Traffic between VPC and AWS service does not leave the Amazon network
Endpoints are virtual devices, that are horizontally scaled, redundant, and highly available VPC components that allow communication between instances in the VPC and AWS services without imposing availability risks or bandwidth constraints on your network traffic.
Endpoints currently do not support cross-region requests, ensure that the endpoint is created in the same region as the S3 bucket
AWS currently supports the following types of Endpoints
VPC endpoint provides a private connection from VPC to supported AWS services and VPC endpoint services powered by PrivateLink without requiring an internet gateway, NAT device, VPN connection, or AWS Direct Connect connection.
Instances in the VPC do not require public IP addresses to communicate with resources in the service. Traffic between the VPC and the other service does not leave the Amazon network.
VPC Endpoints are virtual devices and are horizontally scaled, redundant, and highly available VPC components that allow communication between instances in the VPC and services without imposing availability risks or bandwidth constraints on the network traffic.
VPC Endpoints are of two types
Interface Endpoints – is an elastic network interface with a private IP address that serves as an entry point for traffic destined to supported services.
Gateway Endpoints – is a gateway that is a target for a specified route in your route table, used for traffic destined to a supported AWS service. Currently only Amazon S3 and DynamoDB.
provides private connectivity between VPCs, AWS services, and your on-premises networks without exposing your traffic to the public internet.
helps privately expose a service/application residing in one VPC (service provider) to other VPCs (consumer) within an AWS Region in a way that only consumer VPCs initiate connections to the service provider VPC.
With ALB as a target of NLB, ALB’s advanced routing capabilities can be combined with AWS PrivateLink.
enables networking connection between two VPCs to route traffic between them using private IPv4 addresses or IPv6 addresses
connections can be created between your own VPCs, or with a VPC in another AWS account.
enables full bidirectional connectivity between the VPCs
supports inter-region VPC peering connection
uses existing underlying AWS infrastructure
does not have a single point of failure for communication or a bandwidth bottleneck.
VPC Peering connections have limitations
cannot be used with Overlapping CIDR blocks
does not provide Transitive peering
does not support Edge to Edge routing through Gateway or private connection
is best used when resources in one VPC must communicate with resources in another VPC, the environment of both VPCs is controlled and secured, and the number of VPCs to be connected is less than 10
AWS VPN CloudHub allows you to securely communicate from one site to another using AWS Managed VPN or Direct Connect
AWS VPN CloudHub operates on a simple hub-and-spoke model that can be used with or without a VPC
AWS VPN CloudHub can be used if you have multiple branch offices and existing internet connections and would like to implement a convenient, potentially low cost hub-and-spoke model for primary or backup connectivity between these remote offices.
AWS VPN CloudHub leverages VPC virtual private gateway with multiple gateways, each using unique BGP autonomous system numbers (ASNs).
A transit VPC is a common strategy for connecting multiple, geographically disperse VPCs and remote networks in order to create a global network transit center.
A transit VPC simplifies network management and minimizes the number of connections required to connect multiple VPCs and remote networks
Transit VPC can be used to support important use cases
Private Networking – You can build a private network that spans two or more AWS Regions.
Shared Connectivity – Multiple VPCs can share connections to data centers, partner networks, and other clouds.
Cross-Account AWS Usage – The VPCs and the AWS resources within them can reside in multiple AWS accounts.
Transit VPC design helps implement more complex routing rules, such as network address translation between overlapping network ranges, or to add additional network-level packet filtering or inspection.
supports Transitive routing using the overlay VPN network — allowing for a simpler hub and spoke design. Can be used to provide shared services for VPC Endpoints, Direct Connect connection, etc.
supports network address translation between overlapping network ranges.
supports vendor functionality around advanced security (layer 7 firewall/Intrusion Prevention System (IPS)/Intrusion Detection System (IDS) ) using third-party software on EC2
leverages instance-based routing that increases costs while lowering availability and limiting the bandwidth.
Customers are responsible for managing the HA and redundancy of EC2 instances running the third-party vendor virtual appliance
AWS Direct Connect helps establish a dedicated private connection between an on-premises network and AWS.
Direct Connect can reduce network costs, increase bandwidth throughput, and provide a more consistent network experience than internet-based or VPN connections
Direct Connect uses industry-standard VLANs to access EC2 instances running within a VPC using private IP addresses
Direct Connect lets you establish
Dedicated Connection: A 1G, 10G, or 100G physical Ethernet connection associated with a single customer through AWS.
Hosted Connection: A 1G or 10G physical Ethernet connection that an AWS Direct Connect Partner provisions on behalf of a customer.
Direct Connect provides the following Virtual Interfaces
Private virtual interface – to access a VPC using private IP addresses.
Public virtual interface – to access all AWS public services using public IP addresses.
Transit virtual interface – to access one or more transit gateways associated with Direct Connect gateways.
Direct Connect connections are not redundant as each connection consists of a single dedicated connection between ports on your router and an Amazon router
Direct Connect High Availability can be configured using
Multiple Direct Connect connections
Back-up IPSec VPN connection
Direct Connect link aggregation group (LAG) is a logical interface that uses the Link Aggregation Control Protocol (LACP) to aggregate multiple connections at a single AWS Direct Connect endpoint, allowing you to treat them as a single, managed connection.
LAGs need the following
All connections in the LAG must use the same bandwidth.
A maximum of four connections in a LAG. Each connection in the LAG counts toward the overall connection limit for the Region.
All connections in the LAG must terminate at the same AWS Direct Connect endpoint.