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Date: Sun, 21 Nov 2004 22:17:40 +0900
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Subject: [FreeBSD-users-jp 81876] Re: IPsec
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$BAp0fED(B@$B%$%0%8%C%H$G$9!#(B

$B"t(Bping$B$N7o$G$O!"%P%+$^$k$@$7$G$9$_$^$;$s!&!&(B
$B"t:G=i$K(B "ping -s packetsize 1500 192.168.0.1" $B$H>R2p$7$F$$$?%5%$%H$r(B
$B"t8+$F$7$^$C$F$$$F!"40A4$K?.$89~$s$G$$$^$7$?!&!&(B(; ;
$B"t$O$:$+$A$#!&!&(B


> On 2004/11/17, at 14:15, Kazuhisa Yokota wrote:
>
>> VPN$B$G$O(BMTU$B$,>.$5$/$J$k$3$H$,B?$$$?$a!$$3$3$r%U%k%5%$%:(B(1500$B%P%$%H(B)
>> $B$N%Q%1%C%H$,DL2a$9$k$H%U%i%0%a%s%H$,5/$-$^$9!%(B


$B$3$l$@$C$?$h$&$G$9!*(B
$B$3$l$G$O2r7h$H$O8@$$$,$?$$$G$9$,!&!&(B


$B!Z<B83$H7k2L!J0lJbA0?J"v!K![(B
$B:F8=<B83$r$9$k$?$a$K!"(B

<Host_a>----<Gateway_A>---Internet---<Gateway_B>---<Host_b>

$B!!!!!!!!!!!!!!!!!!!!!!!!!!"-(B
<Host_a>----<Gateway_A>---HUB---<Gateway_B>---<Host_b>

$B$r:n$C$F!";n83$7$^$7$?!#(B
$B"t2s@~$K4X$9$k5?$$$r$J$/$9$?$a$G$9!#(B

$B$3$3$G!"(B<Host_a>$B$+$i(B
$B!J3'MM$K65$o$C$?$d$jJ}$G!&!&(B(^^;$B!K(B

ping -s 1500 <Host_b>

$B$rBG$C$F$_$^$9!#(B

$B$=$7$F!"(B<Host_a>$B$G(B

#ifconfig em0 mtu 1434

$B$H$9$k$3$H$G!"0BDj$7$?1~Ez$,F@$i$l$k$h$&$K$J$j$^$7$?!#(B




$B!Z5?LdE@$=$N(B1$B![(B
$B$7$+$7!"5?Ld$O;D$j$^$9!#(B

<Gateway_A><Gateway_B>$B$N(Bgif0$B$N(BMTU$B$O%G%U%)%k%H$G(B1280$B$G$7$?!#(B
<Host_a>$B$N(BMTU$B$O!">/$J$/$H$b(B1280$B!A(B1434$B$N4V$G(Bping$B$N1~Ez$,<u$1<h$l$k$N$G$9$,!"(B
1435$B$+$i>e$N?tCM$G$O!"1~Ez$,$J$/$J$j$^$9!#(B
<Host_a>$B$H(B<Host_b>$B$N4V$N(BPath MTU Discovery$B$,!"$=$N?tCM0J>e$G$O5!G=$7$J$/(B
$B$J$k$H$$$&$3$H$G$7$g$&$+!&!&!)!)(B

$B$H$$$&$3$H$O!"(B<Host_b>$B!J$3$N;R$O:G=*E*$K$O(BWindows2000$B$N%/%i%$%"%s%H(BPC$B$K(B
$BCV$-49$o$k$N$G$9$,!K$N(BMTU$B$b9J$C$F$"$2$J$$$H!">-Mh$N1?MQ$,0BDj$7$J$$$H$$$&(B
$B$3$H$K$J$k$N$G$7$g$&$+!&!&!#(B
$B!J(BWin2000$B$N(BMTU$B$C$F!"(Broute$B$4$H$K9J$l$k$N$+$7$i!&!&!)!)!K(B

$B"t:G=*E*$K$O!"(B<Host_a>$B$,(BPostgresSQL Server$B!"(B<Host_b>$B$,(BMS Access$B%/%i%$%"%s%H(B
$B"t$H$$$&9=@.$K$J$kM=Dj$J$N$G!&!&(B



$B!Z5?LdE@$=$N(B2$B![(B

On 2004/11/17, at 13:50, HIGASHI Taku wrote:
>
>   MTU$B%5%$%:$NJQ99$O!"(Broute$B%3%^%s%I$N(B -mtu $B%Q%i%a!<%?$G@_Dj2DG=$G$9!#(B


$B:#2s!"(Broute$B%3%^%s%I$N;H$$J}$,$$$^$$$A%T%s$H$3$J$+$C$?$N$G!"(B
ifconfig$B%3%^%s%I$G;n83$7$^$7$?$,!"$d$jJ}$H$7$F$O6/0z$@$C$?$H;W$$$^$9$7!"(B
$B$3$l$G$O(B<Host_a>$B$N%>!<%s$NJ}!9$+$iITK~$,$G$k$+$b$7$l$^$;$s$h$M!&!&!#(B
$B$J$N$G!"(B<Host_a>$B$+$i(Bvpn$B$X%G!<%?$rAw?.$9$k$H$-!V$@$1!W(BMTU$B$r9J$k$?$a$K!"(B
<Host_a>$B$N(B/etc/rc.conf$B$G!"(B

static_routes="vpn"
route_vpn="-net 192.168.0.0/24 192.168.1.254 -mtu 1434"


$B$H$+!"$d$C$F$_$?$j$7$F!"$=$l$J$j$K8z2L$O$G$F$$$k$h$&$J$N$G$9$,!"(B
$B$3$N(BMTU$B$N@_Dj$,@8$-$F$$$k$+$I$&$+$r!"$I$&$d$C$F3N$+$a$l$P$h$$$N$G$7$g$&$+!&!&!&!)(B

