Perplexed on no internet with DHCP DNS, but full internet with manual

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  1. Posts : 26
    Win 10 Home V22H2
       #1

    Perplexed on no internet with DHCP DNS, but full internet with manual


    OK, so here's the problem, well, actually more of a perplexing problem as I can't figure out how it happens, I recently changed router, I saved the old router config (same models), and loaded them in the new router, but I didn't know this, but my IPV4 DNS was set to manual using Google's public DNS 8.8.8.8 and 8.8.4.4, so with my new router and everything working, I set the IPV4 settings in the NIC properties back to DHCP on both IP and DNS, then suddenly, the icon on the taskbar changed to 'No Internet', I tried a reboot and even network troubleshooter and windows couldn't find any problems, so I changed the NIC IPV4 back to IP = DHCP and DNS = manual, and re-entered Google's public DNS IP addresses, as primary and secondary DNS, and everything started to work again. I checked my router the WAN is set to DHCP IP and DHCP DNS, showing my WAN IP address and my ISP DNS addresses, but set my PC to DHCP on both IP and DNS it blocks internet, and I HAVE to set DNS to manual. I've even tried flushing DNS, renewing DNS, Releasing DNS, all using ipconfig and still the same.

    So, here's the perplexing question, how come I can't use DHCP DNS but I can use manual DNS?

    OS I'm using:-

    Edition Windows 10 Home
    Version 22H2
    Installed on ‎12/‎5/‎2022
    OS build 19045.3086
    Experience Windows Feature Experience Pack 1000.19041.1000.0
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  2. Posts : 4,830
    Windows 11 Pro 64 Bit 22H2
       #2

    I saved the old router config (same models), and loaded them in the new router

    Because you use the old routers Config file. Write down the configured settings,
    Press in the Reset to Default button on the back of the router and manually reset the router with your configuration data.
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  3. Posts : 8,139
    windows 10
       #3

    When set to DHCP from CMD type
    Ipconfig /all

    Post results
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  4. Posts : 26
    Win 10 Home V22H2
    Thread Starter
       #4

    spunk said:
    [FONT="]
    Because you use the old routers Config file. Write down the configured settings,
    Press in the Reset to Default button on the back of the router and manually reset the router with your configuration data. [/FONT]
    I tried that and got the same result. Changing the router settings doesn't impact the computer IPV4 settings, they are separate.

    - - - Updated - - -

    Samuria said:
    When set to DHCP from CMD type
    Ipconfig /all

    Post results
    OK, ipconfig /all with DHCP:-

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : Usalabs-HP
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Hybrid
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No

    Ethernet adapter VirtualBox Host-Only Network:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : VirtualBox Host-Only Ethernet Adapter
    Physical Address. . . . . . . . . : 0A-00-27-00-00-0D
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
    IPv4 Address. . . . . . . . . . . : 192.168.253.1(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . :
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter Ethernet:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
    Physical Address. . . . . . . . . : 4C-72-B9-08-0C-28
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    Autoconfiguration IPv4 Address. . : 169.254.222.249(Tentative)
    Subnet Mask . . . . . . . . . . . : 255.255.0.0
    Default Gateway . . . . . . . . . :
    NetBIOS over Tcpip. . . . . . . . : Enabled

    ipconfig /ALL with manual DNS and DHCP IP address:

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : Usalabs-HP
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Hybrid
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No

    Ethernet adapter VirtualBox Host-Only Network:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : VirtualBox Host-Only Ethernet Adapter
    Physical Address. . . . . . . . . : 0A-00-27-00-00-0D
    DHCP Enabled. . . . . . . . . . . : No
    Autoconfiguration Enabled . . . . : Yes
    IPv4 Address. . . . . . . . . . . : 192.168.253.1(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . :
    NetBIOS over Tcpip. . . . . . . . : Enabled

    Ethernet adapter Ethernet:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
    Physical Address. . . . . . . . . : 4C-72-B9-08-0C-28
    DHCP Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    IPv4 Address. . . . . . . . . . . : 192.168.0.99(Preferred)
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Lease Obtained. . . . . . . . . . : Sunday, July 30, 2023 5:56:23 AM
    Lease Expires . . . . . . . . . . : Tuesday, August 01, 2023 5:57:58 AM
    Default Gateway . . . . . . . . . : 192.168.0.1
    DHCP Server . . . . . . . . . . . : 192.168.0.1
    DNS Servers . . . . . . . . . . . : 8.8.8.8
    8.8.4.4
    NetBIOS over Tcpip. . . . . . . . : Enabled
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  5. Posts : 8,139
    windows 10
       #5

