Re: [quicwg/base-drafts] 5tuple routing (#3536)

martinduke <notifications@github.com> Wed, 25 March 2020 18:52 UTC

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Date: Wed, 25 Mar 2020 11:50:40 -0700
From: martinduke <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] 5tuple routing (#3536)
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@martinduke commented on this pull request.



> +## Considerations for 5-tuple routing architectures
+
+QUIC servers can be deployed behind a 5-tuple based routing architecture that
+delivers packets based on both the source and destination IP addresses and
+ports. In such an architecture, clients that change IP address or port are
+likely to be routed to a different server. There are several actions that can
+mitigate or resolve operational and security issues in this case.
+
+* Servers can use an out-of-band mechanism to deliver packets to the correct
+destination or transfer state from the original destination. Properly designed,
+this completely solves the problem and no further measures are necessary.
+
+* Sending the disable_active_migration transport parameter informs the client
+that any address change is likely to terminate the connection, which can lead it
+to use more aggressive timeouts or terminate connections when its IP address
+changes.

I'm not specifically referring to idle timeouts.  A client might send a PING periodically, for instance, to avoid NAT rebinding.

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