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To: FreeBSD-users-jp@jp.freebsd.org
From: "K.[NAO-NAO].Kawai" <kawai@cks.canon.co.jp>
In-Reply-To: Your message of "Tue, 28 Mar 2000 02:57:02 +0900"
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Date: Tue, 28 Mar 2000 13:37:57 +0900
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Subject: [FreeBSD-users-jp 50858] Re: ifilter
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$B$+$o$$!w$-$d$N$s(B

From: "zefimia(hidetoshi)" <zefimia@cds.ne.jp>
Subject: [FreeBSD-users-jp 50856] Re: ifilter$B$N=q<0(B
Date: Tue, 28 Mar 2000 02:57:02 +0900

$B$<(B>>  $B!V<+J,$,<u$1$k$b$N!W$C$F$$$&I=8=$,NI$/$o$+$j$^$;$s!#(B
$B$<(B>>  src/dst $B$O;XDj$O!"2?$r%U%#%k%?%j%s%0$7$?$$$N$+$K$h$C$F7hDj$9$k(B
$B$<(B>>  $B$b$N$J$N$G!"6qBNE*$JL\E*$,$O$C$-$j$7$J$$$H7h$a$h$&$,$J$$$H(B
$B$<(B>>  $B;W$$$^$9$1$I!D(B
$B$<(B>$B%5%s%W%k$r$h$s$G8+$^$7$?$,$&$^$/$o$+$j$^$;$s$G$7$?!#(B
$B$<(B>$B!J$J$<$J$i!"$9$Y$F(B
$B$<(B>set filter out 0  permit 0/0 0/0 tcp src eq 53
$B$<(B>set filter out 1  permit 0/0 0/0 tcp dst eq 53
$B$<(B>$B$NMQ$K!"BP$K$J$C$F<($5$l$F$*$j;H$$J,$1$N(B
$B$<(B>$BI,MW@-$,FI$_$H$l$J$+$C$?$+$i$G$9!K(B
$B$3$&$$$&(B filter $B$O!"(BTCP/IP $B$N(B packet $B$r85$K$7$F9M$($k$s$G$7$g$&!#(B

TCP(UDP)/IP $B$K$O!"$+$J$i$:(B 
source IP/destination IP/source port/destination port
$B$,$D$$$FMh$^$9!#9T$-$N(B packet $B$H!"5"$j$N(B packet $B$O(B
src/dest $B$,H?BP$K$J$C$?$b$N$,(Bsrc/dest $B$KF~$C$FLa$C$FMh$^$9!#(B

$B$3$N9=B$$r$o$+$C$F$l$P$=$s$J$K$o$+$i$J$$J*$G$O$J$$$O$:!#(B
$B!t$3$N9=B$CN$i$:$K$o$+$k$N$O!"BgJQ$@$H;W$&!#(B

$BIaDL$N(B user program $B$,;O$a$k(B socket $B$O(B src port $B$O!"G$0U!#(B
dest port $B$KAj<j$N(B well known port$B!#(B
user $BB&C<Kv$+$i8+$l$P=P$F9T$/(B packet $B$O!"(B
http $B$J$i!"(BsrcIP $B$O(B $B<+(B IP $B$G!"(Bsrc port $B$O!"$$$m$$$m!"(BdestIP $B$OAj<j(BIP$B!"(Bdest port $B$O!"(B80
ftp $B$J$i!"(BsrcIP $B$O(B $B<+(B IP $B$G!"(Bsrc port $B$O!"$$$m$$$m!"(BdestIP $B$OAj<j(BIP$B!"(Bdest port $B$O!"(B21
$B5U$K!"(Bpassive $B$G$J$$(B ftp $B$G$O(B
ftp data $B$O!"(BsorcIP $B$O(B $B<+(B IP $B$G!"(Bsrc port $B$,(B20$B!"(BdestIP $B$OAj<j(BIP$B!"(Bdest port $B$O!"$$$m$$$m!#(B
$B$H$+!#(B
