Subject: [DNS] reverse domain ªº¨Ï¥Î®É¾÷ (long)
ºKn»¡©ú:
- ¥Ñ IP addr. §ä¨Ï¥Î³æ¦ì
- reverse DNS ¨t²Îªº¨Ï¥Î®É¾÷
- DNS Caching ( positive & negative caching )
- ¹ï SPAM (e-mail, usenet), ¤@¯ëºÞ²zªÌ¸Ó¦³ªº»{ª¾»P°t¦X±¹¬I
Path: netnews.NCTU.edu.tw!news2!not-for-mail
From: cschen@cc.nctu.edu.tw (C.S.Chen)
Newsgroups: tw.bbs.config,tw.bbs.comp.network,tw.bbs.comp.unix
Subject: [DNS] reverse domain ªº¨Ï¥Î®É¾÷ (long)
Date: 5 Jun 1997 09:18:16 GMT
Organization: National Chiao Tung University, Hsinchu, Taiwan
Lines: 295
Message-ID: <5n608o$ee2$1@news2.nctu.edu.tw>
NNTP-Posting-Host: localhost
Keywords: reverse, forward, DNS
X-Newsreader: TIN [UNIX 1.3 950824BETA+ANSI+COLOR PL8]
Xref: netnews.NCTU.edu.tw tw.bbs.config:8595 tw.bbs.comp.network:47247 tw.bbs.comp.unix:42289
[DNS] reverse domain ªº¨Ï¥Î®É¾÷
================================
³\¦h¤H¹ï DNS ªº¹B§@, ³q±`¬O¤@ª¾¥b¸Ñ. §Y¨Ï¬O¬ÛÃö¨t²Îªº¹ê»Út³d¤H,
¹ï¾ãÓ¨t²Î, ¦³®ÉÔ, ÁÙ¬O¦³¤@¨Ç¦ü¬O¦Ó«DªºÆ[©À.
¬Æ¦Ü, ÁÙ¦³¨Ç³æ¦ìªººÞ²zªÌ, »¡¬O°ò©ó security ªº¦Ò¶q, ©Ò¥H¤£³] forward
and/or reverse domain name ªº database.
¤jÅé¤W, ¤£ºÞ¬O¤@¯ë¨Ï¥ÎªÌ, ©Î¨t²ÎºÞ²zû, «Ü¦h¤H³£¤F¸Ñ forward domain zone,
ªº«n»P¥Îªk. ³oùØ, ¤£¥´ºâ¦h»¡.
¦ý¬O reverse domain name ªº database, ¦b°ê¤º, ¨´¤µÁÙ¤@ª½¨S¦³±o¨ìÀ³¦³ªº«µø.
-- ³\¦h¤H, ¥i¯à¨S¦³¹Á¹L³Q ftp.uu.net µ¥°ê»ÚµÛ¦W¯¸¥x, access deny ªº¸gÅç...
±µ¤U¨Ó, 7/1 ¤é, ¤]³\¦³¤H·|¦³¾÷·|¨£ÃѤ@¤U, °ê¤º¯¸¥xªºÁp¦X access deny
¬¡°Ê...
°ÝÃDI´º»¡©ú
============
¥Ø«eªº Internet, SPAM (email spam, usenet spam, ...) ªº±¡ªp. ¬Û·í´¶¹M
¦³¨Ç¦a¤è, ¦¤w¸g¬O´c¦W¬L¹ü.
¹ï¥I³oÃþªº SPAM, ¬Æ¦Ü cracker ¦æ¬°, ¤è¦¡«Ü¦h. ²z½×¤W, ¨CÓºô¯¸, ³£¥i¯à
¸I¤W©Î¥X²{³oÃþÃaF. ¦]¦¹, ¤jÅé¤W, ¦U³æ¦ìºÞ²zªÌ, °ò¥»¤W³£¬O¹ï³oºØ¨Æ±¡,
¬O¥H¤¬¬ÛÀ°¦£¬°«e´£. ¦ý¬O¹ê»Úªº case, ±`·|¦]¬°¦³¥»³æ¦ìªº¨Ï¥ÎªÌñ¯A¦b¤º,
³q±`³B²z¤W, ³£·|ÂàÁÍ«O¦u, ¤ñ¸û¤p¤ß¶È·V.
