Hosts File Not Working Firefox

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  1. Posts : 32
    Windows 10 (64)
       #1

    Hosts File Not Working Firefox


    Hello again,

    My hosts file will only block sites in Edge, not in Firefox.

    Can't be right. Any ideas ?

    Windows 10 1909

    Regards

    Nordland
      My Computer


  2. Posts : 25,029
    10 Home x64 (21H2) (10 Pro on 2nd pc)
       #2

    Who is your ISP and do they support using IPv6? Your HOSTS file may only be blocking IPv4 addresses.
      My Computers


  3. Posts : 56,100
    Multi-boot Windows 10/11 - RTM, RP, Beta, and Insider
       #3

    Nordland said:
    Hello again,

    My hosts file will only block sites in Edge, not in Firefox.

    Can't be right. Any ideas ?

    Windows 10 1909

    Regards

    Nordland
    Zip your hosts file and post it here so we can take a look. May be something simple.
      My Computers


  4. Posts : 32
    Windows 10 (64)
    Thread Starter
       #4

    f14tomcat said:
    Zip your hosts file and post it here so we can take a look. May be something simple.
    ) It probably is ...

    It's so short that making a zip of it wouldn't achieve much. Copy/pasted here:



    # Copyright (c) 1993-2009 Microsoft Corp.
    #
    # This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
    #
    # This file contains the mappings of IP addresses to host names. Each
    # entry should be kept on an individual line. The IP address should
    # be placed in the first column followed by the corresponding host name.
    # The IP address and the host name should be separated by at least one
    # space.
    #
    # Additionally, comments (such as these) may be inserted on individual
    # lines or following the machine name denoted by a '#' symbol.
    #
    # For example:
    #
    # 102.54.94.97 rhino.acme.com # source server
    # 38.25.63.10 x.acme.com # x client host

    # localhost name resolution is handled within DNS itself.
    # 127.0.0.1 localhost
    # ::1 localhost
    127.0.0.1 mikrotik.com



    Regards

    Nordland
      My Computer


  5. Posts : 1,604
    Win 10 home 20H2 19042.1110
       #5
      My Computers


  6. Posts : 5,203
    21H1 64 Bit Home
       #6

    Delete 127.0.0.1 mikrotik.com

    Replace with 0.0.0.0 mikrotik.com


    Just delete last line.
      My Computer


  7. Posts : 56,100
    Multi-boot Windows 10/11 - RTM, RP, Beta, and Insider
       #7

    Deleting the last line gives you an empty hosts file, which may be fine. Doesn't explain your statement that it blocks in Edge, not Firefox. Is this the legacy Edge or Edge Chromium (new one)?

    FYI: mikrotik.com is a Router Manufacturer out of Latvia.

    "MikroTik is a Latvian company which was founded in 1996 to develop routers and wireless ISP systems."

    MikroTik Routers and Wireless
      My Computers


  8. Posts : 1,867
    Windows 10 Pro 2004 20H1
       #8

    Apparently Firefox likes www before the domain name -

    Example -

    127.0.0.1 www.tenforums.com
      My Computer


  9. Posts : 5,203
    21H1 64 Bit Home
       #9

    OldNavyGuy said:
    Apparently Firefox likes www before the domain name -

    Example -

    127.0.0.1 www.tenforums.com
    As far as I know you can add both entries with and without www

    Quote from another source:

    The HOSTS file now contains a change in the prefix in the HOSTS entries to "0.0.0.0" instead of the usual "127.0.0.1".
    This was done to resolve a slowdown issue that occurs with the change Microsoft made in the "TCP loopback interface"
    Using 0.0.0.0 is empirically faster, possibly because there's no wait for a timeout resolution.
    So I always use 0.0.0.0

    Hosts File Not Working Firefox-replace-ip.jpg
    Hosts File Not Working Firefox-hosts-notepad.jpg
      My Computer


  10. Posts : 1,867
    Windows 10 Pro 2004 20H1
       #10

    Tested with Firefox 78.0.1

    Did not work without the www prefix...for me.

    The www prefix worked in both Firefox and new Edge.
      My Computer


 

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