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To: FreeBSD-net-jp@jp.freebsd.org
From: Hitoshi Kamata <hitoshi.kamata@fujixerox.co.jp>
References: <29923.917925089@nwk.cl.nec.co.jp>
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Subject: [FreeBSD-net-jp 1312] Re: =?ISO-2022-JP?B?GyRCSVRANRsoQg==?= ARP
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<29923.917925089@nwk.cl.nec.co.jp> $B$N!"(B
   "[FreeBSD-net-jp 1311] Re: $BIT@5(B ARP$B$N%"%/%;%9@)8BJ}K!$O$"$j$^$9$+!)(B " $B$K$*$$$F!"(B
   "hino@ccm.cl.nec.co.jp"$B$5$s$O=q$-$^$7$?!'(B

$BF|Ln$5$s%3%a%s%H$"$j$,$H$&$4$6$$$^$9!#(B

> $B$A$g$C$H$@$1%3%a%s%H!D(B
> 
> >> On Tue, 2 Feb 1999 11:50:07 +0900, Hitoshi Kamata
> >> <hitoshi.kamata@fujixerox.co.jp> said:
> :> $B#1!K(Bifconfig$B$G(B-arp$B$r;XDj$7$F(BARP$B$r;H$($J$/$9$k(B
> :>     (firewall$B30B&$N(BNIC$B$H(Bfirewall$BFbB&$N(BNIC$BN>J}$KBP=h(B)
> :> $B#2!K(Bboot$B;~$K(Barp -s $B$G(BMAC$B%"%I%l%9$r8GDj$7$F$7$^$&!#(B
> :>     ($B30B&$HFbB&$NN>J}BP=h(B)
> 
> $B40A4$K8GDj$K$9$k$N$O!$$^$!0BA4$J$s$G$7$g$&$M!%$G$b;H$$>!<j$O$"$^$jNI$/(B
> $B$J$$$G$9$h$M!%(B

$B$?$7$+$K;d$b$=$&;W$$$^$9$,!#(B(;_;)
$B$?$@!"$H$j$"$($:%W%i%$%Y!<%H%"%I%l%9B&$N(BPC$B$N?t$,>/$J$$$N$H!"(B
$B%0%m!<%P%kB&$b>e0L$N%k!<%?Ey$N5!4oEy$G?t$,>/$J$$$N$G!"(B
$B$J$s$H$+$,$s$P$C$F$_$^$9!#(B

> >> $B<!$N9=@.$G!"%U%!%$%"!<%&%)!<%k5!!J(BFreebsd$B!K$H(BPC(Windows9x/NT)$B$H$N(B
> >> $BDL?.$,$G$-$J$$$J$j:$$C$F$*$j$^$9!#(B
> 
> >> $B8=>]!K(B
> >> $B!&30B&MQ$N(BNIC$B$+$i(BPrivete$B%"%I%l%9(B192.168.0.2$B$N(Barp$B%j%/%(%9%H$,Mh$k!J$*$=$i$/!K(B
> >> $B!&(B/var/log/messages$B$K0J2<%a%C%;!<%8$,>e$,$k(B
> >> /kernel: arp: 192.168.0.2 moved
> >> from  ($B@5$7$$(BMAC$B%"%I%l%9(B) to$B!JIT@5$N(BMAC$B%"%I%l%9!K(B
> 
> kernel$B$,$=$&$$$&$+$i$K$O!$%=!<%9%"%I%l%9$H$7$F(B192.168.0.2$B$r;}$C$?%Q%1%C(B
> $B%H$,!$(Bfirewall$BB&(BNIC$B$,@\B3$7$F$$$k(BLAN$B%;%0%a%s%H$KN.$l$?$N$G$O$J$$$G$9$+(B?
> $B$@$C$F(B192.168.0.2$B$N(BMAC$B%"%I%l%9$r65$($F!$$H$$$&(BARP$B%j%/%(%9%H$,Mh$?$+$i(B
> $B$H$$$C$F!$(Bkernel$BFb$N(B192.168.0.2$B$K4X$9$k(BARP$B%F!<%V%k$O=q$-$+$o$j$^$;$s$h(B
> $B$M!%(B
> 
> $BK\Mh$N2r7h$O!$$=$NJQ$J%Q%1%C%H$r$H$i$(!$Aw=P85$rD4$Y$k$3$H$G$O$J$$$+$H(B
> $B;W$$$^$9!D(B
> 
> firewall$B$N30B&$O(BThe Internet$B$J$N$G$7$g$&$+(B? $B$b$7$=$&$J$i!$(B192.168.0.2
> $B$K4X$9$k%Q%1%C%H$,$=$3$K=P$5$l$k$@$1$G!$$+$J$jJQ$G$9$h$M!%(B
> $B99$K30B&$K(Bfirewall$B$,$"$C$F!$:#2sLdBj$N%;%0%a%s%H$,4K>WCOBS$G$"$k$J$i%m!<(B
> $B%+%k%"%I%l%9$G$"$k$3$H<+BN$OLdBj$8$c$J$$$N$+$J(B?

firewall$B$N30B&$O(BThe Interenet$B$G$9!#(B
$BK\Mh$O!"(B192.168.0.2$B$,N.$l$F$O$J$i$J$$H&$G$9$,!"(B
$B:#2s$N@\B34D6-$G$O!"8=<B$O$$$m$s$J?M$,$$$F:$$C$F$$$k$H$3$m$G$9!#(B
$B>e0L$N(BISP$B$N4IM}<T$b$3$^$C$F$$$k$h$&$G$9!#(B

> >> $B<ALd!K(B
> >> $B30B&$N(BARP$B$KBP$7$F$N%"%/%;%9@)8B$9$kJ}K!$O$"$k$N$G$7$g$&$+!)(B
> >> $B$"$k$$$O!"$3$N8=>]$r2sHr$9$kJ}K!$O$"$k$N$G$7$g$&$+!)(B
> 
> $B$d$C$?$3$H$J$$$N$G%R%s%H$@$1$G$9$,!$(Bipfw$B$r$*;H$$$N$h$&$G$9$+$i!$(B
> $B!V(Bvia ifX$B!W;XDj$H!V(Bsrc$B!W!$!V(Bdst$B!W;XDj$rAH$_9g$o$;$l$P2?$H$+$J$k$N$G$O(B
> $B$J$$$G$7$g$&$+(B?
> $B!t(B $B%M%C%H%o!<%/@_7W>e!$(Bfirewall$B30B&$K(B192.168.0.*$B$,B8:_$7$J$$$J$i(B
> $B=q$-$C$Q$J$7$G$9$_$^$;$s$,!$2?$+;29M$K$J$l$P!%(B

$B8=:_(Bipfw$B$G!"(B
allow ip from 192.168.0.0/24 to 192.168.0.0/24 via $BFbB&$N(BNIC
$B$N$_(BOK$B$K$7$F$$$^$9$,!"$3$l$O8z2L$"$j$^$;$s$G$7$?!#(B
src$B$H(Bdst$B$O$d$C$F$J$$$N$G!":#EYD)@o$7$F$_$^$9!#(B

$B5.=E$J0U8+$"$j$,$H$&$4$6$$$^$7$?!#(Bm(__)m
==
Hitoshi Kamata($B3yEDEy(B)