°ò¥»¤W, ¥X°ÝÃD®É, ¥Ñºô¸ô¤W¨ä¥L³æ¦ì, ¨Ó¬Ý¬Y¤@Ó³æ¦ìºô¸ôºÞ²z, °µ±o¦n¤£¦n
ªº´XÓ, ±`¨£°_½Xn¨D:
1) ¸Ó³æ¦ìªº reverse DNS ¨t²Î, µn¿ý¬O§_§¹¾ã.
2) "postmaster@your-domain-zone", "abuse@your-domain-zone"
µ¥ e-mail addr. ·|¤£·| work.
3) mail ±H¹L¥h, ¦³¨S¦³¦^À³, ¤Î¬ÛÃö³B²z.
¦pªG³oÃþªº¸ê®Æµn¿ý, or contact person ¨S¦³. ©ÎªÌ, e-mail response ¨S¦³,
½Ñ¦p¦¹Ãþ, ¥i¯àÅý¤H·|¦³¦nªºÆ[·P¶Ü ?
¦pªG, µy°µÀ˵ø. °ê¤ºªººô¯¸, TANet, HiNet, SeedNet, ... µ¥µ¥, ³\¦hºô¯¸
³o¤è±³£¨S¦³°µ±o«Ü¦n.
§Ú̬ݨƱ¡, ³q±`³£À³¸Ó¬Ý, ¾ãÅ骺ªí²{.
¨Æ±¡¬°¤°»ò¬O²{¦b³oӼˤl, ³q±`³£¬O¦³ì¦]ªº, ¨ä¨Ó¦³¦Û. ¨ì³Ì«á, ¤£¥~¥G
´N¬O¤@Ó, ¤Hªº¦]¯À. ¨Æ¦b¤H¬°(¥i¤£¬O¹q¸£µ{¦¡¥i¥H¨M©w), ³o¨ÇºÞ²zªÌ, Æ[©À
§Ë³q¤F, ³Ñ¤Uªº, ´N¦n¿ì¤F.
³Ìªñ, ¦]¬°¦³¤@Ó DES ªº±K½X, ¦@¦P§ä key ªº¬¡°Ê, ±È°_¤F, ³\¦h¤Hª`·N¨ì,
reverse DNS ¦WºÙ¦b³\¦hºô¸ô¨Ï¥Î, ²Îp³øªíªº¤è«K»P·N¸q.
-- ¥t¤@Ó, ·ç¤h¬¥°ÓºÞ²z¾Ç°|ªº¹¸ª§¤O³ø§i, ¤]Åã¥Ü»OÆWªººô¯¸, µn¿ý¸ê®Æ,
¦ü¥G´Ý¯Ê«Ü¦h.
--¹³³o¼Ë, §Ṳ́̾°»ò¥h¸ò APNIC ª§¨ú§ó¦hªº¥i¥Î IP address.
¨ä¹ê, §ó¿n·¥¦a»¡, reverse domain name ªºµn°O, ÁÙ¥i¥HÀ°¦£°µ«Ü¦h¨Æ±¡.
* scecurity,
* ¤è«K access control
* ¤è«K load balancing µ¥³]©w.
©³¤U, ´N°w¹ï security µ¥¤è±, µy¬°°µ©µ¥Ó»¡©ú.
============================================
³Ìªñ, SeedNet ¤è±, ¶}©l¿n·¥¦^À³³o¤è±ªºªF¦è, ¹ïºô¤Í¦Ó¨¥, ºâ¬O¦n¨Æ¤@¥ó.
-- ¤£¹L, §Þ³N¤W, ³\¦h¦a¤è, ÁÙ¬O¥b¥Í¤£¼ô.
( ¤]³\¬O, ºÞ²zªÌÂà¤â¹L¦hªº«áºÃ¯g¤§¤@§a )
©³¤Uªº¤@Ó¨Ò¤l, »¡©ú¤@¤U, ¤@Ó reverse DNS ³]©wªº¬ÛÃö³]©w, »P DNS
¨t²Î, ©M¨ä¥¦ AP ªº¤¬°ÊÃö«Y.
