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When I disable IPV6 on my Debian install I can't reach the internet, and whenever I ping anything I get ping: unknown host ...

This is how I am currently disabling IPV6

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1

in my /etc/sysctl.conf

  • Please add more details, including exactly what it falls and possible logs. The post is rather too vague as it is – Rui F Ribeiro Oct 15 '18 at 20:59
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The root of this problem was that in my /etc/resolv.conf I had domain hsd1.XX.comcast.net as the first entry which was IPV6, and so I had no DNS. I fixed the problem by simply commenting that line out with a #.

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    This answer makes no sense. Changing the DNS client library's search path does not cut off DNS service. It merely makes the client ask different sequences of questions. – JdeBP Oct 16 '18 at 7:36

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