Technical Implementation for Chinese domain name TWNIC Feb

Technical solution Server side DNS-Bind Proxy server-Squid 2.3 Web server-Apache 1.3 Dns gateway Sendmail Client side download software for PC resolver(if need) client(Web mail)

C-Bind Bind bit Clean: strncasecmp function support 2 bytes code ( 2nd Byte case sensitive) hash function(2 bytes code 2nd Byte case sensitive) src/bin/named/db_lookup.c  nlookup() src/bin/named/db_glue.c  nhash() src/bin/named/ns_parseutil.c  symbol_hash() Read Correct Code range when read files src/lib/resolv/res_comp.c

CSquid(squid proxy server) Squid 2.3-stable3 Squid 2.3-stable4 support Chinese URL handle ’

CApache(apache web server) Apache Apache modify src/main/http_vhost.c Support Chinese URL Support Chinese virtual host

Why DNS Gateway TWNIC support these zone file(66) 台灣 (Big5 、 UTF8 、 GB 、 UTF8 、 UTF5) 商業、網路、組織、教育 (*5) 商業. 台灣、網路. 台灣、組織. 台灣、教育. 台 灣 (*5) 商業.TW 、網路.TW 、組織.TW 、教育.TW(*5).TW(*1) “. 中國 ” only UTF-8 encoding

DNS Gateway. 台灣 (UTF8/Big5) 教育部. 台灣 (Big5) DNS Winmdow 2000 user 網頁. 教育部. 台灣 (UTF8) 網頁. 教育部. 台灣 (Big5) 5 7

The function of DNS Gateway Combined with DNS On-line translate Can reply SOA and NS query (Change NS to itself under a domain) Support recursive query Follow root tree structure

Chinese address Sendmail or Exchange server follow RFC RFC821 、 RFC822( header 7 bits) RFC1034 、 RFC1035(only accept A-Z,a-z,0- 9,-) Most mail client can not support Chinese address

Mail use ’ as delimiter for username and hostname Some Chinese character second byte is ’ It don ’ t work unless the both side of mail server support Chinese address

Mail Server ‘ \ ’ It will be striped when the second byte of Chinese character is ‘ \ ’ ’ Some Chinese character will collision with the ’ of address Case sensitive in the second byte of Chinese character Chinese username

Web mail web mail can handle Chinese address web mail is independ with Chinese DNS web mail has some bugs in handle Chinese Character ‘ \ ’ ‘ | ’

Download client software Download is not necessary Replace winsock32.dll Change to ACE encoding for passthrough the firewall Support other encoding like clean 8-bit, UTF8 Can handle these TLD xxx.tw, xxx.cn xxx.( 台灣 ) big5, xxx.( 中國 ) big5 xxx.( 台灣 ) GBK, xxx.( 中國 ) GBK Can handle ‘ \ ’ Support http,telnet,ftp … Support Windows 95/98,NT,2000

Roaming Big5 Client Web proxy Roaming DNS Gateway DNS Web server (compatible to English domain name) Zone:ML Domain GB Web ML DNS query

Roaming It can pass through firewall without download client software On-line translate Traditional/Simplified Chinese domain name to query DNS server The web server is not require to support Chinese domain name It can support partial matching of domain name for selecting

Question Zone files have too many encoding type and hard to read It is difficult to ask system manager upgrade these AP to support Chinese handling Commercial proxy server 、 web server 、 firewall are still not support Chinese domain name Both side of Mail server must support Chinese domain name and Chinese username if user want to exchange mail with Chinese address

Question Browser will change URL encoding follow these web page encoding When the second byte of Chinese character is ’ or Chinese character like oxc4XX 、 0xd7XX,browser treat them with different meaning Microsoft have a patch to solve it Most mail clients can not accept address with Chinese character input