Maggie Liang (liang@mozart.seed.net.tw) ´£¨ì:
: kftseng.bbs@bbs.ccu.edu.tw (ù¶³¡E¯ëY) wrote:
: > ½Ðt³d seednet dialup domain ªººÞ²zªÌª`·N¤@¤U.
:
: ¥i§_ª¾¹D¬O¤°»ò°ÝÃD©O¡H
:
: >Jun 1 10:30:35 ccnews nnrpd[16950]:
: > gethostbyaddr: s26-49.dialup.seed.net.tw != 139.175.26.49
³oºØ°T®§©Òªí¥Üªº·N¸q. ¬O¥¿¤Ï¸Ñ domain name ¤£¤@Pªº±¡ªp.
³\¦hªº AP, ¦bµo²{¨âªÌ¦³¥X¤J®É, ´N·|±N³o¨Ç¸ê°T°O¿ý¤U¨Ó.
-- ¥]¬A IP addr ©M forward domain name.
²{¦bªº AP,( ¦p sendmail, news, ftp, rlogin, tcp wrapper, ...), ³]p®É,
¤j·§³£¬O³o¼Ë°µ.
-------------------------------------------------------------------
1) ±µ¦¬¨ì¤@Ó IP addr. A ªº connection »Ý¨D, ©ó¬O³z¹L reverse DNS ¥h
§ä¥X¤@Ó¹ïÀ³ªº forward domain name B. ¦pªG§ä¤£¨ì, ´N°±¤î.
* ©ó¬O, ºÞ²zªÌ, ´N¥i¥Hµ´©w, ¶i¦æ access deny, :-) !
2) ®Ú¾Ú¨BÆJ 1) ©Ò§ä¨ì¥¿¸Ñ domain name B, ¥h forward DNS "¬dÃÒ", ¨ú±o
¤@²Õ IP addr. C ( ¥i¯à¬°¤@Ó, or ¨âÓ¥H¤W, ¦p multi-homed host,
±`¨£±o¹³ router ).
3) ¤ñ¹ï IP addr. A, ¬O§_¥]¬A¦b IP addr. C ¤¤.
-- ¦pªG¤£¹ï, «h¨t²Î·|´£¥Xĵ§i. ²£¥Í¦p¤Wzªº°T®§.
³o®ÉÔ©Ò¥Nªíªº·N¸q, ¤]³\¬O database ¦³»~. ¥t¥~¤@ºØ¥i¯à, ´N¬O³y°².
¦³®ÉÔ, ¤@Ó³æ¦ì©Ò¦bªº forward & reverse domain zone, DNS µù¥U,
¤Î¸ê®ÆºûÅ@, ¤ÀÄݤ£¦P³æ¦ì, ¦³®É«á·|²£¥Í, °µ·~¤£¤p¤ß, ¤]·|²£¥Í³oÃþ±¡ªp.
-------------------------------------------------------------------
´XÓ°ÝÃD:
========
°w¹ï¤W±ªº±¡ªp, §ÚÌ¥i¯à·|²£¥Í³\¦h°ÝÃD.
Q1: ¨t²Î¬°¤°»òn³o»ò³Â·Ð ? ¨BÆJ 1). °µ§¹«á, ¤£´N¥i¥H¤F.
A: ¦h°µ 2) ©M 3), ¤@¤è±¬O¬°¤F security ¤Wªº¦Ò¶q. Á`¬On§ó¾¨·V¨Ç, ÁקK
¦³¤@¨Ç³æ¦ì, J¶Ã³]³], µM«á²£¥Í¤@·²¶Ã¤C¤KÁV°T®§, »{·N«üÃÒ. ©Î³´®`¥L¤H.
¥t¥~¤@¨Ç¿n·¥ªº·N¸q, ¬O¦³§Q access control. ¤è«K load balance ºÞ²zµ¥.
Á|¨Ò:
139.75.26.49, 192.72.90.129 ·Ó¥Ø«e³£¬O SeedNet ªº¥Î ¤á IP.
