add: autonat #278
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add: autonat #278
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p-shahi
requested changes
Jan 7, 2023
Co-authored-by: Prithvi Shahi <[email protected]>
p-shahi
approved these changes
Jan 7, 2023
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thanks @p-shahi! |
| addresses, however, it is possible that some of these addresses are not accessible from outside the network, as the peer may be located in a private network that is behind a [NAT](overview.md) and therefore unreachable. | ||
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| To prevent this problem of advertising undialable addresses, libp2p has implemented a protocol called AutoNAT, which allows nodes to determine | ||
| whether or not they are behind a NAT. |
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This is more about determining your position and then taking specific action based on that, for example switching to DHT server mode, or getting a reservation with a relay.
AutoNAT current can't test individual addresses (that's what my AutoNAT v2 proposal would add).
| While the [identify protocol][spec_identify] described above lets peers inform each other about their observed network addresses, not all networks will allow incoming connections on the same port used for dialing out. | ||
| AutoNAT allows a node to request other peers to dial its presumed public addresses. If a few of these | ||
| dial attempts are successful, the node can be reasonably ascertain that it is not behind a NAT. On the other | ||
| hand, if a few of these dial attempts fail, it strongly indicates that a NAT is blocking incoming connections. |
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- if all or most of these dial attempts
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Thanks @marten-seemann. There was no particular reason for the quick merge. |
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