></DT
><DT
>6.3. <A
-HREF="Bv9ARM.ch06.html#AEN4036"
+HREF="Bv9ARM.ch06.html#AEN4035"
>Zone File</A
></DT
></DL
></DT
><DD
><P
-> This option was used in BIND 8 to restrict the character set of
-domain names in master files and/or DNS responses received from the
-network. BIND 9 does not restrict the character set of domain names
-and does not implement the <B
-CLASS="command"
->check-names</B
-> option.
+> This option is used to restrict the character set and syntax of
+certain domain names in master files and/or DNS responses received from the
+network.
</P
></DD
><DT
><DIV
CLASS="informaltable"
><A
-NAME="AEN3995"
+NAME="AEN3994"
></A
><P
></P
><H1
CLASS="sect1"
><A
-NAME="AEN4036"
+NAME="AEN4035"
>6.3. Zone File</A
></H1
><DIV
><H3
CLASS="sect3"
><A
-NAME="AEN4041"
+NAME="AEN4040"
>6.3.1.1. Resource Records</A
></H3
><P
><DIV
CLASS="informaltable"
><A
-NAME="AEN4047"
+NAME="AEN4046"
></A
><P
></P
><DIV
CLASS="informaltable"
><A
-NAME="AEN4079"
+NAME="AEN4078"
></A
><P
></P
><DIV
CLASS="informaltable"
><A
-NAME="AEN4231"
+NAME="AEN4230"
></A
><P
></P
><H3
CLASS="sect3"
><A
-NAME="AEN4255"
+NAME="AEN4254"
>6.3.1.2. Textual expression of RRs</A
></H3
><P
><DIV
CLASS="informaltable"
><A
-NAME="AEN4262"
+NAME="AEN4261"
></A
><P
></P
><DIV
CLASS="informaltable"
><A
-NAME="AEN4328"
+NAME="AEN4327"
></A
><P
></P
><H2
CLASS="sect2"
><A
-NAME="AEN4356"
+NAME="AEN4355"
>6.3.2. Discussion of MX Records</A
></H2
><P
><DIV
CLASS="informaltable"
><A
-NAME="AEN4362"
+NAME="AEN4361"
></A
><P
></P
><DIV
CLASS="informaltable"
><A
-NAME="AEN4454"
+NAME="AEN4453"
></A
><P
></P
><H2
CLASS="sect2"
><A
-NAME="AEN4477"
+NAME="AEN4476"
>6.3.4. Inverse Mapping in IPv4</A
></H2
><P
><DIV
CLASS="informaltable"
><A
-NAME="AEN4482"
+NAME="AEN4481"
></A
><P
></P
><H2
CLASS="sect2"
><A
-NAME="AEN4504"
+NAME="AEN4503"
>6.3.5. Other Zone File Directives</A
></H2
><P
><H3
CLASS="sect3"
><A
-NAME="AEN4511"
+NAME="AEN4510"
>6.3.5.1. The <B
CLASS="command"
>$ORIGIN</B
><H3
CLASS="sect3"
><A
-NAME="AEN4531"
+NAME="AEN4530"
>6.3.5.2. The <B
CLASS="command"
>$INCLUDE</B
><H3
CLASS="sect3"
><A
-NAME="AEN4551"
+NAME="AEN4550"
>6.3.5.3. The <B
CLASS="command"
>$TTL</B
><H2
CLASS="sect2"
><A
-NAME="AEN4562"
+NAME="AEN4561"
>6.3.6. <SPAN
CLASS="acronym"
>BIND</SPAN
><DIV
CLASS="informaltable"
><A
-NAME="AEN4586"
+NAME="AEN4585"
></A
><P
></P
></DT
><DT
>8.1. <A
-HREF="Bv9ARM.ch08.html#AEN4741"
+HREF="Bv9ARM.ch08.html#AEN4740"
>Common Problems</A
></DT
><DT
>8.2. <A
-HREF="Bv9ARM.ch08.html#AEN4746"
+HREF="Bv9ARM.ch08.html#AEN4745"
>Incrementing and Changing the Serial Number</A
></DT
><DT
>8.3. <A
-HREF="Bv9ARM.ch08.html#AEN4751"
+HREF="Bv9ARM.ch08.html#AEN4750"
>Where Can I Get Help?</A
></DT
></DL
><H1
CLASS="sect1"
><A
-NAME="AEN4741"
+NAME="AEN4740"
>8.1. Common Problems</A
></H1
><DIV
><H2
CLASS="sect2"
><A
-NAME="AEN4743"
+NAME="AEN4742"
>8.1.1. It's not working; how can I figure out what's wrong?</A
></H2
><P
><H1
CLASS="sect1"
><A
-NAME="AEN4746"
+NAME="AEN4745"
>8.2. Incrementing and Changing the Serial Number</A
></H1
><P
><H1
CLASS="sect1"
><A
-NAME="AEN4751"
+NAME="AEN4750"
>8.3. Where Can I Get Help?</A
></H1
><P
></DT
><DT
>A.1. <A
-HREF="Bv9ARM.ch09.html#AEN4767"
+HREF="Bv9ARM.ch09.html#AEN4766"
>Acknowledgments</A
></DT
><DT
><H1
CLASS="sect1"
><A
-NAME="AEN4767"
+NAME="AEN4766"
>A.1. Acknowledgments</A
></H1
><DIV
><H2
CLASS="sect2"
><A
-NAME="AEN4769"