¤ñ¸û *.seed.net.tw, þ¤@ºØ¤ñ¸û®e©ö¿ë»{. ¥unµy¬°·Q¤@¤U,
´N¤£Ãø©úÁA.
ºô¸ô¤Wªº traffic. ³£¬O¥H IP addr. ªº¸ê°T¦b¬y³q, ¨ì¥Øªº¦a«á, ¦pªG¤v
¤èªº reverse DNS ¸ê®Æ, ¨Sµn¿ý, ¨º»ò¹ï¤è³\¦h AP ¦b§@ access control,
performance tuning ®É, ±NÅܱo«D±`§xÃø.
¤×¨ä, ³\¦h³æ¦ì³£¬O¤£³sÄòªº class C, IP address. ¦b¤À¿ë®É´N§ó§xÃø¤F.
-----------------------------------------------------------------------
Q2: ¤£³] reverse DNS, ¥u¦³ forward domain name, ¤£¬O¤ñ¸û¬Ù¨Æ. ¬Ý¨Ó traffic
¸û¤Ö, ³s 2), 3) ³£¤£¥Î¤F ?
A: ¨Æ±¡¤£¬O³o¼Ëªº.
·í§A©Ò¥Îªº DNS server NS1, ²Ä 1 ¦¸¶]°_¨Ó, ³Q¨ä¥¦µ{¦¡, query ¨ì¬Y¤@
µ§¨ä¥¦ domain zone ªº entry ®É, ( ¤£½× forward & reverse domain ),
³o®É«á, NS1 ³£¤£·|¦³ answer (data), ©ó¬O³oÓ NS1 , «K·|³z¹L¥¿±`Åé¨t,
±q root ³Ì¤W¼hªº¬Y¤@Ó DNS server (e.g. NS2) °Ý°_, ¤@¸ô§ä¤U¨Ó, §ä¨ì¸
t³d¸Ó domain zone ªº¬Y¤@Ó DNS server (e.g NS3). µM«á, NS1 ±N query
¥æµ¹ NS3, NS3 §ä¤F¦Û¤vªº database ( ¦s¦b memory ¤¤, ²z·Qª¬ºA ), ¦p
ªG¦³³oµ§¸ê®Æ, ´N±N¸Ó answer, ¥æµ¹ NS1. ±µ¤U¨Ó, NS1 ´N±N³oÓ answer,
°O¤U¨Ó. ( ¥H¤Uªº NS3 ¦Æ«ü, t³d¬Y domain zone ªº DNS server ¤§¤@)
¦]¬°¦³ caching, ¦pªG¸òµÛ¦³¤H(µ{¦¡)¦A°Ý, NS1 ´N¥i¥H°¨¤W±Nµª®×¦^µ¹¥¦.
¦ý¬O¦pªG, NS3 §i¶D NS1, ¨S¦³³oµ§ query ªº¹ïÀ³°O¿ý. ¨º»ò NS1, ±µ¤U¨Ó
·|«ç»ò°µ ?
¦pªG NS1 ¬O, ¦´Áªº BIND ( 4.9.5 or ¥H¤U), ±µ¤U¨Ó¦pªG¦³¤H¦A°Ý¨ì¦P¼Ë
ªº¤@µ§ entry, ¥L¤S·|¦A°Ý NS3 (or ¨ä¥¦¦P¼Ët³dªº DNS server) ¤@¦¸.
( ³o¤@¦¸, ¦]¬°¦³ caching, ¥¦ª¾¹Dª½±µ°Ý NS3 or equivalent ), ¦ý¬O«Ü
¥i¯àÁÙ¬O¨S¦³µª®×.
´N³o¼Ë, ³oÃþ NS1 --> NS3, NS3 --> NS1 ªº¬G¨Æ, ¤£Â_ªº¤Wºt.
¤ñ¸û·sª©ªº BIND 8.1 ( 4.9.5-P1, ³o³¡¥÷ªº¥\¯àÁÙ¤£¬O«Ü»ô). ¸I¨ì¤Wz
ªº±¡ªp, ·|¦³ negative caching ªº°Ê§@. ¤]´N¬O, ·í NS3 §i¶D NS1, ¬Y
¤@µ§ query, ¨S¦³¹ïÀ³ªº DNS data entry ®É, NS1 ·|±N³oÓµ²ªG, °O°_¨Ó.
