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$B$I$&$b$G$9Cf@n$G$9!#(B
> ifconfig -a $B$N7k2L$H!$(Bnetstat -rn
> $B$N7k2L$,$"$k$H2r7h$^$GAa$$$+$b(B
> $B$7$l$^$;$s!%(B

$B>e5-7k2L$O!!(B-----$B$3$3$+$i(B
$B!{(Bifconfig -a $B7k2L!J(BFreeBSD$B%k!<%?!K(B
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST>
mtu 1500
	options=8<VLAN_MTU>
	inet6 fe80::2d0:59ff:feaa:39d3%fxp0 prefixlen 64 scopeid
0x2 
	ether 00:d0:59:aa:39:d3
	media: Ethernet 10baseT/UTP
	status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	inet 127.0.0.1 netmask 0xff000000 
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 
re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST>
mtu 1454
	options=18<VLAN_MTU,VLAN_HWTAGGING>
	inet 192.168.0.254 netmask 0xffffff00 broadcast
192.168.0.255
	inet6 fe80::20d:bff:fe49:133%re0 prefixlen 64 scopeid 0x4

	ether 00:0d:0b:49:01:33
	media: Ethernet autoselect (100baseTX <full-duplex>)
	status: active
tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu
1454
	inet 200.201.202.203 --> 200.201.202.205 netmask
0xffffff00 
	Opened by PID 227

$B!{(Bnetstat -rn $B7k2L!J(BFreeBSD$B%k!<%?!'LLE]$G$9$N$GA4$F;/$7(B
$B$^$9!K(B
Routing tables

Internet:
Destination        Gateway            Flags    Refs     
Use  Netif Expire
default            210.130.182.100    UGS         0      
24   tun0
127.0.0.1          127.0.0.1          UH          0       
0    lo0
192.168.0          link#4             UC          0       
0    re0
192.168.0.10       00:e0:18:d9:a1:69  UHLW        0       
9    re0   1041
192.168.0.254      00:0d:0b:49:01:33  UHLW        0      
24    lo0
200.201.202.205    200.201.202.203     UH          1      
 0   tun0

Internet6:
Destination                       Gateway                 
     Flags      Netif Expire
::1                               ::1                     
     UH          lo0
fe80::%fxp0/64                    link#2                  
     UC         fxp0
fe80::2d0:59ff:feaa:39d3%fxp0     00:d0:59:aa:39:d3       
     UHL         lo0
fe80::%lo0/64                     fe80::1%lo0             
     U           lo0
fe80::1%lo0                       link#3                  
     UHL         lo0
fe80::%re0/64                     link#4                  
     UC          re0
fe80::20d:bff:fe49:133%re0        00:0d:0b:49:01:33       
     UHL         lo0
ff01::/32                         ::1                     
     U           lo0
ff02::%fxp0/32                    link#2                  
     UC         fxp0
ff02::%lo0/32                     ::1                     
     UC          lo0
ff02::%re0/32                     link#4                  
     UC          re0
ff02::%tun0/32                   
fe80::220:e0ff:fe89:e534%tun0 UC         tun0


-----$B!!$3$3$^$G(B

> 
> $B$^$?!$$I$N%"%I%l%9$K(B ping
> $BEy$G3NG'=PMh$?$+$b$"$l$PNI$$$H;W$$$^$9!%(B
> traceroute $B$N7k2L$J$I$b!%(B

$B>e5-7k2L$O!"(B----$B$3$3$+$i(B
$B!{(Bping$B7k2L!J(BFreeBSD$B%k!<%?!K(B
#ping www.yahoo.co.jp
PING www.yahoo.co.jp (210.81.3.241): 56 data bytes
64 bytes from 210.81.3.241: icmp_seq=0 ttl=245 time=31.719
ms
64 bytes from 210.81.3.241: icmp_seq=1 ttl=245 time=31.776
ms
64 bytes from 210.81.3.241: icmp_seq=2 ttl=245 time=32.746
ms

--- www.yahoo.co.jp ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 31.719/32.080/32.746/0.471
ms

#ping www.google.com
PING www.l.google.com (66.102.7.104): 56 data bytes
64 bytes from 66.102.7.104: icmp_seq=0 ttl=242
time=129.204 ms
64 bytes from 66.102.7.104: icmp_seq=1 ttl=242
time=129.248 ms
64 bytes from 66.102.7.104: icmp_seq=2 ttl=242
time=131.620 ms

