{"id":2301,"date":"2019-01-10T10:27:32","date_gmt":"2019-01-10T09:27:32","guid":{"rendered":"https:\/\/www.websupport.sk\/podpora\/?post_type=ht_kb&p=2301"},"modified":"2025-02-18T16:35:03","modified_gmt":"2025-02-18T15:35:03","slug":"co-je-to-dns","status":"publish","type":"ht_kb","link":"https:\/\/www.websupport.sk\/podpora\/kb\/co-je-to-dns\/","title":{"rendered":"\u010co je to DNS"},"content":{"rendered":"\n\n\n

Syst\u00e9m DNS z\u00e1znamov<\/strong> sl\u00fa\u017ei na internete a na po\u010d\u00edta\u010dov\u00fdch sie\u0165ach na prekladanie dom\u00e9nov\u00fdch n\u00e1zvov na IP adresy<\/strong> a zabezpe\u010duje tak zjednodu\u0161enie komunik\u00e1cie<\/strong> a pohybu na internete. \u010casto je prirovn\u00e1van\u00fd k telef\u00f3nnemu zoznamu, prira\u010fuje toti\u017e IP adres\u00e1m slovn\u00fd (dom\u00e9nov\u00fd) n\u00e1zov.<\/p>\n\n\n\n

\n\n\n\n

Pou\u017e\u00edvate\u013e si v\u010faka DNS<\/strong> nemus\u00ed pam\u00e4ta\u0165 IP adresu<\/strong> str\u00e1nky, ale iba n\u00e1zov dom\u00e9ny. Syst\u00e9m DNS sa o navig\u00e1ciu postar\u00e1 za u\u017e\u00edvate\u013ea. Internetov\u00fd prehliada\u010d pri zadan\u00ed adresy str\u00e1nky zist\u00ed, na ktorom DNS serveri sa nach\u00e1dzaj\u00fa z\u00e1znamy pre konkr\u00e9tnu dom\u00e9nu a na DNS serveri zis\u0165uje IP adresy, ktor\u00e9 s\u00fa pre dom\u00e9nu nastaven\u00e9. DNS z\u00e1znam dom\u00e9ny obsahuje viacero typov z\u00e1znamov, z ktor\u00fdch ka\u017ed\u00fd m\u00e1 in\u00fa funkciu.<\/p>\n\n\n \t\t

\r\n \t\t\tUpozornenie: <\/span> \t\t\t \t\t\t\t

\r\n \t\t\t\t\tV pr\u00edpade zmeny DNS na in\u00e9ho poskytovate\u013ea je potrebn\u00e9 p\u00f4vodn\u00e9 DNS z\u00e1znamy odstr\u00e1ni\u0165 alebo prep\u00edsa\u0165 na nov\u00e9. Nie je mo\u017en\u00e9 ma\u0165 nastaven\u00e9 DNS z\u00e1znamy rovnakej kateg\u00f3rie na dvoch poskytovate\u013eov z\u00e1rove\u0148, \u010do by sp\u00f4sobilo nefunk\u010dnos\u0165 str\u00e1nky\/mailov.<\/p>\n

Nastavenie CNAME z\u00e1znamu pre www m\u00f4\u017ee by\u0165 blokovan\u00e9 chybovou hl\u00e1\u0161kou z d\u00f4vodu \u017ee u\u017e existuje DNS A alebo DNS AAAA z\u00e1znam pre adresu www. \t\t\t\t<\/p>\r\n \t\t\t \t\t\t\r\n \t\t<\/div>\r\n \t\t\n\n\n\n

Ak\u00e9 typy DNS z\u00e1znamov existuj\u00fa?<\/h2>\n\n\n\n

A z\u00e1znamy<\/h3>\n\n\n\n

DNS z\u00e1znam typu A sl\u00fa\u017ei pre nastavanie konkr\u00e9tnej IP adresy, z ktorej sa m\u00e1 na\u010d\u00edtava\u0165 obsah pre dan\u00fa adresu (dom\u00e9nu alebo subdom\u00e9nu). Pre ka\u017ed\u00fa subdom\u00e9nu je mo\u017en\u00e9 nastavi\u0165 \u013eubovo\u013en\u00fa IP adresu pod\u013ea potreby. IP adresu je nutn\u00e9 zada\u0165 vo form\u00e1te IPv4 (napr. 37.9.175.133). Pre IP adresu v tvare IPv6 pou\u017eite AAAA z\u00e1znam.<\/p>\n\n\n\n

