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-Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
-Copyright (C) 2001  Internet Software Consortium.
-See COPYRIGHT in the source root or http://isc.org/copyright.html for terms.
-
-$Id: migration-4to9,v 1.4 2004/03/05 05:04:53 marka Exp $
-
-		   BIND 4 to BIND 9 Migration Notes
-
-To transition from BIND 4 to BIND 9 you first need to convert your
-configuration file to the new format.  There is a conversion tool in
-contrib/named-bootconf that allows you to do this.
-
-	named-bootconf.sh < /etc/named.boot > /etc/named.conf
-
-BIND 9 uses a system assigned port for the UDP queries it makes rather
-than port 53 that BIND 4 uses.  This may conflict with some firewalls.
-The following directives in /etc/named.conf allows you to specify
-a port to use.
-
-	query-source address * port 53;
-	transfer-source * port 53;
-	notify-source * port 53;
-
-BIND 9 no longer uses the minimum field to specify the TTL of records
-without a explicit TTL.  Use the $TTL directive to specify a default TTL
-before the first record without a explicit TTL.
-
-	$TTL 3600
-	@	IN	SOA	ns1.example.com. hostmaster.example.com. (
-				2001021100
-				7200
-				1200
-				3600000
-				7200 )
-
-BIND 9 does not support multiple CNAMEs with the same owner name.
-	
-	Illegal:
-	www.example.com. CNAME host1.example.com.
-	www.example.com. CNAME host2.example.com.
-
-BIND 9 does not support "CNAMEs with other data" with the same owner name,
-ignoring the DNSSEC records (SIG, NXT, KEY) that BIND 4 did not support.
-
-	Illegal:
-	www.example.com. CNAME host1.example.com.
-	www.example.com. MX 10 host2.example.com.
-
-BIND 9 is less tolerant of errors in master files, so check your logs and
-fix any errors reported.  The named-checkzone program can also be to check
-master files.
-
-Outgoing zone transfers now use the "many-answers" format by default.
-This format is not understood by certain old versions of BIND 4.  
-You can work around this problem using the option "transfer-format
-one-answer;", but since these old versions all have known security
-problems, the correct fix is to upgrade the slave servers.