C:\Users\Administrator>ping tool.eu.org

C:\Users\Administrator>ipconfig /displaydns |powershell -Command "$input |Out-String -stream |Select-String -pattern ': tool' -Context 2,4"

       tool.eu.org
       ----------------------------------------
>      Record Name . . . . . : tool.eu.org
       Record Type . . . . . : 1
       Time To Live  . . . . : 1476
       Data Length . . . . . : 4
       Section . . . . . . . : Answer

If you occur problem in compilation, check the file and symlink.
/usr/ports/devel/llvm80 # make
(...)
===> Building for llvm80-8.0.1_3 ninja: error: '/usr/local/lib/libexecinfo.so', needed by 'bin/lldb-argdumper', missing and no known rule to make it ===> Compilation failed unexpectedly.
% ls -l /usr/local/lib/libexecinfo.so lrwxr-xr-x 1 root wheel 16 May 19 2014 /usr/local/lib/libexecinfo.so -> libexecinfo.so.1
% which /usr/local/lib/libexecinfo.so /usr/local/lib/libexecinfo.so: Command not found.
% file /usr/local/lib/libexecinfo.so /usr/local/lib/libexecinfo.so: broken symbolic link to libexecinfo.so.1
# unlink /usr/local/lib/libexecinfo.so

Very poor stock firmware

replaced by:
http://dl.eko.one.pl/luci/lede/17.01-SNAPSHOT/targets/ramips/mt7620/luci-17.01-snapshot-r3948-5886a5060a-ramips-mt7620-wt3020-8M-squashfs-factory.bin

When you connecting and obtaining IP through dhcp, the file /etc/resolv.conf could be created.
If You want to have yours DNS servers, not this from your network/internet provider, you can:

1. write protect the file /etc/resolv.conf

# chattr +i /etc/resolv.conf

Penetration testing
https://techincidents.com/important-penetration-testing-cheat-sheet

Windows Command Line
https://www.windows-commandline.com

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