+NAME="AEN4768"
>A.1.1. A Brief History of the <SPAN
CLASS="acronym"
>DNS</SPAN
><DIV
CLASS="informaltable"
><A
-NAME="AEN4805"
+NAME="AEN4804"
></A
><P
></P
<DIV
CLASS="informaltable"
><A
-NAME="AEN4874"
+NAME="AEN4873"
></A
><P
></P
</P
><H3
><A
-NAME="AEN4942"
+NAME="AEN4941"
>Bibliography</A
></H3
><H2
CLASS="bibliodiv"
><A
-NAME="AEN4943"
+NAME="AEN4942"
>Standards</A
></H2
><DIV
CLASS="biblioentry"
><A
-NAME="AEN4945"
+NAME="AEN4944"
></A
><P
>[RFC974] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN4952"
+NAME="AEN4951"
></A
><P
>[RFC1034] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN4959"
+NAME="AEN4958"
></A
><P
>[RFC1035] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN4968"
+NAME="AEN4967"
></A
><P
>[RFC2181] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN4976"
+NAME="AEN4975"
></A
><P
>[RFC2308] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN4984"
+NAME="AEN4983"
></A
><P
>[RFC1995] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN4992"
+NAME="AEN4991"
></A
><P
>[RFC1996] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN4999"
+NAME="AEN4998"
></A
><P
>[RFC2136] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5016"
+NAME="AEN5015"
></A
><P
>[RFC2845] <SPAN
><H2
CLASS="bibliodiv"
><A
-NAME="AEN5035"
+NAME="AEN5034"
>Proposed Standards Still Under Development</A
></H2
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5040"
+NAME="AEN5039"
></A
><P
>[RFC1886] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5052"
+NAME="AEN5051"
></A
><P
>[RFC2065] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5064"
+NAME="AEN5063"
></A
><P
>[RFC2137] <SPAN
><H2
CLASS="bibliodiv"
><A
-NAME="AEN5072"
+NAME="AEN5071"
>Other Important RFCs About <SPAN
CLASS="acronym"
>DNS</SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5075"
+NAME="AEN5074"
></A
><P
>[RFC1535] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5083"
+NAME="AEN5082"
></A
><P
>[RFC1536] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5104"
+NAME="AEN5103"
></A
><P
>[RFC1982] <SPAN
><H2
CLASS="bibliodiv"
><A
-NAME="AEN5115"
+NAME="AEN5114"
>Resource Record Types</A
></H2
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5117"
+NAME="AEN5116"
></A
><P
>[RFC1183] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5135"
+NAME="AEN5134"
></A
><P
>[RFC1706] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5147"
+NAME="AEN5146"
></A
><P
>[RFC2168] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5158"
+NAME="AEN5157"
></A
><P
>[RFC1876] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5175"
+NAME="AEN5174"
></A
><P
>[RFC2052] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5187"
+NAME="AEN5186"
></A
><P
>[RFC2163] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5195"
+NAME="AEN5194"
></A
><P
>[RFC2230] <SPAN
><H2
CLASS="bibliodiv"
><A
-NAME="AEN5203"
+NAME="AEN5202"
><SPAN
CLASS="acronym"
>DNS</SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5206"
+NAME="AEN5205"
></A
><P
>[RFC1101] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5214"
+NAME="AEN5213"
></A
><P
>[RFC1123] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5221"
+NAME="AEN5220"
></A
><P
>[RFC1591] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5228"
+NAME="AEN5227"
></A
><P
>[RFC2317] <SPAN
><H2
CLASS="bibliodiv"
><A
-NAME="AEN5242"
+NAME="AEN5241"
><SPAN
CLASS="acronym"
>DNS</SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5245"
