Return-Path: X-Original-To: quic-issues@ietfa.amsl.com Delivered-To: quic-issues@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B6492130DFD for ; Tue, 23 Oct 2018 20:55:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -8.47 X-Spam-Level: X-Spam-Status: No, score=-8.47 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.47, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001] autolearn=ham autolearn_force=no Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=github.com Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uXej-NKBwqt4 for ; Tue, 23 Oct 2018 20:55:12 -0700 (PDT) Received: from out-5.smtp.github.com (out-5.smtp.github.com [192.30.252.196]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D070D130DDD for ; Tue, 23 Oct 2018 20:55:11 -0700 (PDT) Date: Tue, 23 Oct 2018 20:55:09 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1540353309; bh=43IPh0L5eu7KXdg1Uy0npSPSJP0zeDUQxmwgQc6b36E=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=QH7AmNoTZbvoIGURiChP13AaqLPoOLOr4jfHbzCdgXsHVUT4ajrFDu3StO/VmXFzK ICt9WHFsmUDKJZRCJ6lcDMIVxRLOZgtC+2T1mqyE1pNs20fjiVSqHT3aTJDwHb6Dl4 TshCm5JvDnZOJ897oTcnlGnPokO3xm+Mm1OHuZto= From: Martin Thomson Reply-To: quicwg/base-drafts To: quicwg/base-drafts Cc: Subscribed Message-ID: In-Reply-To: References: Subject: Re: [quicwg/base-drafts] Move and consolidate address validation (#1886) Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="--==_mimepart_5bcfed1d8306a_438a3ff9364d45bc59816"; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: list X-GitHub-Sender: martinthomson X-GitHub-Recipient: quic-issues X-GitHub-Reason: subscribed X-Auto-Response-Suppress: All X-GitHub-Recipient-Address: quic-issues@ietf.org Archived-At: X-BeenThere: quic-issues@ietf.org X-Mailman-Version: 2.1.29 List-Id: Notification list for GitHub issues related to the QUIC WG List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Oct 2018 03:55:14 -0000 ----==_mimepart_5bcfed1d8306a_438a3ff9364d45bc59816 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit martinthomson commented on this pull request. > @@ -1656,34 +1496,193 @@ One way that a new format could be introduced is to define a TLS extension with a different codepoint. -## Stateless Retries {#stateless-retry} - +# Address Validation + +Address validation is used by QUIC to avoid being used for a traffic +amplification attack. In such an attack, a packet is sent to a server with +spoofed source address information that identifies a victim. If a server +generates more or larger packets in response to that packet, the attacker can +use the server to send more data toward the victim than it would be able to send +on its own. + +The primary defense against amplification attack is verifying that an endpoint +is able to receive packets at the transport address that it claims. Address +validation is performed both during connection establishment (see +{{validate-new}}) and during connection migration (see {{migrate-validate}}). In 7dc45966 -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/quicwg/base-drafts/pull/1886#discussion_r227635358 ----==_mimepart_5bcfed1d8306a_438a3ff9364d45bc59816 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit

@martinthomson commented on this pull request.

In draft-ietf-quic-transport.md:

> @@ -1656,34 +1496,193 @@ One way that a new format could be introduced is to define a TLS extension with
 a different codepoint.
 
 
-## Stateless Retries {#stateless-retry}
-<!-- TODO: Move this section elsewhere. -->
+# Address Validation
+
+Address validation is used by QUIC to avoid being used for a traffic
+amplification attack.  In such an attack, a packet is sent to a server with
+spoofed source address information that identifies a victim.  If a server
+generates more or larger packets in response to that packet, the attacker can
+use the server to send more data toward the victim than it would be able to send
+on its own.
+
+The primary defense against amplification attack is verifying that an endpoint
+is able to receive packets at the transport address that it claims.  Address
+validation is performed both during connection establishment (see
+{{validate-new}}) and during connection migration (see {{migrate-validate}}).

In 7dc4596

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