    When using dhcp you get Autoconfiguration IPv4 Address. . : 169.254.222.249(Tentative) which means its not getting dhcp and no gateway so no net. So either it cant rach the dhcp or its not enabled or set wrong on the router reset the router to factory state see if it works then
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  6. Posts : 26
    Win 10 Home V22H2
    Thread Starter
       #6

    Samuria said:
    When using dhcp you get Autoconfiguration IPv4 Address. . : 169.254.222.249(Tentative) which means its not getting dhcp and no gateway so no net. So either it cant rach the dhcp or its not enabled or set wrong on the router reset the router to factory state see if it works then
    That's the thing though, manual DNS settings, does retrieve IP addresses from the router DHCP, but fully setting both the LAN IP and DNS to DHCP block internet, as if nothing is reaching the router, but leave the LAN IP set to DHCP, but set the DNS to manual then enter Google DNS, it all works.

    The attached image shows the DNS setting manually set, but if I just select the 'Obtain DNS server address automatically' then the command ipconfig /all shows no gateway or DNS, so I HAVE to set the DNS as seen in the screenshot, otherwise nothing works:-

    Perplexed on no internet with DHCP DNS, but full internet with manual-manual-dns.png
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  7. Posts : 4,830
    Windows 11 Pro 64 Bit 22H2
       #7

    As stated and shown in your IP Config logs. Using Automatic DNS shows the 169.254.x.x IP address assigned, and no IP address for the Default Gateway. Meaning the computer cannot connect to the Default Gateway (your router). And with Manual DNS, it shows the Default Gateway 192.168.253.1

    When using Manual DNS, your DHCP server is assigning the IP address 192.168.253.1(Preferred) but Your Default Gateway (Router) IP Address is 192.168.0.1 meaning the Scope of your Routers DNS server is not configured correctly and is set to 192.168.253.x. instead of 192.168.0.x You either need to reset your Router to Defaults, and manually setup your router, or you need to reset the DNS server on the router and Gateway address to 192.168.253.x.
    Much easier just to reset the router/modem to factory defaults and start over.
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  8. Posts : 26
    Win 10 Home V22H2
    Thread Starter
       #8

    spunk said:
    As stated and shown in your IP Config logs. Using Automatic DNS shows the 169.254.x.x IP address assigned, and no IP address for the Default Gateway. Meaning the computer cannot connect to the Default Gateway (your router). And with Manual DNS, it shows the Default Gateway 192.168.253.1

    When using Manual DNS, your DHCP server is assigning the IP address 192.168.253.1(Preferred) but Your Default Gateway (Router) IP Address is 192.168.0.1 meaning the Scope of your Routers DNS server is not configured correctly and is set to 192.168.253.x. instead of 192.168.0.x You either need to reset your Router to Defaults, and manually setup your router, or you need to reset the DNS server on the router and Gateway address to 192.168.253.x.
    Much easier just to reset the router/modem to factory defaults and start over.
    You were looking at the Virtualbox host adapter, not the Ethernet adapter Ethernet: the Virtualbox adapter doesn't use DHCP, and has it's own static IP address 192.168.253.1, I suggest you look further down, it's the last entry in the ipconfig /all list, with "Realtek PCIe GbE Family Controller" as the NIC description.

    I did reset the router to factory settings, and used 192.168.0.1 in a browser to access the admin console, and leaving everything as is, should have allowed internet, but it didn't, until I opened the windows NIC properties, and manually set the DNS to Google's public servers, then it all worked with the router's default settings, for some reason, Windows is ignoring the DNS server IP addresses issued by the router DHCP.
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  9. Posts : 8,139
    windows 10
       #9

    By default its normally set to the router which is very slow
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  10. Posts : 4,830
    Windows 11 Pro 64 Bit 22H2
       #10

    OK,
    But there is no DNS server listed when you use DHCP.
    Make sure in Windows that you have the Obtain DNS Server automatically checked.
    Then press the Advanced Button, go to the DNS tab. If the Manual DNS address is listed, press the Remove button
    And the rest of the settings looking like this
    Attached Thumbnails Attached Thumbnails Perplexed on no internet with DHCP DNS, but full internet with manual-qemuk-1-.png  
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