Ako vyzer\u00e1 DNS A z\u00e1znam<\/strong><\/p>\n\n\n\n

*  600  IN  A   37.9.175.133<\/pre>\n\n\n    \t\t
\r\n    \t\t\tPr\u00edklad nastavenia A z\u00e1znamov<\/span>    \t\t\t    \t\t\t\t
\r\n    \t\t\t\t\tDom\u00e9na mojadomena.sk<\/em> m\u00e1 pomocou A z\u00e1znamu priraden\u00fa IP adresu 37.9.175.133<\/em>. To znamen\u00e1, \u017ee po zadan\u00ed adresy mojadomena.sk sa v prehliada\u010di zobraz\u00ed obsah zo servera so zadanou IP.    \t\t\t\t<\/p>\r\n    \t\t\t    \t\t\t\r\n    \t\t<\/div>\r\n    \t\t\n\n\n N\u00e1vod pre nastavenie A z\u00e1znamov \u00bb<\/span><\/a>\n\n\n\n
<\/div>\n\n\n\n
MX z\u00e1znamy<\/h3>\n\n\n\n
MX z\u00e1znam<\/strong> (mail exchanger<\/em>) sl\u00fa\u017ei pre ur\u010denie serveru, ktor\u00fd m\u00e1 spracov\u00e1va\u0165 e-maily pre va\u0161u dom\u00e9nu. MX z\u00e1znamov pre jednu dom\u00e9nu m\u00f4\u017eete zada\u0165 hne\u010f nieko\u013eko a e-maily bud\u00fa smerovan\u00e9 pod\u013ea priority t\u00fdchto z\u00e1znamov. Hodnota MX z\u00e1znamu sa zad\u00e1va v textovej podobe (mx10.websupport.sk), nie ako IP adresa.<\/p>\n\n\n\n
Ako vyzer\u00e1 DNS MX z\u00e1znam<\/strong><\/p>\n\n\n\n
@  600  IN  MX   10    mailin1.vasadomena.tld.
@  600  IN  MX   100    mailin2.vasadomena.tld.

