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In-Reply-To: Your message of "Tue, 10 Sep 1996 18:51:54 +0900"
References: <199609100951.SAA25328@sphinx.sysrap.cs.fujitsu.co.jp>
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Date: Tue, 10 Sep 1996 20:25:23 +0900
From: Mitsuhide Satou <mit-sato@ari.bekkoame.or.jp>
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X-Sequence: FreeBSD-users-jp 4454
Subject: [FreeBSD-users-jp 4454] Re: ipfw(8) bug ?
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$B:4F#!w$Y$C$3$"$a$G$9!#(B

From: Masahiro SEKIGUCHI <seki@sysrap.cs.fujitsu.co.jp>
Subject: [FreeBSD-users-jp 4450] ipfw(8) bug ?
Date: Tue, 10 Sep 1996 18:51:54 +0900

>  > 	struct hostent *he = gethostbyname(host);
>  > 	if (!he)
>  > 		return(-1);
> 
>  > $B$3$l$8$c!"$I$&9M$($F$b(B IP $B%"%I%l%9$G$N;XDj$,=PMh$=$&$K$"$j$^$;$s!#(B
> 
> 4.3 $B$N$3$m$N(B gethostbyname $B$O!"Cf$G(B inet_addr() $B$r0z$$$F$_$F!"(BIP $B%"%I(B
> $B%l%9;XDj$rM}2r$9$k$h$&$K$J$C$F$$$?$h$&$J5$$,$7$^$9!#(BFreeBSD $B$b!"(B2.0.5 
> $B$G$O$=$&$J$C$F$?$h$&$J5$$,$7$^$9!#(B
> 
> 2.1.5 $B$G$OJQ$o$C$?$H$$$&$3$H$+$J(B?
> 
> # $B%=!<%98+$l$P$$$$$s$G$9$,!#(B:-)

$B$$$^!"8+$^$7$?!#(B
$B$G!"$h$/$o$+$i$J$$$N$G$9$,!"(Binet_addr $B$O3N$+$K8F$s$G$$$k$N$G$9$,!"(B
$B$I$&$b!"%[%9%HL>$H!"(BIP$B%"%I%l%9$I$A$i$,Mh$F$b4|BT$7$?7k2L$rJV$9$h$&$K$O(B
$B8+$($J$+$C$?$G$9!#(B
$B!t(B $B$h$/$o$+$C$F$$$J$$!#(B

> 
>  > $B;d$N4*0c$$$G$9$+!)(B
> 
> $BA4A3$o$+$C$F$^$;$s$,!"(B
> 
>  > + lookup_ip (host, ipaddr)
> 	... abridged ...
>  > + 	if (*p=='/' || *p==':' || *p==' ' || *p=='\t') {
>  > + 	    *p=0;
> 
> $B$H$$$&$3$H$O!"(B
> 
>  > 	ipfw add deny from 172.25.0.0/16 to any ...
> 
> $B$H$$$&;XDj$KBP$7$F!"(Bhsot $B$K$O(B
> 
> 	"172.25.0.0/16"
> 
> $B$H$$$&J8;zNs$,Mh$F$k$o$1$G$9$+(B? $B$=$l$,LdBj$J$s$8$c$J$$$+$J$!!#(B"/16" $B$,(B
> $B$J$1$l$P(B gethostbyname() $B$G%$%1$k$N$+$b!#(B

$B$"$O$O$O!#(B
$B$3$l$O!"$b$7(B '/16' $B$H$+(B ':255.255.0.0' $B$H$+$D$$$FMh$?$i$d$@$J$!!"(B
$B$H;W$C$F$D$1$?$@$1$G$9!#<B:]$OEO$C$FMh$J$$$h$&$G$9!#(B
$BL5BL$J=hM}$r=q$$$F$7$^$$$^$7$?!#(B
$B<B:]$K!"(B
	ipfw add deny from 172.25.0.0 to any ...
$B$J$I$H$7$F$b!"(B"ip number" $B$&$s$?$i(B.. $B$H8@$o$l$F$7$^$$$^$9!#(B

$B$D$$$G$K!"(Binet_aton $B$J$s$F$$$&$=$N$b$N$:$P$j$N4X?t$r8+$D$1$F$7$^$$$^$7$?!#(B
$B%M%C%H%o!<%/$N%3!<%I$r=q$$$F$k?M$K$O>o<1$J$s$G$7$g$&$1$I(B...
$BA4$/$b$C$FL5BL$J;v$r$7$F$$$k$J$!!#(B

$B$"$H!"(B2.1.0R $B$N(B ipfw $B$N%=!<%9$r8+$^$7$?$,!"A4$/JL$b$N$G$9$M!#(B
$B$3$A$i$O!"(Bgethostbyaddr $B$H$+$d$C$F$$$k$h$&$G$9!#(B

--
$B:4F#(B $B;0=((B (E-Mail: mit-sato@aries.bekkoame.or.jp)