¦b 10 ¤ÀÄÁ¤º ( 600 sec), ¦pªG¦³µ{¦¡. °Ý NS1 ¦P¼Ëªº query, ¥¦°¨¤W´N
§i¶D¥¦, ³oÓ¸ê®Æ, ¤£¦s¦b.
600 ¬í¹L¥h, ·í¦³µ{¦¡, ¦A°Ý¦P¼Ëªº query ®É, ³o®É«á, NS1 ·|¦A¥h°Ý NS3.
¦p¦¹, ¤£Â_«ºt. ( ³o®É«á, ´N¥i¥H¤F¸Ñ, ¦³»PµLªº®t§O )
¥t¤@¤è±, ·í NS3 ¨M©w, ±N¬Yµ§¸ê®Æ¥[¤J®É, ( e.g ¥ý«e¤£¦s¦bªº entry),
·í NS1 ¤U¦¸¦A¨Ó°Ý®É, «K¥i¥Hµo²{¨ì.
¦]¬°¦³ caching, ¤j®a³q±`¤]³z¹L local ªº DNS server ¦b¾Þ§@ AP, ¦]¦¹,
¹ï©ó¦³¥¿¤Ï¸Ñ¨t²Î. ³]©w¥¿±`ªº¨t²Î, ¾ãÅé¦Ó¨¥, §Y¨Ï°µ§¹¤Wzªº¤T¹D°Ê§@,
¦]¬°, ³q±`³£¯à¦b local DNS cache ¤¤§ä¨ìµª®×. ¥H¦¹, ³£¤ñ¨ì remote site,
¥h¶i¦æ«ÂФ£Â_ªº query °Ê§@, ®É¶¡¤W¤]¬Ù«Ü¦h.
-- ¨ì remote site ªº DNS traffic, ¥H¤Î¦b remote site DNS server,
±Æ¶¤µ¥ query ³B²zµ²ªGªº±¡ªp, ¤]±N¤j´T´î¤Ö.
¯à¤£¯à´î¤Ö³o¨Ç remote query traffic ? ¥i¥H, ¥un¸Ó remote site ªº
DNS ºÞ²zªÌ, ±N reverse DNS database ¸É»ô, ³o¼Ë¤@¨Ó, ¥ô¦ó±q¸Ó³æ¦ì³s
¹L¨Óªº traffic, ¥»¦aªº¾÷¾¹, ¸g¥Ñ DNS ¬d¸ß, «Ü§Ö¦a´N¥i¥H¦b caching
¤¤§ä¨ìµª®×, ³s½u«Ü§Ö¦a«Ø¥ß°_¨Ó. ¨ä¥¦ªº AP À³¥Î, run °_¨Ó¤]·| smooth
«Ü¦h. ( ¤£»Ý®ö¶O¤Ó¦h®É¶¡©ó DNS query loop ªºµ¥«Ý¤¤ )
local site n°µ access control, load balaning ½Õ¾ã, ¤]¤ñ¸û¤è«K¦h¤F.
---------------------------------------------------------------------
Q3: ¥t¤@Ó¤p°ÝÃD, ³o¼Ë§ä¨ìªº answer, postive caching, ¨ì©³·|¦s¦h¤[ ?
A: ³oµ§ entry, ¨s³º¦b NS1 ¤¤, caching ¦h¤[. °ò¥»¤W, ¥Ñ ì¸ê®Æ´£¨ÑªÌ,
NS3 ³]©w. ( ¦p SeedNet ªº¨Ò¤l, ³] 4 ¤Ñ )
-- ¦ý¬O, ÀHµÛ named ¶V¶]¶V¤[, ¦]¬° caching ªºÃö«Y, ³q±`µ{¦¡·|¥ýºCºC
Åܤj, ¤j·§ 7 ¤Ñ¤§«á, named ªº size ´N·| stable ¤U¨Ó.
¬°¤°»ò¬O³o¼Ë ? ³oùئ³´XÓ«eÃD.
