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Date:      Tue, 07 Mar 2017 18:26:32 +0900 (JST)
From:      Ryuji MATSUMOTO <matumoto@pluto.ai.kyutech.ac.jp>
To:        freebsd-users-jp@freebsd.org
Subject:   [FreeBSD-users-jp 96055] =?iso-2022-jp?b?RE5TGyRCJHI0RjtrJDckRkYwRSokSxsoQmlwZnc=?= =?iso-2022-jp?b?GyRCJE4layE8JWskckRJMkMbKEIvGyRCOm89fCQ5JGslRCE8JWsbKEI=?= =?iso-2022-jp?b?GyRCISUbKEI=?=
Message-ID:  <20170307.182632.2029998101879781962.matumoto@pluto.ai.kyutech.ac.jp>

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$B>>85!wJ!2,$G$9!%(B

$B$3$&$$$&%D!<%k$r$4B8CN$NJ}$O$$$i$C$7$c$$$^$;$s$+!%(B

FreeBSD$B$N(BFirewall(ipfw)$B$K(B hostname$B$r5-:\$7$F$b!$(Bipfw$B$,<B9T(B
$B$5$l$?;~$K0z$$$?(BIP$B%"%I%l%98GDj$K$J$k$h$&$G$9!%(B

http://www.jp.freebsd.org/man-jp/search.html
$BF|K\8l%^%K%e%"%k(B RELEASE 10-1-RELEASE-K
ipfw
---
	numeric-ip | hostname
        $B%I%C%H$G6h@Z$C$??t;z(B 4 $B$DAH$^$?$O%[%9%HL>$G;XDj$7$?!"(B1 $B$D(B
        $B$N(B IPv4 $B%"%I%l%9$,E,9g$7$^$9!#%[%9%HL>$NL>A02r7h$O!"$=$N(B
        $B5,B'$,%U%!%$%"%&%)!<%k$N%j%9%H$KDI2C$5$l$k$H$-$K9T$o$l$^(B
        $B$9!#(B
---

$B>e5-$@$H(Bhostname-IP$B%"%I%l%9$NBP1~$,JQ2=$7$?;~$KF0$+$J$/$J$k$N$G!$Dj4|E*(B
$B$K(BDNS$B$r;2>H$7$F(B Firewall$B$N%k!<%k$r99?7$7$F$/$l$k%D!<%k$G$9!%(B

$B6qBNE*$K$d$j$?$$;v$O!$30It$N(BSMTP/IMAP$B%5!<%P$N(BIP$B$r4F;k$7$F$F(BIP$B%"%I%l%9$K(B
$BJQF0$,$"$l$P99?7$9$k!%(B($B6qBNE*$K$O(BGmail/Office365$B!%(B)

$BNc$($P(Bimap$B%5!<%P8~$1$K(Bport$B$r3+$1$k(Bipfw$B%k!<%k(B12340-12341$B$,$"$k$H$7$^$9!%(B

imap.example.com : IP$B$,(B192.0.2.1, 192.0.2.2$B$H$7$^$9!%(B 

> 12340 allow tcp from LOCAL-IP to 192.0.2.1 dst-port 993
> 12341 allow tcp from LOCAL-IP to 192.0.2.2 dst-port 993

$B$3$l(BIP$B$,JQ2=$7$?$iL58z$K$J$j$^$9!%$J$N$G!$$3$s$J46$8$G(B

while(1)
{
	sleep(1$B;~4V$0$i$$(B);
	
	dig +short imap.example.com > ip-list.txt

	if(ip-list.txt$B$NCf?H$,JQF0$7$?(B)
	{
		ipfw$B%k!<%kHV9f(B 12340-12341$B$r:o=|$9$k!%(B
		ipfw$B%k!<%kHV9f(B 12340-12341$B$N=j$K?7$7$$%k!<%k$rDI2C$9$k!%(B
	}
}

$B$3$&$$$&;v$r$d$C$F$/$l$k%D!<%k$,$I$3$+$K$"$j$=$&$J5$$,$9$k$N$G$9$,!%(B

--
$B>>85N4Fs(B 


  



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