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 1. AWS
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 3. Documentation
 4. AWS VPN
 5. User Guide

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AWS SITE-TO-SITE VPN


USER GUIDE

 * What is Site-to-Site VPN
 * How AWS Site-to-Site VPN works
    * VPN tunnel options
    * VPN tunnel authentication options
    * VPN tunnel initiation options
    * Endpoint replacements
       * Tunnel endpoint lifecycle
   
    * Customer gateway options
    * Accelerated VPN connections
    * Site-to-Site VPN routing options
       * IPv4 and IPv6 traffic

 * Getting started tutorial
 * Architectures
    * Single and multiple VPN connections
    * AWS VPN CloudHub
    * Redundant VPN connections

 * Your customer gateway device
    * Example configurations for static routing
    * Example configurations for dynamic routing (BGP)
    * Windows Server as a customer gateway device
    * Troubleshooting
       * Device with BGP
       * Device without BGP
       * Cisco ASA
       * Cisco IOS
       * Cisco IOS without BGP
       * Juniper JunOS
       * Juniper ScreenOS
       * Yamaha

 * Work with Site-to-Site VPN
    * Create a VPN attachment for AWS Cloud WAN
    * Create a transit gateway VPN attachment
    * Test a VPN connection
    * Delete a VPN connection
    * Modify the target gateway of a VPN connection
    * Modify VPN connection options
    * Modify VPN tunnel options
    * Edit static routes for a VPN connection
    * Change the customer gateway for a VPN connection
    * Replace compromised credentials
    * Rotate VPN tunnel endpoint certificates
    * Private IP VPN with AWS Direct Connect

 * Security
    * Data protection
    * Identity and access management
       * How AWS Site-to-Site VPN works with IAM
       * Identity-based policy examples
       * Troubleshooting
       * Using service-linked roles
   
    * Resilience
    * Infrastructure security

 * Monitoring your Site-to-Site VPN connection
    * AWS Site-to-Site VPN logs
       * Contents of Site-to-Site VPN logs
   
    * Monitoring VPN tunnels using Amazon CloudWatch
    * Monitoring VPN connections using AWS Health events

 * Quotas
 * Document history

What is AWS Site-to-Site VPN? - AWS Site-to-Site VPN
AWSDocumentationAWS VPNUser Guide
ConceptsSite-to-Site VPN featuresSite-to-Site VPN limitationsWorking with
Site-to-Site VPN Pricing


WHAT IS AWS SITE-TO-SITE VPN?

PDFRSS

By default, instances that you launch into an Amazon VPC can't communicate with
your own (remote) network. You can enable access to your remote network from
your VPC by creating an AWS Site-to-Site VPN (Site-to-Site VPN) connection, and
configuring routing to pass traffic through the connection.

Although the term VPN connection is a general term, in this documentation, a VPN
connection refers to the connection between your VPC and your own on-premises
network. Site-to-Site VPN supports Internet Protocol security (IPsec) VPN
connections.

CONTENTS

 * Concepts
 * Site-to-Site VPN features
 * Site-to-Site VPN limitations
 * Working with Site-to-Site VPN
 * Pricing


CONCEPTS

The following are the key concepts for Site-to-Site VPN:

 * VPN connection: A secure connection between your on-premises equipment and
   your VPCs.

 * VPN tunnel: An encrypted link where data can pass from the customer network
   to or from AWS.
   
   Each VPN connection includes two VPN tunnels which you can simultaneously use
   for high availability.

 * Customer gateway: An AWS resource which provides information to AWS about
   your customer gateway device.

 * Customer gateway device: A physical device or software application on your
   side of the Site-to-Site VPN connection.

 * Target gateway: A generic term for the VPN endpoint on the Amazon side of the
   Site-to-Site VPN connection.

 * Virtual private gateway: A virtual private gateway is the VPN endpoint on the
   Amazon side of your Site-to-Site VPN connection that can be attached to a
   single VPC.

 * Transit gateway: A transit hub that can be used to interconnect multiple VPCs
   and on-premises networks, and as a VPN endpoint for the Amazon side of the
   Site-to-Site VPN connection.


SITE-TO-SITE VPN FEATURES

The following features are supported on AWS Site-to-Site VPN connections:

 * Internet Key Exchange version 2 (IKEv2)

 * NAT traversal

 * 4-byte ASN in the range of 1 – 2147483647 for Virtual Private Gateway (VGW)
   configuration. See Customer gateway options for your Site-to-Site VPN
   connection for more information.

 * 2-byte ASN for Customer Gateway (CGW) in the range of 1 – 65535. See Customer
   gateway options for your Site-to-Site VPN connection for more information.

 * CloudWatch metrics

 * Reusable IP addresses for your customer gateways

 * Additional encryption options; including AES 256-bit encryption, SHA-2
   hashing, and additional Diffie-Hellman groups

 * Configurable tunnel options

 * Custom private ASN for the Amazon side of a BGP session

 * Private Certificate from a subordinate CA from AWS Private Certificate
   Authority

 * Support for IPv6 traffic for VPN connections on a transit gateway


SITE-TO-SITE VPN LIMITATIONS

A Site-to-Site VPN connection has the following limitations.

 * IPv6 traffic is not supported for VPN connections on a virtual private
   gateway.

 * An AWS VPN connection does not support Path MTU Discovery.

In addition, take the following into consideration when you use Site-to-Site
VPN.

 * When connecting your VPCs to a common on-premises network, we recommend that
   you use non-overlapping CIDR blocks for your networks.


WORKING WITH SITE-TO-SITE VPN

You can create, access, and manage your Site-to-Site VPN resources using any of
the following interfaces:

 * AWS Management Console— Provides a web interface that you can use to access
   your Site-to-Site VPN resources.

 * AWS Command Line Interface (AWS CLI) — Provides commands for a broad set of
   AWS services, including Amazon VPC, and is supported on Windows, macOS, and
   Linux. For more information, see AWS Command Line Interface.

 * AWS SDKs — Provide language-specific APIs and takes care of many of the
   connection details, such as calculating signatures, handling request retries,
   and error handling. For more information, see AWS SDKs.

 * Query API— Provides low-level API actions that you call using HTTPS requests.
   Using the Query API is the most direct way to access Amazon VPC, but it
   requires that your application handle low-level details such as generating
   the hash to sign the request, and error handling. For more information, see
   the Amazon EC2 API Reference.


PRICING

You are charged for each VPN connection hour that your VPN connection is
provisioned and available. For more information, see AWS Site-to-Site VPN and
Accelerated Site-to-Site VPN Connection pricing.

You are charged for data transfer out from Amazon EC2 to the internet. For more
information, see Data Transfer on the Amazon EC2 On-Demand Pricing page.

When you create an accelerated VPN connection, we create and manage two
accelerators on your behalf. You are charged an hourly rate and data transfer
costs for each accelerator. For more information, see AWS Global Accelerator
pricing.

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How AWS Site-to-Site VPN works
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 * Concepts
 * Site-to-Site VPN features
 * Site-to-Site VPN limitations
 * Working with Site-to-Site VPN
 * Pricing





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