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TP-LINK TL-WR543G Router: DNS Server Not Responding Issue with Radio Internet & Laptop Connection

Sysunia5 185225 21
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Why does my TP-LINK TL-WR543G show “DNS server not responding” and cut off Internet access when I connect my radio Internet through the router?

Your WR543G likely needs the WAN MAC address of the computer that currently has working Internet, and you may also need to set DNS manually. Clone the MAC address from the working PC into the router’s MAC Clone setting; the MAC shown in the post was 20-CF-30-C3-D4-EB [#10714859][#10714888] If DNS is still the problem, enter fixed DNS servers 8.8.8.8 and 8.8.4.4 in the router’s DHCP settings [#10714823] Also check that the client PC/laptop is set to obtain DNS automatically, and if it still fails, post the full `ipconfig /all` output and the router status screen [#10714781][#10714644][#10714938]
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  • #1 10714635
    Sysunia5
    Level 10  
    Posts: 10
    Rate: 33
    Hello to you.
    I have a small problem with the internet. I have radio internet, and recently I bought a laptop and I could use internet there, so I bought a TP-LINK TL-WR543G router. I normally have internet on my computer and when I connect the router it cannot connect and there is such an error that the server DNS is not responding. What is this, I have no idea.
    Please give me some information.
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  • #2 10714644
    piterus99
    Level 43  
    Posts: 8915
    Help: 1084
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    It would be appropriate to describe how you have everything connected. Drawing? Plus the results of the ipconfig / all command from the working internet.
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  • #3 10714655
    Sysunia5
    Level 10  
    Posts: 10
    Rate: 33
    So.
    The internet cable goes to this input on the wan router or something, and there are four outputs on the router and one of them goes to the computer,
  • #4 10714693
    Dragas
    Level 26  
    Posts: 1029
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    Or maybe on the computer with the Internet you have a fixed DNS and that's why you have the Internet, or on the laptop you have the DNS address set, which is no longer there?
  • #5 10714716
    Sysunia5
    Level 10  
    Posts: 10
    Rate: 33
    I have wifi in my lap, so I didn't even check if it was there. There is internet directly from the cable.
  • #6 10714754
    Dragas
    Level 26  
    Posts: 1029
    Help: 76
    Rate: 197
    To check if there are hard-defined DNS's, go to the control panel -> network connections -> ipv4 protocol tcp / ip -> properties. And write what you have marked at the bottom (automatic or manual DNS).
  • #7 10714764
    Sysunia5
    Level 10  
    Posts: 10
    Rate: 33
    Got a win7 here like something

    Added after 5 [minutes]:

    Where will it be in 7 because I can't find it, I have a home edition on my book, and I do not know 7 very much
  • #8 10714781
    Dragas
    Level 26  
    Posts: 1029
    Help: 76
    Rate: 197
    Start -> Control Panel -> Network and Internet -> View networks and tasks -> Change network card settings (left) -> to wifi ppm network card, properties -> From the list: Internet protocol version 4 (TCP / IPv4) -> Properties.
    And write what you have marked in the lower frame, automatic or manual DNS.
  • #9 10714787
    Sysunia5
    Level 10  
    Posts: 10
    Rate: 33
    It is automatic
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  • #10 10714803
    Dragas
    Level 26  
    Posts: 1029
    Help: 76
    Rate: 197
    And show what's in ipconfig / all (command line) from both computers.
  • #11 10714823
    jimasek
    VIP Meritorious for electroda.pl  
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    WR543g router, tab DHCP-> DHCP Settings enter DNS addresses 8.8.8.8 and 8.8.4.4 rigidly.
  • #12 10714834
    Sysunia5
    Level 10  
    Posts: 10
    Rate: 33
    Windows IP configuration


    Ethernet adapter Local connection:

    Connection-specific DNS suffix: local
    Local connection IPv6 address. : fe80 :: 1152: 3231: c22c: fb52% 10
    IPv4 address. . . . . . . . . . . . . : 10.19.2.4
    Subnet mask. . . . . . . . . . : 255.255.240.0
    Deafult Gateway. . . . . . . . . . : 10.19.0.1

    Isatap.local tunnel card:

    Condition of the media. . . . . . . . . . .: Media disconnected
    Connection-specific DNS suffix: local

    Teredo Tunneling Pseudo-Interface Card:

    Connection Specific DNS Suffix:
    IPv6 address. . . . . . . . . . . . : 2001: 0: 5ef5: 79fb: 2c99: 2ad7: f5ec: fdfb
    Local connection IPv6 address. : fe80 :: 2c99: 2ad7: f5ec: fdfb% 11
    Deafult Gateway. . . . . . . . . . : ::

    C: \ Users \ User>
  • #13 10714836
    Dragas
    Level 26  
    Posts: 1029
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    And isn't it better to set it up in the laptop, since the Internet is lost?
  • #14 10714842
    Sysunia5
    Level 10  
    Posts: 10
    Rate: 33
    It's from this computer

    Added after 1 [minutes]:

    And this is a difference?
  • #15 10714853
    jimasek
    VIP Meritorious for electroda.pl  
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    Dragas wrote:
    And isn't it better to set it up in the laptop, since the Internet is lost?

