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Cannot reach one specific IPv6 from one specific network (self.sysadmin)

submitted 2 years ago by TwinTurbo to c/sysadmin

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cross-posted from: https://lemmy.world/post/224140

My home ISP does CGNAT for IPv4, but provides native IPv6. I can use IPv6 just fine to access most of my resources, except for one specific server. I can access the server over IPv4 from my home network, and either over v4 or v6 from other networks I've tried. But I can't access it over IPv6 from my home network.

What could be the problem here? Where do I begin to diagnose it

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[–] TwinTurbo 2 points 2 years ago

From other ISPs it works fine. I haven’t checked from someone else using the same ISP, but that’s a good idea. Thanks!