$9$,!$(B

	service-name[/bind-address]
	socket-type[/socket-option]
	protocol[/protocol-opt]
	wait|nowait[/max-child]
	effective-username
	server-prog
	server-prog-args

$B$H$+$$$&=q<0$K$J$k$H!$$^$"$=$3$=$3JXMx$@$C$?$j$9$k$N$@$m$&$+!$$H;W$C$?(B
$B$s$G$9$,!$(Btcpmux/phonebook/10.0.0.1 $B$H$+=q$$$?$i$o$1$o$+$G$9$M(B ^_^;

# $B!E!E$J$s$+$d$P$$M=46$,$9$k$1$IK:$l$h$&!%(B

kenji> DoS$B967b$K$O(Binetd$B$G$b;R6!$N?t$N@)8B$r$7$F$d$l$P$=$l$J$j$NBP:v$O(B
kenji> $B$G$-$k!"$H$$$&$3$H$G$9$M!#(B

process table $B$rNO$$$C$Q$$$G$+$/$7$FBP=h!$$H$+(B :-p

-- -
Makoto `MAR_kun' MATSUSHITA