alebo

@  600  IN  MX   10    mx10.websupport.sk
@  600  IN  MX   100   mx20.websupport.sk
<\/pre>\n\n\n    \t\t
\r\n    \t\t\tPr\u00edklad nastavenia MX z\u00e1znamov<\/span>    \t\t\t    \t\t\t\t
\r\n    \t\t\t\t\tPre dom\u00e9nu mojadomena.sk m\u00e1te vytvoren\u00fd MX z\u00e1znam s hodnotou \u201cASPMX.L.GOOGLE.COM\u201d . V tom pr\u00edpade bud\u00fa v\u0161etky e-mail zaslan\u00e9 na nieco@mojadomena.sk smerovan\u00e9 na po\u0161tov\u00fd server spolo\u010dnosti Google.    \t\t\t\t<\/p>\r\n    \t\t\t    \t\t\t\r\n    \t\t<\/div>\r\n    \t\t\n\n N\u00e1vod pre nastavenie MX z\u00e1znamov \u00bb<\/span><\/a>\n\n\n\n
<\/div>\n\n\n\n
NS z\u00e1znamy<\/h3>\n\n\n\n
NS z\u00e1znamy, naz\u00fdvan\u00e9 aj nameservery umo\u017e\u0148uj\u00fa ur\u010di\u0165 adresu, kde s\u00fa umiestnen\u00e9 DNS z\u00e1znamy Va\u0161ej dom\u00e9ny. Zmena sa vykon\u00e1va u n\u00e1rodn\u00e9ho registr\u00e1tora danej dom\u00e9ny, ktor\u00fd v\u010faka tomu vie, kam nasmerova\u0165 v\u0161etky prich\u00e1dzaj\u00face dopyty na dan\u00fa adresu. S\u00fa im podraden\u00e9 v\u0161etky ostatn\u00e9 DNS z\u00e1znamy.<\/p>\n\n\n\n
Ako vyzeraj\u00fa NS z\u00e1znamy<\/strong><\/p>\n\n\n\n
@  86400  IN  NS   ns1.websupport.sk.
@  86400  IN  NS   ns2.websupport.sk.
@  86400  IN  NS   ns3.websupport.sk.<\/pre>\n\n\n    \t\t
\r\n    \t\t\tPr\u00edklad nastavenia NS z\u00e1znamov<\/span>    \t\t\t    \t\t\t\t
\r\n    \t\t\t\t\tVa\u0161a dom\u00e9na mojadomena.sk nem\u00e1 u n\u00e1rodn\u00e9ho registr\u00e1tora (napr. SK-NIC) nastaven\u00e9 NS z\u00e1znamy. Takto sa v\u0161etky dopyty po zadan\u00ed mojadomena.sk zastavia u n\u00e1rodn\u00e9ho registr\u00e1tora (napr. SK-NIC) a ned\u00f4jde k ich spracovaniu. Ak v\u0161ak nastav\u00edte NS z\u00e1znamy na ns1.websupport.sk, ns2.websupport.sk, ns3.websupport.sk, tak v\u0161etky dopyty pr\u00eddu do WebSupportu, kde u\u017e pod\u013ea DNS nastaven\u00ed zobraz\u00edme spr\u00e1vny obsah.    \t\t\t\t<\/p>\r\n    \t\t\t    \t\t\t\r\n    \t\t<\/div>\r\n    \t\t\n\n N\u00e1vod pre nastavenie NS z\u00e1znamov \u00bb<\/span><\/a>\n\n\n\n
<\/div>\n\n\n\n
CNAME z\u00e1znamy<\/h3>\n\n\n\n
DNS z\u00e1znam typu CNAME sl\u00fa\u017ei na prevziatie DNS nastavn\u00ed vzorovej dom\u00e9ny. Tieto prevzat\u00e9 nastavenia s\u00fa nadraden\u00e9 vlastn\u00fdm A aj MX z\u00e1znamami dom\u00e9ny. V praxi to znamen\u00e1, \u017ee prehliada\u010d najprv skontroluje nastavenie CNAME z\u00e1znamu a a\u017e ke\u010f zist\u00ed, \u017ee neexistuje, postupuje pod\u013ea MX alebo A z\u00e1znamov.<\/p>\n\n\n\n
Ako vyzer\u00e1 CNAME z\u00e1znam<\/strong><\/p>\n\n\n\n
shop  600  IN  CNAME   www.myshoptet.com.<\/pre>\n\n\n    \t\t
\r\n    \t\t\tPr\u00edklad nastavenia CNAME z\u00e1znamov<\/span>    \t\t\t    \t\t\t\t
\r\n    \t\t\t\t\tDom\u00e9na shop.mojadomena.sk m\u00e1 pomocou CNAME z\u00e1znamu priraden\u00fd z\u00e1znam www.myshoptet.com To znamen\u00e1, \u017ee po zadan\u00ed adresy shop.mojadomena.sk sa v prehliada\u010di zobraz\u00ed obsah vytovren\u00fd na slu\u017ebe Shoptet.     \t\t\t\t<\/p>\r\n    \t\t\t    \t\t\t\r\n    \t\t<\/div>\r\n    \t\t\n\n N\u00e1vod pre nastavenie CNAME z\u00e1znamov \u00bb<\/span><\/a>\n\n\n\n
