Mobile data traffic unable to reach websites
Unable to reach websites in Plesk while browsing from a device on mobile data, such as AT&T. Wired and wi-fi connections with such services as Cox seem fine.
It appears to be an ipv6 issue.
Steps so far:
Turned off Linode Network Helper
Added the following lines to /etc/sysconfig/sysctl.conf
Added the following lines to /etc/sysconfig/network-scripts/ifcfg-eth0
Regarding Plesk, I cannot add the ipv6 address under Tools & Settings > IP Addresses. My ipv4 address was added automatically.
When trying to add the ipv6 address to Plesk - I get the following error in the Plesk admin and on command line:
Error: ifmng failed: Execution of /sbin/ip addr add 2600:3c00::f03c:91ff:fee1:c865/128 dev eth0 failed with return code 2. Stderr is RTNETLINK answers: File exists