1) ·|¨Ï¥Î³oÓ DNS server ( NS1) ªº traffic, ¦b¤@¬q´Á¶¡¤º, ¤H¼ÆÀ³¸Ó
¤£·|¬ðµM¼W¥[©Î´î¤Ö¤Ó¦h. ( °£«D network upgrade, or DOWN, ...)
2) BIND named, °£¤F¦Û¤v©ÒºÞÁÒªº domain zone ªº data, ¥ô¦ó data entry
¤£·|«O¯d¶W¹L 7 ¤Ñ, ®É¶¡¨ì¤F, ´N purge ±¼, ÁקK named ¤@ª½µÈ, ³Ì
«á¦Y¥ú¦h¼Æªº memory. ¤Ï¦Ó¼vÅT¾ãÅé performance.
( ¦h¼Æªº¤H, default Time-To-Live ³£¬O³] 1-3 ¤Ñ )
-------------------------------------------------------------------------
Q4: ¦³¤@¨Çºô¯¸, "¾á¤ß»¡", ¦pªG¦³³]¤Ï¸Ñ, ³o¨Ç DNS ªº¸ê®Æ, ¥i¯à³Q¬Y¨Ç¯¸¥x,
³z¹L¤@¨Ç©Ç²§ªº DNS server, °²³y¸ê®Æ. ®µ«è³ø´_, ¦¾¿à, ÄÌÂZ, ...µ¥.
¥u¦³ IP address log, ¬O¥i¥H«H¿àªº.
A: ³o¹ê¦b, Å¥°_¨Ó«Ü©_©Çªº»¡ªk. ¦pªG, ¦³¤F¸Ñ¤Wzªº¬yµ{, ´NÀ³¸Ó¤£Ãø©ú¥Õ.
DNS ¬O¶¥¼h¦¡¤À´²¨t²Î, n³y°², ¥²¶·Åýµ{¦¡, ³q¥]. ¥]¬A¦UÓ¤£¦P domain
zone, ©Ò¿×ªº forward, reverse domain, ¨C¤@¼h³£n, ³s³Ì¤W¼hªº root
domain name server ³£n¶].
³o®Ú¥»´N¬O AP ¥»¨ªº°ÝÃD, ©~µM©Ç¸o DNS ¨t²Î ???
¯u¬O³o¼Ë, Ãø¹D IP addr. log, ´N¤£¥i¥H§ï¶Ü ????
Á¿ÃøÅ¥ÂI, °µ³o¨Ç, ÁÙ¤£¦pª½±µ¥Î editor ( vi, joe, emacs, ...) ª½±µ
½s¤@½sÁÙ¤ñ¸û§Ö.
³o¤@Ó¨t²Î, n¸g¹L¤H®aªº check/verify. ¬°¤°»òn³o¼Ë§@ ?
-- ¦Y¹¡¶º¼µµÛ, ¶û®É¶¡¤Ó¦h ?
¨ä¹ê, ²{¦bªºAP ³]pÁͶÕ, ´N¬O©Ò¦³§ì¨ìªº, ¤£ºÞ¬O forward, reverse DNS
¸ê®Æ, ²Î²Î§ì¨ÓÀˬd. ( ·íµM, ·| log, «hªí¥Ü¦³ ¤£ match ªº°ÝÃD, )
´N¬Ý¬Ý©³¤U³oÓ e-mail (¼s§i«H) ªº header.
-- ©Ò¦³¸g¹Lªººô¯¸, IP addr. »P forward domain name ³£¦³µn¿ý.
-- earthink.net ¬Oºô¸ô¤Wªº, ´c¦W¬L¹ü, ²³¦hºô¯¸¦@¦Pªº©Úµ´©¹¨Ó¤á.
±M̳£¬OÅý¤H, ·F³oÃþÀݵo¤j¶q¼s§i e-mail, usenet articles ªº.
