I'm using Maxis Fiber 10 mbps. Since yesterday I discovered that I can't connect to certain sites such as:

microsoft.com
wikipedia.org
yahoo.com
lowyat.net

The connection seems to fail when trying to establish a https secure connection. Most other sites like all Google sites, Facebook etc. work.

This holds true for three Windows 10 PCs on my home network. Needless to say, I'm confused.

I'm currently connecting to lowyat.net through my phone.

I don't have TeamViewer. Of course I've restarted modem, router and all computers multiple times. Symptoms persist despite changing browsers. I usually use Chrome. I downloaded and installed a fresh copy of Firefox. Same problems. The same goes for Microsoft Edge.

I can't find a single website that I can't connect to using http only. It seems to affect only some https connections.

I've checked for malware using Windows Defender and Malwarebytes. Nothing turns up.

All other Internet services seem to work, including torrent, Steam etc.

It feels great to know that at least one other Maxis Fiber user is facing the same problem. At least we know that it's an ISP level issue. I also noticed that we now have an IPv6 address. Previously we only had an IPv4 address I think. Have you tried complaining yet? Hopefully they will fix this fast.

I use Google DNS by default. Switching between auto DNS settings and Google DNS doesn't solve the issue.

Wow, you are right. Disabling IPv6 does work. Using only IPv4, I can access all sites, even Google. How come you can't? So strange. Still need to test this further.

Looks like you have somehow configured it to use ipv6 only on Google? Anyway, I totally turned off ipv6 and everything is fine.

If I go to ipv6.google.com then of course it doesn't work. But the normal google.com works.

Maybe you have ipv6 disabled by default?

I had my DNS servers set by default to Google's even for ipv6. Switching between this and auto DNS didn't seem to help.

I actually did do that earlier when diagnosing. Tracert does work. The issue isn't connecting to the sites. It's that it somehow can't negotiate a secure connection once it reaches them. Anyway, I'll do it again and post the results.

And done. Sites stop working immediately once I enable ipv6. Tracert still works.

C:\Users\User>tracert -6 forum.lowyat.net

Tracing route to forum.lowyat.net [2401:3400:2000:1::17]
over a maximum of 30 hops:

1 <1 ms 1 ms 1 ms 2001:d08:dc:4893::1
2 5 ms 6 ms 5 ms 2001:d08:b1:10::5a
3 10 ms 9 ms 10 ms 2001:d08:b1:10::5b
4 * * * Request timed out.
5 9 ms 8 ms 9 ms 2001:d08:b1:2::1
6 11 ms 23 ms 12 ms 2001:d08:b1:22::6
7 12 ms 14 ms 13 ms 2001:de8:10::24
8 15 ms 17 ms 17 ms 2401:3400:2401::104a
9 15 ms 18 ms 17 ms forum.lowyat.net [2401:3400:2000:1::17]

Trace complete.

Going through any kind of free proxy server allows me to access all sites, even with ipv6 enabled. I already tried that earlier.

I'm in Seremban 2. I think all Maxis Fiber users are affected, just depends on whether they have ipv6 enabled.

You said you're on wifi but you only changed your settings for LAN (local area network). You need to make the same changes to the wifi connection.

I think the only way to fix that is to change the router's settings to disable ipv6 there. The precise details there will depend on what models you have. Someone posted instructions a few posts up but I don't know if they work.

I tested on both of my home PCs. The problem is the same as before for me if I re-enable IPv6.

I don't know about anyone else, but it's definitely still not fixed for me.

As mentioned earlier, if your phone doesn't work the only recourse is to disable ipv6 on the router level. How to do that would depend on exactly what router you have. It might even be impossible.

I also can confirm that it works for all sites with ipv6 reenabled. How many days was it? And no communications from Maxis at all. A lot of customers must have been very confused and frustrated.

Wow, this problem still exists?