Nidaamka Magaca Domain-ka^{(Domain Name System)} ( DNS ) Seerfarku waa meesha lagu kaydiyo dhammaan magacyada boggaga aad booqatay. Markaad ka raadinayso magac domain browserka shabakada, waxaa u gudbiya routerkaaga server-ka DNS . Haddii magaca goobta gaarka ah la keydiyay, waxay soo celinaysaa cinwaanka IP-ga ee u dhigma. Tani waxay ka dhigaysaa habka rarka ee goobahaas si gaar ah dhakhso. 

Sida habkani u weyn yahay, maaha wax aan caadi ahayn in server-ka DNS uu ku guuldareysto inuu sameeyo xiriir waqti ka waqti. Isku dayga in lagu xaliyo biraawsarkaaga mareegtan tusaale ahaan waxa ay inta badan keeni kartaa qalad ' Serfar DNS^(DNS) ah oo aan ka jawaabin'.

Arrimo badan ayaa sababi kara in khaladkan gaarka ahi ka soo muuqdo shaashaddaada. Midda ugu caansan oo ah suurtagalnimada in server-ka laftiisa uu hadda la kulmo cillad. Nasiib wanaag, dhibaatadan waxaa badanaa la socda dhowr xalal fudud.

Sida loo hagaajiyo "DNS Server aan la heli karin" Khaladka^{(How To Fix The “DNS Server Unavailable” Error)}

Ma ku heshay khalad ah in server-ka DNS aanu diyaar ahayn? Si deg deg ah loo xalliyo, dhibaatooyinkan waxaa mararka qaarkood lagu sixi karaa wax fudud sida beddelka browser-yada, ku khalkhalgelinta dhawr ka mid ah goobahaaga dab-damiska, ama dib-u-kicinta routerkaaga. Adiga ayay ku xiran tahay inaad ogaato sababta iyo sixitaan dambe ee dhibaatada. 

Ka bilow inaad u isticmaasho browser kale boggaga internetka ee aad isku dayayso inaad furto. Tani waxay la macno tahay in haddii aad hadda khaladka ku jirto markaad isticmaalayso browserka Mozilla Firefox , u beddel Microsoft Edge ama Google Chrome . Haddii dhibaatadu sii jirto, waxaan u gudbi karnaa inaan tijaabino aaladaha kale.

Isku day inaad furto bogga internetka adigoo isticmaalaya aaladda mobaylka, isla shabakadda, si aad u hubiso in dhibaatadu aanay ahayn natiijada cilladaha qalabka. Waxa kale oo ay faa'iido u yeelan doontaa in la isku dayo in lagu xidho isla boggaga internetka adiga oo isticmaalaya qorshahaaga xogta si loo ogaado haddii sababta ay tahay, dhab ahaantii, server-ka DNS .

Markaad dhammayso tillaabooyinkan, dib u bilow routerkaaga. Haddii cilada "Serer-ka DNS aan la heli karin" uu weli jiro, waa inaan marsiin doonaa dhowr habab oo waxtar leh.

Dareemida DNS-kaaga (Windows)^{(Flushing Your DNS (Windows))}

Habka ugu waxtarka badan ee lagu xallinayo arrinta iyada oo aan la heli karin server-ka DNS waa in la nadiifiyo iyada oo la adeegsanayo Command Prompt .

• Soo jiid wadahadalka Run adoo isku mar riixaya furaha Windows iyo furaha^{(Windows key and R key)} R.
• Ku qor cmd garoonka dhexdiisa oo tabo Gelida^(Enter) .
• Daaqadda Command Prompt, ku qor ipconfig /flushdns oo tabo Gelida^(Enter) .

• Lasoco adigoo ku qoraya ipconfig /release oo tabo Gelida^(Enter) .

• Ugu dambeyntii, ku qor ipconfig /renew oo taabo Gelida^(Enter) .

• Ka xidh daaqada Command Prompt oo dib u bilow nidaamkaaga.

Dareemida DNS-kaaga (MacOS)^{(Flushing Your DNS (MacOS))}

Waxaad sidoo kale ku daadin kartaa DNS -ka Mac . Habka aad tan u samaynayso wax yar way kala duwanaan doontaa iyadoo ku xidhan nooca Mac -ga kombuyuutarku ku socdo. Waxay badanaa ku lug leedahay oo kaliya isbeddel ku yimaadda syntax ee la isticmaalo inta lagu jiro habka.