+NAME="AEN5244"
></A
><P
>[RFC1537] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5253"
+NAME="AEN5252"
></A
><P
>[RFC1912] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5261"
+NAME="AEN5260"
></A
><P
>[RFC2010] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5272"
+NAME="AEN5271"
></A
><P
>[RFC2219] <SPAN
><H2
CLASS="bibliodiv"
><A
-NAME="AEN5284"
+NAME="AEN5283"
>Other <SPAN
CLASS="acronym"
>DNS</SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5290"
+NAME="AEN5289"
></A
><P
>[RFC1464] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5297"
+NAME="AEN5296"
></A
><P
>[RFC1713] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5305"
+NAME="AEN5304"
></A
><P
>[RFC1794] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5313"
+NAME="AEN5312"
></A
><P
>[RFC2240] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5320"
+NAME="AEN5319"
></A
><P
>[RFC2345] <SPAN
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5334"
+NAME="AEN5333"
></A
><P
>[RFC2352] <SPAN
><H2
CLASS="bibliodiv"
><A
-NAME="AEN5341"
+NAME="AEN5340"
>Obsolete and Unimplemented Experimental RRs</A
></H2
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5343"
+NAME="AEN5342"
></A
><P
>[RFC1712] <SPAN
><H2
CLASS="sect2"
><A
-NAME="AEN5364"
+NAME="AEN5363"
>A.3.3. Other Documents About <SPAN
CLASS="acronym"
>BIND</SPAN
></P
><H3
><A
-NAME="AEN5368"
+NAME="AEN5367"
>Bibliography</A
></H3
><DIV
CLASS="biblioentry"
><A
-NAME="AEN5369"
+NAME="AEN5368"
></A
><P
><SPAN
></DD
><DT
>6.3. <A
-HREF="Bv9ARM.ch06.html#AEN4036"
+HREF="Bv9ARM.ch06.html#AEN4035"
>Zone File</A
></DT
><DD
></DT
><DT
>6.3.2. <A
-HREF="Bv9ARM.ch06.html#AEN4356"
+HREF="Bv9ARM.ch06.html#AEN4355"
>Discussion of MX Records</A
></DT
><DT
></DT
><DT
>6.3.4. <A
-HREF="Bv9ARM.ch06.html#AEN4477"
+HREF="Bv9ARM.ch06.html#AEN4476"
>Inverse Mapping in IPv4</A
></DT
><DT
>6.3.5. <A
-HREF="Bv9ARM.ch06.html#AEN4504"
+HREF="Bv9ARM.ch06.html#AEN4503"
>Other Zone File Directives</A
></DT
><DT
>6.3.6. <A
-HREF="Bv9ARM.ch06.html#AEN4562"
+HREF="Bv9ARM.ch06.html#AEN4561"
><SPAN
CLASS="acronym"
>BIND</SPAN
></DT
><DT
>7.2. <A
-HREF="Bv9ARM.ch07.html#AEN4679"
+HREF="Bv9ARM.ch07.html#AEN4678"
><B
CLASS="command"
>chroot</B
><DL
><DT
>7.2.1. <A
-HREF="Bv9ARM.ch07.html#AEN4702"
+HREF="Bv9ARM.ch07.html#AEN4701"
>The <B
CLASS="command"
>chroot</B
></DT
><DT
>7.2.2. <A
-HREF="Bv9ARM.ch07.html#AEN4720"
+HREF="Bv9ARM.ch07.html#AEN4719"
>Using the <B
CLASS="command"
>setuid</B
><DL
><DT
>8.1. <A
-HREF="Bv9ARM.ch08.html#AEN4741"
+HREF="Bv9ARM.ch08.html#AEN4740"
>Common Problems</A
></DT
><DD
><DL
><DT
>8.1.1. <A
-HREF="Bv9ARM.ch08.html#AEN4743"
+HREF="Bv9ARM.ch08.html#AEN4742"
>It's not working; how can I figure out what's wrong?</A
></DT
></DL
></DD
><DT
>8.2. <A
-HREF="Bv9ARM.ch08.html#AEN4746"
+HREF="Bv9ARM.ch08.html#AEN4745"
>Incrementing and Changing the Serial Number</A
></DT
><DT
>8.3. <A
-HREF="Bv9ARM.ch08.html#AEN4751"
+HREF="Bv9ARM.ch08.html#AEN4750"
>Where Can I Get Help?</A
></DT
></DL
><DL
><DT
>A.1. <A
-HREF="Bv9ARM.ch09.html#AEN4767"
+HREF="Bv9ARM.ch09.html#AEN4766"
>Acknowledgments</A
></DT
><DD
><DL
><DT
>A.1.1. <A
-HREF="Bv9ARM.ch09.html#AEN4769"
+HREF="Bv9ARM.ch09.html#AEN4768"
>A Brief History of the <SPAN
CLASS="acronym"
>DNS</SPAN
></DT
><DT
>A.3.3. <A
-HREF="Bv9ARM.ch09.html#AEN5364"
+HREF="Bv9ARM.ch09.html#AEN5363"
>Other Documents About <SPAN
CLASS="acronym"
>BIND</SPAN