1. Technical Implementation for Chinese domain name
TWNIC Feb

2. Technical solution Server side Client side DNS-Bind 8.2.3
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)

3. C-Bind Bind8.2.3 8-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

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

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

6. 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

7. DNS Gateway 2 .台灣 (UTF8/Big5) DNS 6 4 5 1 7 教育部.台灣 (Big5)
Winmdow 2000 user

8. 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

9. Chinese E-mail 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

10. 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

11. 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

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

13. 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

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

15. 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

16. 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

17. 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