1. Fur daaqada Finder ka dibna u gudub Applications^{(Applications)} , oo ay ku xigto Utilities , oo ku dhamaanaysa Terminalka^(Terminal) .
2. Geli syntax-kan soo socda ee khuseeya nooca MacOS ee aad hadda isticmaalayso:
   • MacOS High Sierra - sudo killall -HUP mDNSResponder; sleep 2; echo macOS DNS Cache Reset | say
   • MacOS Sierra – sudo killall -HUP mDNSResponder; dheh cache DNS waa la daadiyay^{(sudo killall -HUP mDNSResponder;say DNS cache has been flushed)}
   • MacOS Mojave – sudo killall -HUP mDNSResponder;hurdo 2;^{(sudo killall -HUP mDNSResponder;sleep 2;)}
   • MacOS X El Capitan/Yosemite - sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder; dheh cache nadiif ah^{(sudo dscacheutil -flushcache;sudo killall -HUP mDNSResponder;say cache flushed)}
3. Riix furaha soo celinta^{(Return )} , geli eraygaaga sirta ah, ka dibna ku dhufo furaha soo noqoshada^{(Return )} mar kale.
4. Sug digniinta maqalka ee tilmaamaysa daadinta DNS^(DNS) ee guulaystay ka hor inta aanad ka bixin Terminalka^(Terminal) .

Nadiifinta kaydka MacOS X waxay u baahan doontaa dhowr tillaabo oo dheeri ah si si buuxda looga saaro. Waa inaad ku shubtaa khasnadaha MDNS^(MDNS) iyo UDNS labadaba tillaabooyinka hore loo qaaday.

Kahor intaadan ka bixin Terminalka^(Terminal) , samee amarada soo socda:

1. Kaydka MDNS, ku qor sudo discoveryutil mdnsflushcache
2. Kaydka UDNS, ku qor sudo discoveryutil udnsflushcaches

Ka saar Fayrasyo ​​badan^{(Remove Multiple Antiviruses)}

"Weligaa ma yeelan kartid ilaalin aad u badan." Tani waxay noqon kartaa waxoogaa run ah adduunka dhabta ah, laakiin adduunka tignoolajiyada, helitaanka barnaamijyo badan oo ka hortag ah oo lagu rakibay kumbuyuutar isku mid ah ayaa runtii caqabad ku noqon kara ilaalinta la bixiyay. 

Hubi si aad u aragto haddii aad haysatid laba ama in ka badan oo ka mid ah barnaamijyada antivirus hadda socda sababtoo ah tani waxay noqon kartaa sababta arrinta DNS . Markaad joojiso dhammaan barnaamijyada dheeraadka ah, dib u bilaw nidaamkaaga, dhibaataduna waa inay is xallisaa.

Hubi in aad horay u socotid oo kaliya hal barnaamij oo software ah oo socda si aad isaga difaacdo weerarada malware-ka ah ee aadan rabin. Tani kaliya ma kordhinayso amniga laakiin waxay kaa caawin kartaa inaad iska ilaaliso inaad gasho khaladaad badan oo server- ka DNS ah.^(DNS)

Beddelida Server-yada DNS^{(Changing DNS Servers)}

Haddii aad mar hore isku dayday dhammaan hagaajinta halkan ku qoran oo aad weli helayso isla qaladkii " DNS server aan la heli karin", waxaa laga yaabaa inay dantaada ku jirto inaad beddesho server-yada DNS . Waxaa jira dad badan oo DNS ah oo laga dooran karo, Google's DNS -ka bilaashka ah waa mid ka mid ah doorashooyinka caanka ah.

Habka tani waa mid aad u fudud waxaana lagu samayn karaa dhowr gujis, iyadoo ku xiran meesha aad doorato inaad ka bedesho. Waxaan ku isticmaali doonaa nidaamka hawlgalka Windows mid kasta oo ka mid ah tusaalaheena.^(Windows)

Isbeddellada DNS iyada oo loo marayo Router^{(DNS Changes via Router)}

• Soo gal routerkaaga adiga oo furaya biraawsarkaaga oo geli ciwaanka Default Gateway ee bar ^{(Default Gateway)}URL . 
  • Waxaad ka heli kartaa Default Gateway adiga oo furaya daaqad degdeg ah Command , ku qor ipconfig, oo riixaya Gelida^(Enter) . Nuqul nambarada ku yaal agtiisa Default Gateway ee macluumaadka la jiiday.

• Soo gal router adiga oo isticmaalaya aqoonsiga saxda ah.
• Hel macluumaadka akoonkaaga internetka oo inta badan laga heli karo tab la mid ah oo la magacaabay.
• U gudub server-ka DNS oo dooro ikhtiyaarka sida ugu fiican u muraayadda borotokoolka intarneedka^{(internet protocol)} aad isticmaashay (IPv4 ama IPv6).
• Geli^(Enter) ciwaanka server-ka DNS ee aad rabto inaad ku isticmaashid bedelka kan hadda jira.
  • Adeegga DNS ee Google wuxuu noqon doonaa 8.8.8.8 ee la door bidayo DNSv4 iyo 8.8.4.4 ee serfarka kale ee DNS^{(alternate DNS server)} . Xaaladda IPv6 , waxaad u baahan doontaa inaad isticmaasho 2001:4860:4860::8888 iyo 2001:4860:4860::8844 siday u kala horreeyaan.
• Keydi macluumaadka la tafatiray oo ka bax interface-ka router.

