For the last couple of hours I've been searching for a reason, why all *.github.io sites (and *.wikia.com) would result in a ERR_Connection_Reset in all my browsers (Vivaldi, Opera, Firefox, Edge, IE, though Firefox and Edge would sometimes work). After writing down my experiences at https://gist.github.com/Saphareas/4e57cf0273f7fa044e2d05991cbe9672 I discovered that it's an issue with IPv6.
Now I just want to know, if this issue is on my end, or if it's a problem with Githubs servers. Does anyone know anything about this?
Solved! Solved! Go to Solution.
GitHub, including Pages, doesn't currently support IPv6. (Though you can test if your end of the connection does using a tool like https://test-ipv6.com/)
We're always working to improve GitHub, and we consider every suggestion we receive. I've logged your request internally. Though I can't guarantee anything or share a timeline for this, I can tell you that it's been shared with the appropriate teams for consideration.
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Like many that are commenting here, it wasn't until a search was done that we have found out why our IPv6 systems cannot connect to GitHub. Please allow access to IPv6, which has been around for many years and is quite ubiquitous now. More and more hosting companies are charging us extra to use their precious, few IPv4 addresses and are giving away IPv6 addresses like a howitzer hitting a pinata.
Dual stack which functions normally and all I get is connection timed out when trying to download from github.
Oh well, hope whoever's sticking with github to migrateto gitlab soon!