--- www.l.google.com ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev =
129.204/130.024/131.620/1.129 ms

$B!{(Btraceroute$B7k2L!J(BFreeBSD$B%k!<%?!K(B#$B$3$A$i$bLLE]$@$+$i;/$7(B
$B$A$c$$$^$9!&!&(B^^;
 1  aichi-a01.flets.2iij.net (210.130.182.100)  50.898 ms 
17.182 ms  18.945 ms
 2  210.130.182.97 (210.130.182.97)  17.484 ms  14.907 ms 
16.499 ms
 3  ngy003lip10.IIJ.Net (202.232.14.229)  18.286 ms 
18.080 ms  18.808 ms
 4  ngy003bb00.IIJ.Net (210.130.232.209)  16.381 ms 
16.452 ms  17.152 ms
 5  tky001bb01.IIJ.Net (202.232.0.18)  31.450 ms  31.762
ms  29.312 ms
 6  tky001agr10.IIJ.Net (210.130.143.226)  30.125 ms 
30.889 ms  31.017 ms
 7  ns01.iij4u.or.jp (210.130.0.1)  31.833 ms  30.143 ms 
31.126 ms

----$B!!$3$3$^$G(B
> 
> $B$"$H!$%k!<%?5!$+$i$O7R$,$C$F$$$k$H$N;v$G$9$N$G!$(B
> sysctl net.inet.ip.forwarding
> $B$N7k2L$b$"$l$PNI$$$+$J(B? $B$H;W$$$^$9!%(B

$B>e5-7k2L$O(B----$B$3$3$+$i(B
$B!{(Bsysctl$B7k2L!J(BFreeBSD$B%k!<%?!K(B
net.inet.ip.forwarding: 1
----$B$3$3$^$G(B


> kernel config $B%U%!%$%k$N(B NETGRAPH
> $B%*%W%7%g%s$G$9$,!$CfESH>C<$K(B
> $B%9%?%F%#%C%/$KAH$_9~$s$@>l9g!$5sF0$,$*$+$7$/$J$C$?7P83(B
$B$,$"$j$^$9!%(B
> $B:G=i$O$9$Y$FF0E*$KAH$_9~$^$;$F(B user-ppp
> $B$rF0:n$5$;!$AH$_9~$^$l(B
> $B$?%b%8%e!<%k$r%9%?%F%#%C%/$K(B kernel config
> $B%U%!%$%k$K=q$/$N$,NI(B
> $B$$$+$H;W$o$l$^$9!%(B

$B$40FFb$N$H$*$j!">/!9??;w$5$;$FD:$$$F(B
> 
> $B;d$,(B user-ppp
> $B$r;H$&:G$KAH$_9~$s$@%*%W%7%g%s$O0J2<$N$H$*$j$G$9!%(B
> 
> options         NETGRAPH
> options         NETGRAPH_ASYNC
> options         NETGRAPH_BPF
> options         NETGRAPH_ECHO
> options         NETGRAPH_ETHER
> options         NETGRAPH_PPPOE
> options         NETGRAPH_RFC1490
> options         NETGRAPH_SOCKET

$B$rDI2C$7%+!<%M%k$N:F9=C[$r9T$$!"$4;XE&$N$H$*$j(B

> > $B!{(B/etc/ipnat.rules
> > rdr tun0 200.201.202.203/32 -> 192.168.0.0/24 
> $B$OJQ$J%k!<%k$G$9!%$I$3$K%j%@%$%l%/%H$7$FNI$$$N$+$,$o$+(B
$B$j$^$;$s!%(B
> 
> map tun0 192.168.0.0/24 -> 0/32 portmap tcp/udp auto
> map tun0 192.168.0.0/24 -> 0/32
> $B$H$9$k$H(B tun0 $B$+$i(B nat $B$,$+$+$C$F;]$/9T$/$N$G$O(B?
> $B$H;W$$$^$9!%(B

$B$H$d$C$F$_$^$7$?$,ABDL$7$^$;$s$G$7$?!#0lBN2?8N$G$7$g$&$M(B^^;


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