Isbeddellada DNS iyada oo loo marayo Windows OS^{(DNS Changes via Windows OS)}

• Gal^(Access) guryaha isku xirka shabakadaada adiga oo bilaabaya Run function ( Windows key + R ) oo ku qor ncpa.cpl^(ncpa.cpl) . Riix Gelida^(Enter) .

• Isticmaalayaasha Windows^(Windows) 10 waxay xaq u riixi karaan sumadda Windows ee ku taal bidixda hoose ee shaashadda oo ka dooro Isku-xirka Shabakadaha^{(Network Connections)} menu-ka.
• Dooro^(Select) adabtarada shabakadda ee hadda la isticmaalo. WLAN ee isku xirka WiFi iyo LAN ee isku xirka tooska ah, badiyaa iyada oo loo sii marayo fiilada ethernet.
  • Windows 10 waxay lahaan doontaa fursadahaaga dhinaca dhinaca bidix. Mid ka dooro^{(Select one)} oo ka dooro ikhtiyaarka adabtarada daaqadda weyn .^(Change)
• Midig ku dhufo doorashadaada oo dooro Guryaha^(Properties) .

• Shabakadda Shabakadda^(Networking) , ka saar nooca IP-gaga (v4 ama v6) ee menu-ka oo dhagsii badhanka Guryaha^{(Properties )} .

• Guji radial si aad u isticmaasho ciwaannada serverka DNS ee soo socda:^{(Use the following DNS server addresses:)} si aad awood ugu yeelato tafatirka.

• Geli ciwaannada serverka DNS ee aad qorsheyneyso inaad isticmaasho.
  • Haddii aad isticmaalaysay server-kii hore ee DNS oo aan si toos ah loo helin, xasuusnoow inaad sharaxdo cinwaannada haddii aad rabto inaad ku soo noqoto adoo isticmaalaya taariikh dambe.
• Dhammeystir isbedelada adigoo gujinaya OK .

Tijaabi Server-ka Cusub ee DNS^{(Test New DNS Server)}

Marka server-yada DNS la beddelo, fur browserka oo isku day inaad bilowdo goob si fiican loo yaqaan sida www.google.com . Haddii goobta isla markiiba la heli karo, markaa DNS cusub ayaa si sax ah u shaqeynaya. Haddii kale, geli mid ka mid ah ciwaannada IP-ga Google, 172.217.16.195 , si toos ah u geli browserkaaga oo ku dhufo Gelida^(Enter) . 

Sug sumadda ^(Wait)Google -ka ee la yaqaan iyo baararka raadinta inay soo baxaan. Haddii tani sidoo kale ku guuldareysato, markaas dhibaatadu waxay la jiifsan kartaa internetka ee maaha server-ka DNS laftiisa. La xidhiidh adeeg bixiyahaaga intarneedka si aad u hesho caawimo dheeraad ah haddi arintu sidan tahay.

How To Fix The “DNS Server Unavailable” Error

The Domain Name Sуstem (DNS) server is where all of the domain names for the sites you’vе visited are stored. When searching a domain name in a wеb browser, it is forwarded by your router to a DNS server. If the partіcular sіte’s domain namе has been saved, it then returns the corresponding IP address. Τhis makes the loading process for those sites particularly faster. 

As great as this process is, it’s not uncommon for the DNS server to fail to establish a connection from time to time. Attempting to troubleshoot your web browser in this instance can often result in a ‘DNS server not responding’ error.

Many factors could cause this particular error to show up on your screen. The most prominent of which is the possibility that the server itself is currently experiencing an outage. Luckily, this problem is often accompanied by a few easy solutions.

How To Fix The “DNS Server Unavailable” Error

Have you’ve received an error that the DNS server is unavailable? For a quick fix, these problems can sometimes be corrected by something as simple as changing browsers, messing with a few of your firewall settings, or rebooting your router. It’ll be up to you to figure out the cause and subsequent correction for the problem. 

Start by using a different browser for the web pages you’re trying to open. This means that if you’re currently receiving the error while using the Mozilla Firefox browser, switch it up to Microsoft Edge or Google Chrome. Should the problem persist, we can move on to testing out other devices.

Attempt to open a webpage using a mobile device, on the same network, to ensure that the problem isn’t the result of hardware failures. It would also be beneficial to attempt to connect to the same webpages using your data plan to identify if the cause is, in fact, with the DNS server.

Once you’ve exhausted these steps, reboot your router. If the “DNS server unavailable” error is still present, we’ll have to undergo a few more effective methods.

