Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: network-manager (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1463169
Title:
NetworkManager should disable IPv6 by default with private IP
addresses
Status in network-manager package in Ubuntu:
Confirmed
Bug description:
Where I live the only ISP is giving DSL customers a cheap Huawei DSL
modem/WiFI router combo device. Except that their customers know
absolutely nothing about configuring it, and when the rare customer
does ask to configure it they refuse to give them the username and
password, claiming that the device belongs to the ISP and only being
"loaned" to the customer. Unfortunately they provide it out of the box
with IPv6 support enabled over the LAN. The connected WiFI devices
still receive an IPv4 address in the 192.168.1.x range, but some kind
of IPv6 support is enable for devices that support it. This does not
pose a problem for Windows, Android, and iOS devices, apparently
because they don't support IPv6.
But unfortunately Ubuntu devices don't work with this configuration. The
device connects to WiFI and receives a 192.168.1.x address with DNS and default
gateway correct, but it can't access the Internet. The way to fix it is:
1. Open NetworkManager "Edit Connections" for the connection
2. In the "IPv6 Settings" tab, set "Method" dropdown to "Ignore"
3. Disconnect and re-connect to WiFI, and it can access the Internet.
These steps are unnecessary. It seems like NetworkManager should
always disable IPv6 whenever it receives and address in the private IP
space, because nobody will use IPv6 on a LAN. This issue is becoming
increasingly common around the world, and it makes Ubuntu look
"complicated" to new users in comparison with the antiquated
proprietary systems that don't support IPv6 and therefore work great
out of the box.
Thanks for considering this improvement.
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