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0 pointsmschuster913mo ago0 comments

> I'm not really seeing a reason why it would be impossible to open firewalls in that scenario.

Cheap ass ISP-managed routers. Got to be lucky for these rubbish bins to even somewhat reliably provide IPv6 connectivity to clients at all, or you run into bullshit like new /64's being assigned every 24 hours, or they may provide IPv6 but not provide any firewall control...

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themafia3mo ago

> or you run into bullshit like new /64's being assigned every 24 hours

It'd be nice if DNS servers supported this. Save the 64 host bits in the zone and just use whatever 64 prefix bits happen to be issued right now.

Otherwise it makes a strong case for the continued use of "private networks" and the IPv6 ULA mechanism.

lxgr3mo ago

> Otherwise it makes a strong case for the continued use of "private networks" and the IPv6 ULA mechanism.

Let's please not. Even without inbound reachability, hole punching is significantly easier given globally routeable addresses.

themafia3mo ago

You can have /both/ a ULA and a Globally Routable address. In practice it works just fine. My internal DNS points to the ULA for internal connectivity and my hosts use their global addresses for external connectivity.

lxgr3mo ago

Ah, you mean for cases where you want both stable addresses (even if only internal) and globally reachable ones (even if non-constant)?

Yeah, that works, but everything gets much easier if your internal DNS can just support the varying prefix natively, e.g. via integration with the external-facing DHCP or PPPoE or whatever other address configuration protocol you use, since then you can reach everything both locally and globally by name.

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themafia3mo ago

> or you run into bullshit like new /64's being assigned every 24 hours

It'd be nice if DNS servers supported this. Save the 64 host bits in the zone and just use whatever 64 prefix bits happen to be issued right now.

Otherwise it makes a strong case for the continued use of "private networks" and the IPv6 ULA mechanism.

lxgr3mo ago

> Otherwise it makes a strong case for the continued use of "private networks" and the IPv6 ULA mechanism.

Let's please not. Even without inbound reachability, hole punching is significantly easier given globally routeable addresses.

themafia3mo ago

lxgr3mo ago

Ah, you mean for cases where you want both stable addresses (even if only internal) and globally reachable ones (even if non-constant)?

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