Flushing Your DNS (Windows)

The most effective method for fixing the issue with the DNS server being unavailable is to flush it using Command Prompt.

• Pull up the Run dialog by simultaneously pressing the Windows key and R key.
• Type cmd into the field and press Enter.
• In the Command Prompt window, type ipconfig /flushdns and press Enter.

• Follow up by typing ipconfig /release and press Enter.

• Finally, type ipconfig /renew and press Enter.

• Close out of the Command Prompt window and reboot your system.

Flushing Your DNS (MacOS)

You can also flush the DNS on a Mac. The way in which you do this will vary slightly depending on the version of Mac your computer is running. It often only involves a change in the syntax used during the process.

1. Open a Finder window and then head into Applications, followed by Utilities, and ending in the Terminal.
2. Enter in the following syntax pertaining to the version of MacOS you’re currently using:
   • MacOS High Sierra – sudo killall -HUP mDNSResponder; sleep 2; echo macOS DNS Cache Reset | say
   • MacOS Sierra – sudo killall -HUP mDNSResponder;say DNS cache has been flushed
   • MacOS Mojave – sudo killall -HUP mDNSResponder;sleep 2;
   • MacOS X El Capitan/Yosemite – sudo dscacheutil -flushcache;sudo killall -HUP mDNSResponder;say cache flushed
3. Press the Return key, enter your password, and then hit the Return key once more.
4. Await the audio alert that indicates a successful DNS flush before exiting the Terminal.

The MacOS X cache clearing will need a few added steps in order to fully flush it out. You’ll have to flush both MDNS and UDNS caches on top of the steps previously taken.

Before exiting from the Terminal, perform the following commands:

1. For the MDNS cache, type sudo discoveryutil mdnsflushcache
2. For the UDNS cache, type sudo discoveryutil udnsflushcaches

Remove Multiple Antiviruses

“You can never have too much protection.” This may be somewhat true in the real world, but in the world of  technology, having multiple antivirus programs installed on the same computer can actually hinder the protection provided. 

Check to see if you have two or more antivirus programs currently running as this may be the reason for the DNS issue. Once you disable all additional programs, reboot your system and the problem should resolve itself.

Ensure that moving forward you only keep a single software program running to help defend yourself from unwanted malware attacks. This not only increases security but can help you avoid running into more DNS server errors.

Changing DNS Servers

If you’ve already attempted all fixes written here and are still receiving the same “DNS server unavailable” error, it may be in your best interest to change your DNS servers. There are plenty of public DNS from which to choose, Google’s free DNS being one of the more popular choices.

The process for this is very simple and can be done in a few clicks, depending on where you choose to change it. We’ll be using the Windows operating system in each of our examples.

DNS Changes via Router

• Access your router by launching your web browser and entering the Default Gateway address into the URL bar. 
  • You can find the Default Gateway by opening a Command prompt window, typing ipconfig, and pressing Enter. Copy the numbers located beside Default Gateway in the pulled up information.

• Login to the router using the proper credentials.
• Locate your internet account information which can often be found in a similarly named tab.
• Navigate to the DNS server and select the option that best mirrors your used internet protocol (IPv4 or IPv6).
• Enter the address of the DNS server you want to use in place of the current one.
  • Google’s DNS server will be 8.8.8.8 in the preferred DNSv4 and 8.8.4.4 in the alternate DNS server. In the case of IPv6, you’ll want to use 2001:4860:4860::8888 and 2001:4860:4860::8844 respectively.
• Save the edited information and exit the router interface.

DNS Changes via Windows OS

• Access your network connection properties by launching the Run function (Windows key + R) and typing in ncpa.cpl. Press Enter.

• Windows 10 users can right-click the Windows icon at the lower left of the desktop screen and select Network Connections from the menu.
• Select the network adapter currently in use. WLAN for WiFi connections and LAN for direct connection, usually via ethernet cable.
  • Windows 10 will have your options on the left side panel. Select one and choose Change adapter options from the main window.
• Right-click your choice and select Properties.

• In the Networking tab, highlight your IP version (v4 or v6) from the menu and click the Properties button.

• Click the radial for Use the following DNS server addresses: to enable editing capabilities.

• Enter in the DNS server addresses you plan to use.
  • If you had been using a previous DNS server not obtained automatically, remember to annotate the addresses just in case you want to return using them at a later date.
• Finalize the changes by clicking OK.

Test New DNS Server

Once the DNS servers have been changed, open a browser and attempt to launch a well-known site like www.google.com. If the site is immediately accessible, then the new DNS is functioning properly. If not, enter one of Google’s IP addresses, 172.217.16.195, directly into your browser and hit Enter. 

Wait for the familiar Google logo and search bar to appear. If this also fails, then the problem may lie with the internet and not the DNS server itself. Contact your internet service provider for additional help if this is the case.

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