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<HTML><HEAD>  <TITLE>BBS水木清华站∶精华区</TITLE></HEAD><BODY><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER>发信人:&nbsp;<A HREF="mailto:chen@cc.nctu.edu.tw">chen@cc.nctu.edu.tw</A>&nbsp;(C.S.Chen),&nbsp;看板:&nbsp;UNIX&nbsp;<BR>标&nbsp;&nbsp;题:&nbsp;[DNS/bind]&nbsp;Lame&nbsp;Server&nbsp;?&nbsp;(实例篇)&nbsp;<BR>发信站:&nbsp;National&nbsp;Chiao-Tung&nbsp;University,&nbsp;Taiwan&nbsp;(Sun&nbsp;Mar&nbsp;30&nbsp;20:17:54&nbsp;1997)&nbsp;<BR>转信站:&nbsp;sobee!netnews.ntu!news.mcu!news.cs.nthu!news.cis.nctu!news-peer.nctu!n&nbsp;<BR>&nbsp;<BR>&nbsp;<BR>bind/4.9.x&nbsp;Lame&nbsp;Server&nbsp;讯息所代表的意义&nbsp;(&nbsp;实例篇&nbsp;)&nbsp;<BR>=======================================&nbsp;<BR>&nbsp;<BR>&nbsp;Lame&nbsp;Server&nbsp;的成因,&nbsp;从理论上来看,&nbsp;就是两个条件:&nbsp;<BR>&nbsp;----------------------------------------------&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;a)&nbsp;NS&nbsp;delegated&nbsp;(被授权)&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;b)&nbsp;non-authoritative&nbsp;(没有该&nbsp;domain&nbsp;zone&nbsp;的全部资料,&nbsp;e.g&nbsp;SOA,&nbsp;...)&nbsp;<BR>&nbsp;<BR>&nbsp;<BR>这□有&nbsp;4&nbsp;行&nbsp;Lame&nbsp;Server&nbsp;的&nbsp;sample&nbsp;messages,&nbsp;&nbsp;前&nbsp;2&nbsp;行属&nbsp;forward&nbsp;domain&nbsp;zone,&nbsp;<BR>後两行属&nbsp;reverse&nbsp;domain&nbsp;zone.&nbsp;底下,&nbsp;分别加以说明.&nbsp;<BR>&nbsp;<BR>--------------&lt;&nbsp;Forward&nbsp;domain&nbsp;zone&nbsp;&gt;----------------------------------------&nbsp;<BR>Mar&nbsp;30&nbsp;12:09:31&nbsp;ns&nbsp;named[3544]:&nbsp;Lame&nbsp;server&nbsp;on&nbsp;'www.catv.com.tw'&nbsp;(in&nbsp;'catv.COM.tw'?):&nbsp;[203.67.199.1].53&nbsp;'igndns.gcn.net.tw':&nbsp;learnt&nbsp;(A=203.77.2.139,NS=140.92.1.50)&nbsp;<BR>Mar&nbsp;30&nbsp;13:44:32&nbsp;ns&nbsp;named[3544]:&nbsp;Lame&nbsp;server&nbsp;on&nbsp;'ftp.wownet.net.tw'&nbsp;(in&nbsp;'wownet.net.tw'?):&nbsp;[203.79.6.2].53&nbsp;'ns.wownet.net.tw':&nbsp;learnt&nbsp;(A=140.111.1.2,NS=140.111.1.2)&nbsp;<BR>--------------&lt;&nbsp;Reverse&nbsp;domain&nbsp;zone&nbsp;&gt;---------------------------------------&nbsp;<BR>Mar&nbsp;30&nbsp;13:36:00&nbsp;ns&nbsp;named[3544]:&nbsp;Lame&nbsp;server&nbsp;on&nbsp;'32.142.192.192.in-addr.arpa'&nbsp;(in&nbsp;'142.192.192.IN-ADDR.ARPA'?):&nbsp;[140.128.153.1].53&nbsp;'vghtc.vghtc.gov.tw':&nbsp;learnt&nbsp;(A=168.95.1.1,NS=140.111.1.2)&nbsp;<BR>Mar&nbsp;30&nbsp;13:36:39&nbsp;ns&nbsp;named[3544]:&nbsp;Lame&nbsp;server&nbsp;on&nbsp;'142.104.128.140.in-addr.arpa'&nbsp;(in&nbsp;'104.128.140.IN-ADDR.ARPA'?):&nbsp;[140.128.99.1].53&nbsp;'s867.thu.edu.tw':&nbsp;learnt&nbsp;(A=140.111.1.2,NS=140.111.1.2)&nbsp;<BR>============================================================================&nbsp;<BR>&nbsp;<BR>case&nbsp;1:&nbsp;关於&nbsp;forward&nbsp;domain&nbsp;zone&nbsp;&nbsp;<BR>-------&nbsp;<BR>以第&nbsp;1&nbsp;行错误讯息,&nbsp;为例:&nbsp;<BR>&nbsp;<BR>&nbsp;1)&nbsp;待查的&nbsp;domain&nbsp;name&nbsp;:&nbsp;&nbsp;<BR>	www.catv.com.tw&nbsp;<BR>&nbsp;<BR>&nbsp;2)&nbsp;理论上,&nbsp;catv.com.tw&nbsp;的负责&nbsp;DNS&nbsp;server&nbsp;:&nbsp;(&nbsp;one&nbsp;of&nbsp;the&nbsp;many&nbsp;DNS&nbsp;hosts)&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;--&nbsp;catv.com.tw&nbsp;的&nbsp;NS&nbsp;记录,&nbsp;所指到的&nbsp;DNS&nbsp;host&nbsp;&nbsp;<BR>	