Disable IPv6

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If you are facing router problems or any other issues with ubuntu. First try to disable IPv6 support built into Ubuntu as majority of the current home hardware doesn't support IPv6 at the moment.

Open the file /etc/modprobe.d/aliases and change the following line

net-pf-10 ipv6

to

net-pf-10 ipv6 off

Reboot the system and check if you are still facing the issue.

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