<\/div>\n\n\n\n
AAAA z\u00e1znamy<\/h3>\n\n\n\n
DNS z\u00e1znamy typu AAAA s\u00fa alternat\u00edvou k A z\u00e1znamom. Pou\u017e\u00edvaj\u00fa sa v pr\u00edpade, \u017ee adresa servera, z ktor\u00e9ho chcete obsah na\u010d\u00edtava\u0165 je v IPv6 form\u00e1te.<\/p>\n\n\n\n
Ako vyzer\u00e1 AAAA z\u00e1znam<\/strong><\/p>\n\n\n\n
*  600  IN  AAAA   2A03: 2880: 2110: df07: face: b00c: 0:1.<\/pre>\n\n\n    \t\t
\r\n    \t\t\tPr\u00edklad nastavenia AAAA z\u00e1znamov<\/span>    \t\t\t    \t\t\t\t
\r\n    \t\t\t\t\tChcete nasmerova\u0165 subdom\u00e9nu blog.mojadomena.sk na server s adresou 2A03: 2880: 2110: df07: face: b00c: 0: 1 (IPv6 facebook). Ako vid\u00edte, nejde o be\u017en\u00fa IP vo form\u00e1te IPv4, ktor\u00e9 pou\u017e\u00edvate v A z\u00e1znamoch. Je to IPv6 adresa a t\u00fa m\u00f4\u017eete jednoducho pou\u017ei\u0165 v AAAA z\u00e1zname.    \t\t\t\t<\/p>\r\n    \t\t\t    \t\t\t\r\n    \t\t<\/div>\r\n    \t\t\n\n\n
Postup pre zmenu AAAA z\u00e1znamu je rovnak\u00fd, ako pre A z\u00e1znamy.<\/strong><\/p>\n\n\n\n
<\/div>\n\n\n\n
TXT z\u00e1znamy<\/h3>\n\n\n\n
DNS z\u00e1znamy typu TXT sl\u00fa\u017eia na\u00a0pridanie textov\u00fdch inform\u00e1ci\u00ed\u00a0<\/strong>do\u00a0DNS z\u00e1znamov<\/strong>\u00a0dom\u00e9ny. To sa \u010dasto vyu\u017e\u00edva pre\u00a0overenie dom\u00e9ny\u00a0<\/strong>alebo doplnkov\u00e9 inform\u00e1cie potrebn\u00e9 k prepojeniu s dom\u00e9ny s extern\u00fdmi slu\u017ebami.
<\/p>\n\n\n\n
Ako vyzer\u00e1 TXT z\u00e1znam<\/strong><\/p>\n\n\n\n
vassadomena.tld  600  IN  TXT   \"google-site-verification= rXOxyZounnZasA8Z7oaD3c14JdjS9aKSWvsR1EbUSIQ\"<\/pre>\n\n\n    \t\t
\r\n    \t\t\tPr\u00edklad nastavenia TXT z\u00e1znamu: <\/span>    \t\t\t    \t\t\t\t
\r\n    \t\t\t\t\tAk chcete pou\u017ei\u0165 dom\u00e9nu v slu\u017ebe Google Apps. Po registr\u00e1cii slu\u017eby, budete vyzvan\u00fd k overeniu vlastn\u00edctva dom\u00e9ny. Jednou z mo\u017enost\u00ed je aj pridanie \u0161pecifick\u00e9ho textu do DNS z\u00e1znamov dom\u00e9ny. To dok\u00e1\u017eete pr\u00e1ve pridan\u00edm nov\u00e9ho TXT z\u00e1znamu.    \t\t\t\t<\/p>\r\n    \t\t\t    \t\t\t\r\n    \t\t<\/div>\r\n    \t\t\n\n Nastavenie TXT z\u00e1znamu \u00bb<\/span><\/a>\n\n\n\n
<\/div>\n\n\n\n
SPF z\u00e1znamy<\/h3>\n\n\n\n
SPF z\u00e1znam<\/strong>(Sender Policy Framework)<\/em> je typ TXT z\u00e1znamu<\/strong>, ktor\u00fd obsahuje inform\u00e1cie o tom, ktor\u00e9 SMTP servery (IP adresy) s\u00fa opr\u00e1vnen\u00e9 odosiela\u0165 emaily z ur\u010ditej dom\u00e9ny. Cie\u013eom SPF je obmedzi\u0165 fal\u0161ovanie odosielate\u013ea v emaile a zabr\u00e1ni\u0165 tak SPAMu.<\/strong><\/p>\n\n\n\n
Ako vyzer\u00e1 SPF z\u00e1znam<\/strong><\/p>\n\n\n\n
v=spf1 a mx include:_spf.m1.websupport.sk ?all<\/pre>\n\n\n    \t\t
\r\n    \t\t\tPr\u00edklad pou\u017eitia SPF z\u00e1znamu<\/span>    \t\t\t    \t\t\t\t
