????? ???? ?????? ????? DNS ?? ????? ????? ???????? ?? ?????? ????:

"??? ???? ??? ?????? ??? ??? ?? ???? DNS ??? ?? ????."

???? ????? ??? ???????? ?? ???? ?? ??????? ?????? ?????? ????????? ???????? ??????? ?????? ????? ??? ????????.

?? ??? ????? DNS ??? ????? ?? ???? ???? ??? ????????. ?? ???? ?? ???? ???? ?? ?? ???? ?? ???? ???. ??? ?????? ???? ????? ???? ??????? ??????? ?????? ?????? ?? ??? ?????? ??????? ?????? ??? ??? ???? ??????? DNS ?? ?? ??????? ??????.

????? "???? ???" ???? ????? ??????

???? ????? ???????? ??????????? ?????? ???????? ?????? ????? DNS ?????? ?????? ??????. ??? ????:

• ????? ?? ?? ???? ?????? ?????? DNS ?????

• ???? ???????? ????? ?? ?? ???? ????? ????? ????? ?? ????? ????

• ?????? ??? ?? ??? ????? ?? ??? ????? ?????? ??????

????????? ?????? ?????? ?? ???? ?????? DNS ???????.

?? ????? ????? ?????? DNS

??? ????? ??????? DNS ?????? ??? ??? ???????:

• ????? (??????? ?????? ??????)

• ???? ??????? ?? ?????? ?????? ??

• ????? DNS ??????? ????? ???????? ????? ??

• ???????? ?????? ??? ??????

?? ????? ???? ????? ???? TTL (??? ??????) ?????. ??? ????? ?????? ??? ???TTL? ?????? ??? ??????? ?? ????? ????? ??????.

???? ????? ?? ???? ??????? DNS:

• ????? ?? ???? ??

• ????? ?? ???? ????

• ??? ??????? ???? ???? ????????

??? ?????? ?????? ?? ??????? DNS (?? ???? ??????)

1. ?????? ????? ???? DNS ?????? ??????? (???? ??)

??????? ?????? ??????? ?????? ?? ??????? DNS ?? ??? ??????? ?? ????? ??????? ?????? ?? ????? ????.

????? ?????? ??????? DNS:

1)?DNSChecker – ???? ????? DNS ?? ???? ?? 100 ???? ?????

https://dnschecker.org/

2)?WhatsMyDNS – ????? ????? ??????? DNS ??? ?????

https://whatsmydns.me/

3)?NSLookup.io DNS Checker – ???? ???? ????? ???????

https://www.nslookup.io/dns-checker/

4)?Site24x7 DNS Propagation Checker

https://www.site24x7.com/tools/dns-propagation.html

?????? ??? ??????? ??? ??????? ??? ?????? ?????? ?????:?

? ??? ????? DNS ???? ???????? ???? ?????? ????

2. ?????? ????? ??? ??????? (?????? ???????)

???? ????? ??? ??????? ????? ????????? ?????? ??? ?????? DNS ?????.

dig (?????? ???? ?????????? ?????????)
? ?dig example.com
????? ????? ????????? ?????? ??? DNS ????? ?? Google:
? ?dig @8.8.8.8 example.com

nslookup (???????? ?????????)

? ?nslookup example.com
????????? ?? ???? ????:
nginx
nslookup example.com 8.8.8.8

????? ???Ping ??? ?????? DNS ???????

????? ?????? ?? ?????????? ??? ping? ???? ??? ?? ???? ????:

• ?? ?????? Ping ?????? IP ????? ??????

• ?? ???? ??????? ??????? ???????? ICMP

• ?? ???? ?? DNS ??? ??????? ???????

???? Ping ????????? ???? ?????? DNS.

3. ????? ?? ????? ??????

??? ????? ????? ????? DNS ??:

• ?????? ?????? ??????? ????? ????? ??? ???????

• ???? ?????? ????? ?????? ??????

• ???? ????? ?????? ?????? ?????????? (VPN) ?? ????? ????

?????? ?? ?????? ??????? ???????? ????? DNS ????? ??????? ??? ???? ?? ??? ??? ???????? ???????.

?:?????? ??? IP ??????? ????? ??? ??? ??? ???????

??? ???? DNS ????? ??? ?? ??????? ????? ??????? ?????? ???. ??????? DNS ???? ??????? ???????.

?:??? ?? ????? ?????? ??????? DNS?

????? ???? ????????? ???? 24–48 ????? ??? ??? ???????? ?? ?????? ????? ???? ??? ???? TTL.

?:??? ?? TTL ?????? ?? ????

TTL (??? ??????) ????? ?? ??? ????? ????? DNS ??????.

• TTL ????? = ??????? ???? ??????? ????

• TTL ????? = ??????? ????? ????????? ??????

??????? ???????? ????? TTL ?????? ???? ?? ???? ?? ??? ??????.

????? ??????? ?????? ??????? ???? ????? ????? DNS. ?? ???? DNS ?? ???? ?????? ?????? ???:

• ????? ???? ???????

• ????? ??????

• ????? ???? ????????

???? ????? ??????? ???????? ?????? ??????.

• ?????? ???? ?? ??????? DNS ?? ??? ????? ???????

• ?? ????? ??? ???? ???? ?? ????? ????

• ?????? ????? ?????? ??????? DNS

• ???? TTL ??? ????? ??????? ?? ???????

• ???? ???? ??????? ????? ???? ????? ????????

???? ??????:
?? ???? ???? DNS ????? ??? ?????? ???? ???? ???.

?????? ?? ???? ????? DNS ???? ??????? ??? ?? ???? ?????. ?? ???? ???????? ??????? ???? ??????? ??????? ?? ??????? ??????? ???????.

?? ???? ?????? ?? ??????? DNS ???????? ???? ???? ????????? ???????? ??????? ???????? ????? ???? ????????? ???????? ?????? ??? ???? ??????? ???? ????? ????? ??? ????????.

????? ?? ???? ????? ?? ICANN

???????? ???? ????? ?? ICANN? Nicenic ????? ????????? ?????? ?????????? ???? ????? ????????. ?? ????? ????? ??????? ??????? ??????? ??? ????? ?????? ??????? ??? ???????? ??????? ???? ???? ???.

??? Nicenic ????? ????? ???????? ???????? ????????? ????? ??????? ???????? ?? ???? ????? ??????.