this behavior seems inconsistent and indicates a possible issue with the IPv6 setup for `vastalauta.org`. Let's break this down:
### Observations:
1. **DNS Response**: The AAAA record for `vastalauta.org` resolves to `2a01:4f9:c012:6ebb::`, which is supposed to represent an IPv6 address.
2. **Ping Results**:
- **`2a01:4f9:c012:6ebb::`**: 100% packet loss, indicating no response from the base address.
- **`2a01:4f9:c012:6ebb::1`**: Responds successfully, meaning that this address is functional.
- **`2a01:4f9:c012:6ebb::2` and `2a01:4f9:c012:6ebb::3`**: 100% packet loss, no response from these addresses.
3. **HTTPS Requests**: You mention that HTTPS requests work to `2a01:4f9:c012:6ebb::1`, which corresponds to the responding ping.
### Analysis:
- The AAAA record (`2a01:4f9:c012:6ebb::`) seems to be a **network address** rather than a specific host address. In IPv6, `::` at the end often indicates the network or default route, not necessarily a configured host.
- The actual host serving HTTPS is `2a01:4f9:c012:6ebb::1`, which responds to both pings and HTTPS requests.
- The base address (`2a01:4f9:c012:6ebb::`) does not respond, which is expected if it’s not explicitly assigned to any host.
- Other addresses in the subnet (e.g., `::2`, `::3`) also do not respond, meaning those addresses are either unconfigured or reserved.
### Possible Issues:
1. **Incorrect AAAA Record**: The AAAA record for `vastalauta.org` should point to `2a01:4f9:c012:6ebb::1`, not `2a01:4f9:c012:6ebb::`.
2. **Misconfigured IPv6 Subnet**: The server's IPv6 configuration might not properly handle traffic directed at the network address.
3. **Load Balancer or Reverse Proxy**: If the server uses a load balancer or reverse proxy, it might only listen on `::1` and not respond to the base address (`::`).