\r\n    \t\t\t\t\tTento z\u00e1znam hovor\u00ed o tom, \u017ee pre dom\u00e9nu vasadomena.tld je autoritat\u00edvny SMTP server smtp.m1.websupport.sk. Ak sa odo\u0161le spr\u00e1va cez smtp.web4u.cz, e-mailov\u00fd server, ktor\u00fd podporuje kontrolu pomocou SPF z\u00e1znamu prekontroluje uveden\u00e9 hodnoty. Ke\u010f\u017ee IP adresa SMTP servera z ktorej bola spr\u00e1va odoslan\u00e1 (smtp.m1.websupport.sk) zodpoved\u00e1 SPF z\u00e1znamu, bude spr\u00e1va \u010falej spracovan\u00e1.    \t\t\t\t<\/p>\r\n    \t\t\t    \t\t\t\r\n    \t\t<\/div>\r\n    \t\t\n\n Viac o SPF z\u00e1znamoch \u00bb<\/span><\/a>\n\n\n\n
<\/div>\n\n\n\n
SRV z\u00e1znamy<\/h3>\n\n\n\n
DNS z\u00e1znam typu SRV<\/strong> sl\u00fa\u017ei na ur\u010denie adresy serverov pre \u0161pecifikck\u00e9 slu\u017eby. \u0160pecialitou SRV z\u00e1znamov je, \u017ee umo\u017e\u0148uj\u00fa rozlo\u017eenie z\u00e1\u0165a\u017ee na viacero adries na z\u00e1klade v\u00e1hy a priority.<\/p>\n\n\n\n
Ako vyzer\u00e1 SRV z\u00e1znam <\/strong><\/p>\n\n\n\n
_xmpp-client._tcp.mojadomen.sk 1800 SRV 5 0 5222 talk.l.google.com<\/pre>\n\n\n    \t\t
\r\n    \t\t\tPr\u00edklad nastavenia SRV z\u00e1znamov<\/span>    \t\t\t    \t\t\t\t
\r\n    \t\t\t\t\tAk sa v r\u00e1mci slu\u017eby Google Apps prepojenej s Va\u0161ou dom\u00e9nou rozhodnete pou\u017e\u00edva\u0165 chat, budete vyzvan\u00fd prida\u0165 do DNS z\u00e1znamov dom\u00e9ny nie\u010do ako \u201c_xmpp-client._tcp.mojadomen.sk 1800 SRV 5 0 5222 talk.l.google.com\u201d. Presne na to v\u00e1m posl\u00fa\u017ei SRV z\u00e1znam.    \t\t\t\t<\/p>\r\n    \t\t\t    \t\t\t\r\n    \t\t<\/div>\r\n    \t\t\n\n Nastavenie SRV z\u00e1znamu \u00bb<\/span><\/a>\n\n\n\n
<\/div>\n\n\n\n
CAA z\u00e1znamy<\/h3>\n\n\n\n
Z\u00e1znam CAA<\/strong> (Certification Authority Authorization) \u2013 autoriz\u00e1cia certifika\u010dnej autority, sa pou\u017e\u00edva na ur\u010denie certifika\u010dnej autority (CA), ktor\u00e1 m\u00f4\u017ee vyd\u00e1va\u0165 SSL certifik\u00e1ty pre konkr\u00e9tnu dom\u00e9nu. Z\u00e1znamy CAA <\/strong>m\u00f4\u017eu nastavi\u0165 pravidl\u00e1 pre cel\u00fa dom\u00e9nu alebo pre konkr\u00e9tne subdom\u00e9ny.<\/p>\n\n\n\n
Ako vyzer\u00e1 CAA z\u00e1znam<\/strong><\/p>\n\n\n\n
@  600  IN  CAA   128 issue \"letsencrypt.org\"<\/pre>\n\n\n\n Nastavenie CAA z\u00e1znamu \u00bb<\/span><\/a>\n\n\n\n
<\/p>\n\n\n\n
SSHFP z\u00e1znamy<\/h3>\n\n\n\n
DNS SSHFP<\/strong> zaznam (Secure Shell fingerprint record)<\/em> obsahuje odtla\u010dky verejn\u00fdch k\u013e\u00fa\u010dov pou\u017eit\u00fdch pre SSH pripojenie. Pou\u017e\u00edvaj\u00fa sa najm\u00e4 s dom\u00e9nami s povolen\u00fdm DNSSEC. Z\u00e1znam SSHFP sa pri prip\u00e1jan\u00ed SSH klienta k serveru porovn\u00e1va, a ak s\u00fa odtla\u010dky z\u00e1znamu rovnak\u00e9 ako tie na servery, klient sa m\u00f4\u017ee bezpe\u010dne pripoji\u0165.<\/p>\n\n\n\n
Ako vyzer\u00e1 SSHFP z\u00e1znam<\/strong><\/p>\n\n\n\n
host.example.com. 1800 SSHFP 2 1 123456789abcdef67890123456789abcdef67890<\/pre>\n\n\n\n Nastavenie SSHFP z\u00e1znamu \u00bb<\/span><\/a>\n\n\n\n
<\/p>\n\n\n\n
TLSA z\u00e1znamy<\/h3>\n\n\n\n
TLS autoriza\u010dn\u00fd z\u00e1znam<\/strong> (TLSA) sa pou\u017e\u00edva na priradenie TLS server certifik\u00e1tu alebo verejn\u00e9ho k\u013e\u00fa\u010da k dom\u00e9ne na ktorej sa z\u00e1znam nach\u00e1dza. Pomocou TLSA z\u00e1znamu je mo\u017en\u00e9 ulo\u017ei\u0165 odtla\u010dok certifik\u00e1tu TLS \/ SSL do DNS va\u0161ej dom\u00e9ny.<\/p>\n\n\n\n