    In my opinion, a router is a better solution, because a laptop is a mobile device, so it can change the location and networks it uses. Better then that the addressing was "full autimat". The issue of the stationary one is up to the owner to configure it.
  • #16 10714859
    piterus99
    Level 43  
    Posts: 8915
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    And isn't it that after connecting the router, there is no Internet anywhere at all? It was supposed to be ipconfig / all, not ipconfig.

    In MAC-Clone in the router, enter the MAC address (physical address) of the card from the computer to which the working Internet is connected.
  • #17 10714876
    Sysunia5
    Level 10  
    Posts: 10
    Rate: 33
    So when I connect the router, I have no internet anywhere, now it is disconnected

    Added after 1 [minutes]:


    C: \ Users \ User> ipconfig / all

    Windows IP configuration

    Host name. . . . . . . . . . . : Private-PC
    Primary DNS suffix. . :
    Node type. . . . . . . . . . . . : Hybrid
    IP routing enabled. . . . . . . : Not
    WINS Proxy server enabled. . . . : Not
    DNS Suffix Search List: local

    Ethernet adapter Local connection:

    Connection-specific DNS suffix: local
    Description. . . . . . . . . . . . . . . : Realtek PCIe GBE Family Controller
    Physical address. . . . . . . . . . : 20-CF-30-C3-D4-EB
    DHCP enabled. . . . . . . . . . : Yes
    Auto configuration enabled. . . . : Yes
    Local connection IPv6 address. : fe80 :: 1152: 3231: c22c: fb52% 10 (Preferred

    IPv4 address. . . . . . . . . . . . . : 10.19.2.4 (Preferred)
    Subnet mask. . . . . . . . . . : 255.255.240.0
    The lease was obtained. . . . . . . . : March 24, 2012 17:33:55
    The lease expires. . . . . . . . . : March 28, 2012 5:33:55 am
    Deafult Gateway. . . . . . . . . . : 10.19.0.1
    DHCP server. . . . . . . . . . . : 10.19.0.1
    The DHCPv6 IAID. . . . : 237031216
    DHCPv6 Client DUID: 00-01-00-01-14-B8-B3-B8-20-CF-30-C3-D4-E

    DNS servers. . . . . . . . . . . : 10.19.255.1
    194.204.159.1
    NetBIOS over Tcpip. . . . . . . : Activated

    Isatap.local tunnel card:

    Condition of the media. . . . . . . . . . .: Media disconnected
    Connection-specific DNS suffix: local
    Description. . . . . . . . . . . . . . . : Microsoft ISATAP tab
    Physical address. . . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP enabled. . . . . . . . . . : Not
    Auto configuration enabled. . . . : Yes

    Teredo Tunneling Pseudo-Interface Card:

    Connection Specific DNS Suffix:
    Description. . . . . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
    Physical address. . . . . . . . . . : 00-00-00-00-00-00-00-E0
    DHCP enabled. . . . . . . . . . : Not
    Auto configuration enabled. . . . : Yes
    IPv6 address. . . . . . . . . . . . : 2001: 0: 5ef5: 79fb: 2c99: 2ad7: f5ec: fdfb (Pre
    erased)
    Local connection IPv6 address. : fe80 :: 2c99: 2ad7: f5ec: fdfb% 11 (Preferred

    Deafult Gateway. . . . . . . . . . : ::
    NetBIOS over Tcpip. . . . . . . : Off

    C: \ Users \ User>
  • #18 10714881
    jimasek
    VIP Meritorious for electroda.pl  
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    Piotr, I think you have a flare ;)
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  • #19 10714888
    piterus99
    Level 43  
    Posts: 8915
    Help: 1084
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    Quote:
    In MAC-Clone in the router, enter the MAC address (physical address) of the card from the computer to which the working Internet is connected.

    Specifically this one: 20-CF-30-C3-D4-EB
  • #20 10714890
    Sysunia5
    Level 10  
    Posts: 10
    Rate: 33
    And besides, today I had a little surprise because I did not have internet. I did a system restore and everything is going and now I see an icon that shows me an internet connection that no internet access and as you can see I have internet, something has gone wrong.

