Dođite da zajedno provedemo slobodno vreme, da poslušamo neku dobru muziku, odgledamo neki dobar film, razmenimo mišljenja...
Pre svega treba da pokrenete DOS prompt. U tom prozoru otkucajte komandu NSLOOKUP, a zatim taster Enter (svejedno je da li koristite velika ili mala slova). NsLookup je skraćenica od "Name Servers Lookup", što u prevodu znači nešto kao "Pretraga DNS servera". Nakon što ste otkucali tu komandu i pritisnuli taster Enter, pokrenuće se program za rad sa DNS serverima. Ukoliko želite da vidite spisak svih komandi, prosto otkucajte upitnik i stisnite taster Enter:
> ?
Commands: (identifiers are shown in uppercase, [] means optional)
NAME - print info about the host/domain NAME using default server
NAME1 NAME2 - as above, but use NAME2 as server
help or ? - print info on common commands
set OPTION - set an option
all - print options, current server and host
[no]debug - print debugging information
[no]d2 - print exhaustive debugging information
[no]defname - append domain name to each query
[no]recurse - ask for recursive answer to query
[no]search - use domain search list
[no]vc - always use a virtual circuit
domain=NAME - set default domain name to NAME
srchlist=N1[/N2/.../N6] - set domain to N1 and search list to N1,N2, etc.
root=NAME - set root server to NAME
retry=X - set number of retries to X
timeout=X - set initial time-out interval to X seconds
type=X - set query type (ex. A,ANY,CNAME,MX,NS,PTR,SOA,SRV)
querytype=X - same as type
class=X - set query class (ex. IN (Internet), ANY)
[no]msxfr - use MS fast zone transfer
ixfrver=X - current version to use in IXFR transfer request
server NAME - set default server to NAME, using current default server
lserver NAME - set default server to NAME, using initial server
finger [USER] - finger the optional NAME at the current default host
root - set current default server to the root
ls [opt] DOMAIN [> FILE] - list addresses in DOMAIN (optional: output to FILE)
-a - list canonical names and aliases
-d - list all records
-t TYPE - list records of the given type (e.g. A,CNAME,MX,NS,PTR etc.)
view FILE - sort an 'ls' output file and view it with pg
exit - exit the program
Nama treba komanda kojom tražimo DNS servere za zadate provajdere. Dakle, treba da otkucate komandu set type=NS:
> set type=NSTime smo rekli programu da nas zanimaju NameServer (NS) upiti. Sledeće što treba da radimo je da prosto navodimo nazive provajdera, tj njihove domene i da stiskamo taster Enter. Npr. ukoliko želimo da saznamo sve dns servere provajdera Verat, treba da otkucamo verat.net i da pritisnemo taster Enter. Nakon toga, program treba da vam ispiše sve dns servere tog provajdera (nakon što uputi zahtev tom provajderu da mu dostavi listu dns servera):
> verat.net
Server: UnKnown
Address: x.x.x.x
Non-authoritative answer:
verat.net nameserver = dns6.verat.net
verat.net nameserver = dns3.verat.net
verat.net nameserver = dns2.verat.net
verat.net nameserver = dns1.verat.net
verat.net nameserver = dns5.verat.net
verat.net nameserver = dns4.verat.net
Dakle, sada znate kako možete sami saznati dns servere za bilo kog provajdera, tj. ispravno bi bilo reći dns servere bilo kog domena. Za vežbu, probajte npr. domene:
google.com verio.net eunet.rs ptt.rs sbb.rs telekom.rs neobee.net teamnet.rs itd.
Možda ćete želeti da pročitate i sledeći tekst kako da promenim dns server.