TLSA z\u00e1znam m\u00e1 zmysel generova\u0165 len ak je na dom\u00e9ne aktivovan\u00fd DNSSEC kedy je zaru\u010den\u00e1 d\u00f4veryhodnos\u0165 odpovedi z DNS.<\/p>\n\n\n\n
Ako vyzer\u00e1 TLSA z\u00e1znam<\/strong><\/p>\n\n\n\n
_100._tcp.www.domena.tld. IN TLSA 3 1 1 1fff7351cdb3957d2d3edd0f7d48bb6246f25361006c1f83379b85c6f3071adc<\/pre>\n\n\n\n Nastavenie TLSA z\u00e1znamu \u00bb<\/span><\/a>\n\n\n\n
<\/p>\n\n\n\n
LOC z\u00e1znamy<\/h3>\n\n\n\n
Z\u00e1znam LOC sa pou\u017e\u00edva na vyjadrenie inform\u00e1ci\u00ed o geografickom umiestnen\u00ed dom\u00e9ny. Z\u00e1znam DNS vy\u017eaduje inform\u00e1cie ako stupne zemepisnej \u0161\u00edrky (d1) [0..90], stupne zemepisnej d\u013a\u017eky (d2) [0..180], min\u00faty zemepisnej \u0161\u00edrky a d\u013a\u017eky (m1, m2) [0..59], sekundy zemepisnej \u0161\u00edrky a d\u013a\u017eky (s1,s2) [0..59.999], nadmorsk\u00fa v\u00fd\u0161ka v metroch (alt) [-100000,00..42849672,95] a ve\u013ekos\u0165 \/ presnos\u0165 v metroch (siz, hp, vp) [0..90000000,00]\n\n\n\n
Ako vyzer\u00e1 LOC z\u00e1znam<\/strong><\/p>\n\n\n\n
LOC record statdns.net.   IN LOC   52 22 23.000 N 4 53 32.000 E -2.00m 0.00m 10000m 10m<\/pre>\n\n\n\n Nastavenie LOC z\u00e1znamu \u00bb<\/span><\/a>\n\n\n\n
<\/p>\n\n\n\n
CERT z\u00e1znamy<\/h3>\n\n\n\n
Z\u00e1znam LOC sa pou\u017e\u00edva na vyjadrenie inform\u00e1ci\u00ed o geografickom umiestnen\u00ed dom\u00e9ny. Z\u00e1znamy CERT ukladaj\u00fa certifik\u00e1ty a Certificate revocation list (CRL) pre kryptografick\u00e9 k\u013e\u00fa\u010de. DNS z\u00e1znam vy\u017eaduje inform\u00e1cie ako typ certifik\u00e1tu [0..65535], key tag [0..65535], pou\u017eit\u00fd algoritmus [0-65535], certifik\u00e1t alebo CRL v Base 64 form\u00e1te.<\/p>\n\n\n\n Nastavenie CERT z\u00e1znamu \u00bb<\/span><\/a>\n\n\n\n
Pr\u00e1ca s DNS z\u00e1znamami – v\u0161eobecne<\/h2>\n\n\n\n
1) Prihl\u00e1ste sa na webovej str\u00e1nke admin.websupport.sk<\/a><\/p>\n\n\n\n
2) Kliknite na Slu\u017eby<\/strong> a vyberte<\/strong> po\u017eadovan\u00fa dom\u00e9nu<\/strong> pre zmenu DNS z\u00e1znamov.<\/p>\n\n\n\n
3) V menu<\/strong> na\u013eavo kliknite na kateg\u00f3riu DNS<\/strong> a vyberte<\/strong> si po\u017eadovan\u00fd typ<\/strong> DNS<\/strong> z\u00e1znamu na zmenu.<\/p>\n\n\n\n
4) Zobraz\u00ed<\/strong> sa V\u00e1m zvolen\u00e1 kateg\u00f3ria DNS<\/strong> z\u00e1znamov.<\/p>\n\n\n\n
5) Ak prepisujete z\u00e1znamy<\/strong> na in\u00e9 <\/strong>ako na\u0161e (mimo Websupport). V tom pr\u00edpade je potrebn\u00e9, aby ste pri ich \u00faprave zmenili aj z\u00e1znamy v r\u00e1mci rovnakej kateg\u00f3rie<\/strong>, ktor\u00e9 spolu s\u00favisia<\/strong> napr\u00edklad s presmerovan\u00edm str\u00e1nky na in\u00fa IP adresu.<\/p>\n\n\n\n
6) Napr\u00edklad pri nastaven\u00ed A z\u00e1znamov<\/strong> mimo Websupport je potrebn\u00e9, aby ste najprv odstr\u00e1nili A z\u00e1znamy pre zobrazenie webu<\/strong> ako s\u00fa mojadomena.sk, www.mojadomena.sk a *mojadomena.sk. 