igndns.gcn.net.tw&nbsp;(&nbsp;203.67.199.1&nbsp;)&nbsp;<BR>&nbsp;<BR>&nbsp;3)&nbsp;送出这次&nbsp;query&nbsp;(www.catv.com.tw)&nbsp;的&nbsp;DNS&nbsp;server:&nbsp;<BR>	A=203.66.2.199&nbsp;<BR>&nbsp;<BR>&nbsp;4)&nbsp;负责&nbsp;catv.com.tw&nbsp;的&nbsp;NS&nbsp;记录的上一层&nbsp;(&nbsp;com.tw)&nbsp;的&nbsp;DNS&nbsp;server&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;--&nbsp;com.tw&nbsp;的&nbsp;NS&nbsp;记录,&nbsp;所指到的&nbsp;DNS&nbsp;host&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NS=140.92.1.50&nbsp;(aladdin.iii.org.tw)&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;目前,&nbsp;另一个负责&nbsp;com.tw&nbsp;的&nbsp;DNS&nbsp;server&nbsp;为&nbsp;moevax.edu.tw&nbsp;<BR>&nbsp;<BR>How&nbsp;to&nbsp;fix:&nbsp;<BR>---------&nbsp;<BR>至於,&nbsp;出现这个问题的成因.&nbsp;通常是&nbsp;&nbsp;(2)&nbsp;和&nbsp;(4)&nbsp;的&nbsp;DNS&nbsp;servers&nbsp;设定不配合,&nbsp;<BR>除了少数的情况,&nbsp;一般的情况下是&nbsp;(2)&nbsp;的&nbsp;DNS&nbsp;管理者,&nbsp;有管理上的疏失.&nbsp;<BR>&nbsp;<BR>因此,&nbsp;必须通知该&nbsp;domain&nbsp;zone&nbsp;的管理者,&nbsp;加以更正.&nbsp;<BR>&nbsp;<BR>Note:&nbsp;<BR>&nbsp;&nbsp;更遭的情形是,&nbsp;(2)&nbsp;的管理者(or&nbsp;相关单位),&nbsp;对&nbsp;DNS&nbsp;server&nbsp;的运作,&nbsp;<BR>&nbsp;&nbsp;不够了解,&nbsp;加上系统上所用的&nbsp;DNS&nbsp;server&nbsp;(named)&nbsp;程式过於老旧,&nbsp;以致&nbsp;<BR>&nbsp;&nbsp;设定造成错误,&nbsp;还不知道.&nbsp;误己误人.&nbsp;<BR>=============================================================================&nbsp;<BR>&nbsp;<BR>case&nbsp;2:&nbsp;关於&nbsp;reverse&nbsp;domain&nbsp;zone&nbsp;的讯息&nbsp;<BR>-------&nbsp;<BR>以第&nbsp;3&nbsp;行错误讯息,&nbsp;为例:&nbsp;<BR>&nbsp;<BR>&nbsp;1)&nbsp;待查的&nbsp;domain&nbsp;name&nbsp;:&nbsp;&nbsp;<BR>	32.142.192.192.in-addr.arpa.&nbsp;<BR>&nbsp;<BR>&nbsp;2)&nbsp;理论上,&nbsp;142.192.192.in-addr.arpa&nbsp;的负责&nbsp;DNS&nbsp;server&nbsp;(之一)&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;--&nbsp;142.192.192.in-addr.arpa&nbsp;的&nbsp;NS&nbsp;记录,&nbsp;所指到的&nbsp;DNS&nbsp;host&nbsp;&nbsp;<BR>	vghtc.vghtc.gov.tw&nbsp;(140.128.153.1)&nbsp;<BR>&nbsp;<BR>&nbsp;3)&nbsp;送出这次&nbsp;query(32.142.192.192.in-addr.arpa)&nbsp;的&nbsp;DNS&nbsp;server:&nbsp;<BR>	A=168.95.1.1&nbsp;<BR>&nbsp;<BR>&nbsp;4)&nbsp;负责&nbsp;142.192.192.in-addr.arpa&nbsp;的&nbsp;NS&nbsp;记录的上一层的&nbsp;DNS&nbsp;server&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;--&nbsp;192.192.in-addr.arpa&nbsp;的&nbsp;NS&nbsp;记录,&nbsp;所指到的&nbsp;DNS&nbsp;host&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NS=140.111.1.2&nbsp;(moevax.edu.tw)&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;目前,&nbsp;另一个负责&nbsp;com.tw&nbsp;的&nbsp;DNS&nbsp;server&nbsp;为&nbsp;moevax.edu.tw&nbsp;<BR>&nbsp;<BR>--&nbsp;&nbsp;<BR>Joe.&nbsp;C.S.Chen,&nbsp;&nbsp;<A HREF="mailto:chen@cc.nctu.edu.tw">chen@cc.nctu.edu.tw</A>&nbsp;<BR>&nbsp;<BR>*******&nbsp;&nbsp;Knowledge&nbsp;is&nbsp;of&nbsp;two&nbsp;kinds.&nbsp;&nbsp;We&nbsp;know&nbsp;a&nbsp;subject&nbsp;ourselves,&nbsp;&nbsp;********&nbsp;<BR>&nbsp;	&nbsp;or&nbsp;we&nbsp;know&nbsp;where&nbsp;we&nbsp;can&nbsp;find&nbsp;information&nbsp;upon&nbsp;it.&nbsp;<BR>&nbsp;<BR><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER></BODY></HTML>

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