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System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP)
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Migrating From BIND 8 to BIND 9

BIND 9 is upwards compatible with most BIND 8 features. However, there are still a number of caveats you should be aware of when upgrading an existing BIND 8 installation to use BIND 9. Be sure to read the entire Migration Notes document before installing and using BIND 9. The Migration Notes are available at /usr/share/doc/bind/migration.txt. Also, the BIND package names have changed to SUNWbind and SUNWbindr. The SUNWbindr package contains the DNS server manifest.

The following list presents a brief overview of the differences between BIND 8 and BIND 9. Details are available in the Migration Notes.

  • Configuration File Compatibility

    • Unimplemented options warning message

    • transfer-format option changes

    • Configuration file errors

    • Logging categories have changed

    • Notify message and refresh query changes

    • Multiple classes change

  • Zone File Compatibility

    • Stricter rules for TTLs in zone file

    • SOA serial number changes

    • Unbalanced quotes cause errors

    • Line breaks, syntax change

    • Use \$ instead of $$ in domain names

  • Interoperability Impact of New Protocol Features

    • EDNS0 new in BIND 9

    • Zone transfers default change

  • Unrestricted Character Set

    • No restrictions on character set

    • Security issue, improper naming

  • Server Administration Tools

    • The rndc program replaces ndc

    • nsupdate: changes in multiple updates

  • No Information Leakage Between Zones

    • Glue NS records handled differently

  • Umask Not Modified

    • Possible umask permissions issues

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