a) N\u00e1sledne odpor\u00fa\u010dame zmaza\u0165 AAAA z\u00e1znamy<\/strong> pre web rovnak\u00e9ho typu: mojadomena.sk, www.mojadomena.sk a *mojadomena.sk. Ak poskytovate\u013e vy\u017eaduje AAAA z\u00e1znam, pridajte ho tam.

b) Dodato\u010dne pridajte po\u017eadovan\u00e9 DNS<\/strong> A<\/strong> z\u00e1znamy<\/strong> pod\u013ea potreby, ktor\u00e9 s\u00fa uveden\u00e9 v n\u00e1vode od in\u00e9ho poskytovate\u013ea<\/strong> kam bud\u00fa po novom A z\u00e1znamy smerova\u0165.<\/strong>

7) Napr\u00edklad pri nastaven\u00ed CNAME z\u00e1znamu<\/strong> odpor\u00fa\u010dame skontrolova\u0165<\/strong>, \u010di u\u017e neexistuje www z\u00e1znam v DNS A<\/strong> (www.mojadomena.sk)<\/strong> alebo DNS AAAA <\/strong>kateg\u00f3rii (www.mojadomena.sk), nako\u013eko by ste dostali chybu v r\u00e1mci webadminu pri nastaven\u00ed duplicitn\u00e9ho z\u00e1znamu v inej DNS kateg\u00f3rii.<\/p>\n\n\n\n
DNS Check<\/h2>\n\n\n\n
To ak\u00e9 m\u00e1 konkr\u00e9tna dom\u00e9na nastaven\u00e9 DNS z\u00e1znamy vieme skontrolova\u0165 viacer\u00fdmi sp\u00f4sobmi.<\/p>\n\n\n\n
DNS checker<\/h3>\n\n\n\n
Napr\u00edklad na tejto<\/a><\/strong> adrese n\u00e1jdeme mo\u017enos\u0165 pozrie\u0165 si najzn\u00e1mej\u0161ie DNS z\u00e1znamy. Sta\u010d\u00ed zada\u0165 n\u00e1zov dom\u00e9ny (alebo subdom\u00e9ny) a zvoli\u0165 ktor\u00fd z\u00e1znam chceme skontrolova\u0165.<\/p>\n\n\n\n
Pr\u00edkazov\u00fd riadok<\/h3>\n\n\n\n
To ak\u00e9 ma dom\u00e9na nastaven\u00e9 DNS z\u00e1znamy si vieme skontrolova\u0165 aj cez termin\u00e1l podporuj\u00faci host pr\u00edkaz. Napr\u00edklad ak chcem vedie\u0165 ak\u00fd DNS A z\u00e1znam<\/strong> m\u00e1 dom\u00e9na websupport.sk pou\u017eijem pr\u00edkaz:<\/p>\n\n\n\n
host -t a websupport.sk<\/strong><\/em>\n\nwebsupport.sk has address 37.9.169.171\nwebsupport.sk has address 37.9.169.172\nwebsupport.sk has address 37.9.169.173<\/em><\/pre>\n\n\n\n