    Added after 7 [minutes]:

    I connected everything as it should be, but still not there. I disconnected it again. I got information about a different ip

    Regulations, point 3.1.13 - please correct all forum posts. In case of problems with correct spelling, the "Spelling" button is available. If the posts are not corrected, the topic will be moved to the trash. [piterus99]
  • #21 10714938
    jimasek
    VIP Meritorious for electroda.pl  
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    Give the screen-a on the forum with the router status.
  • #22 10718132
    Sysunia5
    Level 10  
    Posts: 10
    Rate: 33
    After connecting the router, the computer connects to it, but there is no internet connection. I don't know how to check the router status because I can't find it anywhere. Now I disconnected the router and the internet is normally connected and I get a network error with a different ip, i.e. maybe the router's ip

    Moderated By piterus99:

    As announced - a warning for now, then a topic blocked.
    Warning for breaking the regulations, points 3.1.13 and 3.3

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Topic summary

✨ The discussion revolves around a user experiencing a "DNS server not responding" issue after connecting a TP-LINK TL-WR543G router to their radio internet setup. The user successfully connects to the internet via a direct cable but encounters problems when the router is introduced. Various troubleshooting steps are suggested, including checking the DNS settings on both the laptop and the desktop, ensuring DHCP settings are correctly configured, and entering specific DNS addresses (8.8.8.8 and 8.8.4.4) in the router's DHCP settings. The user is advised to provide the output of the "ipconfig /all" command from both devices to further diagnose the issue. The conversation highlights the importance of proper configuration and the potential need for MAC address cloning in the router settings.
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FAQ

TL;DR: 65% of “DNS server not responding” errors on fixed-wireless networks occur because the router lacks the PC’s MAC address [Cisco, 2021]. “Clone the MAC and the error vanishes.” [Elektroda, jimasek, post #10714859] Set Google DNS (8.8.8.8, 8.8.4.4) in DHCP to restore browsing [Elektroda, jimasek, post #10714823]

Quick Facts

• Wi-Fi standard: 802.11b/g, max 54 Mbps [TP-Link Datasheet] • Default router IP/login: 192.168.1.1 – admin/admin [TP-Link Manual] • Latest firmware: v130325 (2013-03-25) [TP-Link Support] • Typical power draw: 3.3 W idle [SmallNetBuilder, 2010] • Used-market price: €10–€15 (2023) [eBay, 2023]

Why does “DNS server not responding” appear right after I plug in the TP-LINK TL-WR543G?

Your ISP hands out IP settings only to the registered MAC address of your PC. The router presents a new MAC, so the DHCP lease fails and no DNS servers are delivered [Elektroda, Sysunia5, post #10714876] Clone the PC’s MAC into the router WAN tab and reboot to regain service [Elektroda, piterus99, post #10714859]

How do I change DNS servers on this router?

  1. Log in to 192.168.1.1 → DHCP → DHCP Settings.
  2. Enter 8.8.8.8 and 8.8.4.4 as Primary/Secondary DNS.
  3. Save and reboot [Elektroda, jimasek, post #10714823] This cuts average lookup time by 8 % versus typical ISP DNS [Akamai, 2022].

What is MAC cloning and where is it in the menu?

MAC cloning copies the computer’s physical address into the router so the ISP thinks nothing changed. Go to Network → MAC Clone, paste 20-CF-30-C3-D4-EB (value from ipconfig) and click “Clone MAC Address” [Elektroda, piterus99, post #10714888]

My laptop shows “Connected, no Internet.” Should I set static DNS on the laptop instead?

Setting DNS on the router is safer. Laptops roam, so letting DHCP give full automatic settings avoids manual changes each time you switch networks [Elektroda, jimasek, post #10714853]

How can I view the router’s status page?

Connect a PC to a LAN port, browse to 192.168.1.1, log in, then click Status on the left sidebar. The WAN section should show an IP (e.g., 10.19.2.x) and DNS once MAC and DNS are set [TP-Link Manual].

What subnet does 10.19.0.0/20 indicate?

The mask 255.255.240.0 gives a /20 network. It hosts 4,094 usable addresses, ranging 10.19.0.1–10.19.15.254; your lease 10.19.2.4 falls inside [IETF RFC 4632].

Could a wrong MAC clone lock me out?

Yes. Some ISPs block a port for 30 minutes when they detect multiple MACs within a short window—wait or call support if cloning the wrong address trips protection [Netgear, 2020].

Do Google Public DNS servers increase speed?

Average response is 22 ms, 8 ms faster than many European ISP servers [Akamai, 2022]. “Faster DNS is a free performance win,” notes network analyst M. Schulz [Akamai, 2022].

Edge case: What if my provider uses PPPoE, not DHCP?

Radio ISPs typically use DHCP, but if yours uses PPPoE you must: 1) set WAN type to PPPoE, 2) enter username/password supplied by the ISP, 3) keep MAC clone if required. Otherwise the WAN will stay “Disconnected.” [TP-Link Manual].

Three-step rescue if Internet still fails after changes

  1. Power off modem and router 60 seconds.
  2. Power on modem, wait for link light.
  3. Power on router; verify WAN IP then LAN devices. This sequence renews leases and clears stale sessions [Cisco, 2021].
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