>From 07871706@earthlink.net Wed Jun 4 15:18:23 1997
Received: from NCTUCCCA.edu.tw (NCTUCCCA.edu.tw [140.111.1.10])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
by news2.nctu.edu.tw (8.8.5/8.8.5) with ESMTP id PAA17836
for ; Wed, 4 Jun 1997 15:18:22 +0800 (CST)
From: 07871706@earthlink.net
Received: from news.CNA.com.tw (news.CNA.com.tw [203.66.213.2]) by NCTUCCCA.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
edu.tw (8.8.5/8.8.0) with ESMTP id PAA19140 for ; Wed, 4 Jun 1997 15:14:44 +0800 (CST)
Received: from mtigwc03.worldnet.att.net (mailhost.worldnet.att.net) by news.CNA.com.tw with ESMTP
(1.37.109.16/16.2) id AA283237711; Wed, 4 Jun 1997 15:01:51 +0800
Received: from mailhost.worldnet.att.net ([207.116.57.134])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
by mtigwc03.worldnet.att.net (post.office MTA v2.0 0613 )
with SMTP id AJF9699; Wed, 4 Jun 1997 07:10:30 +0000
Received: from 123456@sprynet.com by sprynet.com (8.8.5/8.6.5) with SMTP id GAA00722 for ; Wed, 04 Jun 1997 02:31:55 -0600 (EST)
Date: Wed, 04 Jun 97 02:31:55 EST
To: ALLINTERNETUSERS@earthlink.net
Subject: Experience Incredible Mental States While Improving All Aspects of Your Mind!
Message-Id: <052897MM230A>
Reply-To: breakthru@rocketmail.com
X-Pmflags: 34078848 0
X-Uidl: 344434345512356874l4g7f5a5659k77
Comments: Authenticated sender is
Status: RO
Content-Length: 5264
Lines: 131
*********************************************************************
If you would like to be removed from "Source International
Marketings" #1 Breakthrough Alert Newsletter, then simply
[deleted]
======================================================
µ²»y:
====
SeedNet ¦ü¥G¤w¸g¿n·¥¦b°µ¤F. ¨ä¥¦ªº ISP ©O ? TANet ¦Û¤v ?
-- ³\¦h ISP ¤w¸g°µ±o¬Û·í¤£¿ù, ¦ý¬O§Ṳ́]±`±`µo²{, ÁÙ¬O¥t¦³¤£¤Ö,
¦b³o¤@¤è±, ¤´µM¬OµL°Ê©ó°J. ¬Ý¨Ó, ©Î³\¥u¦³¶D½Ñ¨Ï¥ÎªÌªºÀ£¤O, ¤~¥i¯à«µ®Ä.
©Ò¥H, ¥t¤@¤è±, ¦pªG§A©Ò¨Ï¥Îªº, ºô¸ô³s½u³æ¦ì, ÁÙ¨S¦³§¹¾ãªº reverse domain
µn°O, ³Â·Ð§A´£¿ô¤@¤U, ¬ÛÃöªº DNS ºÞ²zªÌ.
86/7/1 ¤é, ¥i¯à·|³°³°ÄòÄò, ¦³³\¦hµÛ¦Wªº BBS/NetNews/FTP, ...µ¥, Áp¦X©Úµ´,
¨S¦³ reverse DNS µnpªº¯¸¥x¤W¯¸. ¦pªG§AÁÙ·d¤£²M·¡, ¨ì®É«á, ¤é¤l¥i¯à±N·|
Åܱo¤£¤@¼Ë.
-- ¨ä¹ê, ¥unºÞ²zªÌ§Ë²M·¡, °µ¦n³o¥ó¨Æ, ¤@¯ë¨Ï¥ÎªÌ, À³·í¤£»Ýn¬°³o¤@¨Ç
ª¬ªp, ¦Ó·Ð´oªº.
--
Joe. C.S.Chen, cschen@ns.nctu.edu.tw
PS. Ãö©ó DNS ¬ÛÃöªº§Þ³N²Ó¸`, ¦³¿³½ìªÌ, ½Ð°Ñ¦Ò.
- RFC 1034, 1035, ... ( lots of )
- man named
- BIND BOG ( Basic Operating Guide )
usenet newsgroups:
comp.protocols.tcp-ip.domains
comp.protocols.dns.bind
comp.protocols.dns.std
comp.protocols.dns.ops