Rovnako si vieme skontrolova\u0165 in\u00e9 DNS z\u00e1znamy, napr\u00edklad DNS MX z\u00e1znamy<\/strong>:<\/p>\n\n\n\n
host -t mx websupport.sk<\/em><\/strong>\n\nwebsupport.sk mail is handled by 5 mailin1.websupport.sk.\nwebsupport.sk mail is handled by 10 mailin2.websupport.sk<\/em>.<\/pre>\n","protected":false},"excerpt":{"rendered":"
Syst\u00e9m DNS z\u00e1znamov sl\u00fa\u017ei na internete a na po\u010d\u00edta\u010dov\u00fdch sie\u0165ach na prekladanie dom\u00e9nov\u00fdch n\u00e1zvov na IP adresy a zabezpe\u010duje tak zjednodu\u0161enie komunik\u00e1cie a pohybu na internete. \u010casto je prirovn\u00e1van\u00fd k telef\u00f3nnemu zoznamu, prira\u010fuje toti\u017e IP adres\u00e1m slovn\u00fd (dom\u00e9nov\u00fd) n\u00e1zov. Pou\u017e\u00edvate\u013e si v\u010faka DNS nemus\u00ed pam\u00e4ta\u0165 IP adresu str\u00e1nky, ale iba n\u00e1zov dom\u00e9ny….<\/p>\n","protected":false},"author":30,"template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[37,30],"ht-kb-tag":[291],"class_list":["post-2301","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-dns-zaznamy","ht_kb_category-domeny","ht_kb_tag-dns"],"yoast_head":"\n\u010co je to DNS - Websupport centrum podpory<\/title>\n<meta name=\"description\" content=\"Syst\u00e9m DNS z\u00e1znamov sl\u00fa\u017ei na internete a na po\u010d\u00edta\u010dov\u00fdch sie\u0165ach na prekladanie dom\u00e9nov\u00fdch n\u00e1zvov na IP adresy a zabezpe\u010duje tak zjednodu\u0161enie komunik\u00e1cie a pohybu na internete.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.websupport.sk\/podpora\/kb\/co-je-to-dns\/\" \/>\n<meta property=\"og:locale\" content=\"sk_SK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u010co je to DNS - Websupport centrum podpory\" \/>\n<meta property=\"og:description\" content=\"Syst\u00e9m DNS z\u00e1znamov sl\u00fa\u017ei na internete a na po\u010d\u00edta\u010dov\u00fdch sie\u0165ach na prekladanie dom\u00e9nov\u00fdch n\u00e1zvov na IP adresy a zabezpe\u010duje tak zjednodu\u0161enie komunik\u00e1cie a pohybu na internete.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.websupport.sk\/podpora\/kb\/co-je-to-dns\/\" \/>\n<meta property=\"og:site_name\" content=\"Websupport centrum podpory\" \/>\n<meta property=\"article:modified_time\" content=\"2025-02-18T15:35:03+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Predpokladan\u00fd \u010das \u010d\u00edtania\" \/>\n\t<meta name=\"twitter:data1\" content=\"18 min\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.websupport.sk\\\/podpora\\\/kb\\\/co-je-to-dns\\\/\",\"url\":\"https:\\\/\\\/www.websupport.sk\\\/podpora\\\/kb\\\/co-je-to-dns\\\/\",\"name\":\"\u010co je to DNS - 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