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From: Nobuaki Saito <seven@cafe.email.ne.jp>
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Subject: [FreeBSD-users-jp 80635] Re: PPTP =?ISO-2022-JP?B?GyRCJV4bKEI=?=
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$B:XF#$G$9!#(B

$B%k!<%F%#%s%0$O5?$C$?$N$G$9$,!"(Btcpdump$B$K;W$$5Z$P$:$G$7$?!#(B

> $B!&!V(Bsysctl net.inet.ip.forwarding$B!W$N7k2L$O!V(B1$B!W$H=PNO$5$l$k$+(B.

% sysctl -a | grep net.inet.ip.forwarding
net.inet.ip.forwarding: 1


> $B!&!V(Btcpdump -i tun0$B!W!V(Btcpdump -i tun1$B!W$H$d$C$F(B, 192.168.26.x $B"*(B
>   192.168.20.y $B$N%Q%1%C%H$,$I$A$i$G$b%-%c%W%A%c$5$l$k$+(B.

192.168.20.y$B$+$i$N(Bping$B$NMM;R$r(Bpptp-sv$B>e$G%b%K%?$7$F$_$^$7$?!#(B
tun0$B$,(B192.168.20$BB&!"(Btun1$B$,(B192.168.26$BB&$G$9!#(B

tcpdump: listening on tun0
18:28:50.734939 192.168.20.120 > 192.168.26.10: icmp: echo request
18:28:51.742557 192.168.20.120 > 192.168.26.10: icmp: echo request
18:28:52.752463 192.168.20.120 > 192.168.26.10: icmp: echo request
18:28:53.762381 192.168.20.120 > 192.168.26.10: icmp: echo request
18:28:54.769172 192.168.20.120 > 192.168.26.10: icmp: echo request
^C
5 packets received by filter
0 packets dropped by kernel
seven@civic% sudo tcpdump -i tun1
tcpdump: listening on tun1
18:28:58.818711 192.168.20.120 > 192.168.26.10: icmp: echo request
18:28:59.817173 192.168.20.120 > 192.168.26.10: icmp: echo request
18:29:00.828960 192.168.20.120 > 192.168.26.10: icmp: echo request
18:29:01.838878 192.168.20.120 > 192.168.26.10: icmp: echo request
18:29:02.848462 192.168.20.120 > 192.168.26.10: icmp: echo request
^C
5 packets received by filter
0 packets dropped by kernel

$B$3$l$r8+$F!"(B192.168.26.y$B$+$i%Q%1%C%H$,5"$C$F$-$F$J$$$3$H$K5$$,IU$-!"(B
192.168.26.0/24$BB&$N%k!<%?$r%A%'%C%/$7$F$_$k$H!"%k!<%F%#%s%0$N@_Dj8m$j(B
$B$,8+$D$+$j$^$7$?!"$3$l$GL5;v2r7h$G$-$=$&$G$9!#(B

$B$"$j$,$H$&$4$6$$$^$7$?!#(B
