
Overview
The Secure Internet Access Gateway is a highly available, egress filtering proxy and NAT gateway. The gateway restricts HTTP and HTTPS egress traffic from VPC resources to a whitelisted set of hostnames (FQDN). This solution is effective where traditional IP-based firewalls fall short. Access to package repositories and AWS APIs can be provided to instances in private subnets without granting them broad internet access. The gateway is ideally suited to protect your EC2 instances, AWS Workspaces and even Lambda functions from harmful internet traffic while still providing access to update servers, specific websites and services.
The gateway can operate in explicit and transparent mode. In explicit mode, the instance needs to be provided with the gateway's proxy address. The explicit mode provides more granular control over what application has access to the internet. In transparent mode the gateway is added to the subnet's route table allowing traffic to be filtered on its way out to the internet. No changes to applications on EC2 instances are necessary. The transparent mode is useful in scenarios where an application does not provide an option to define a proxy.
The Secure Internet Access Gateway is powered by the AWS Network Load Balancer (NLB). The gateway can therefore easily be shared with other VPCs in the same region using the VPC PrivateLink feature. Please note that only explicit mode is available when using PrivateLink.
Highlights
- HIGH AVAILABILITY | The gateway can easily be deployed in multiple availability zones for redundancy.
- TRANSPARENT PROXY | Optionally filters traffic in transit without explicit proxy configuration.
- FILTER BY HOSTNAME | Control egress traffic by destination hostname instead of IP address.
Details
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Delivery details
64-bit (x86) Amazon Machine Image (AMI)
Amazon Machine Image (AMI)
An AMI is a virtual image that provides the information required to launch an instance. Amazon EC2 (Elastic Compute Cloud) instances are virtual servers on which you can run your applications and workloads, offering varying combinations of CPU, memory, storage, and networking resources. You can launch as many instances from as many different AMIs as you need.
Version release notes
- Migrated to Amazon Linux 2
- Upgraded Squid to version 4.7
- Implemented improvements to transparent proxy behavior
- Added support for VPC Endpoint Services which allows you to share one Gateway with any number of VPCs
Additional details
Usage instructions
This solution is best deployed through CloudFormation templates. CloudFormation is an Infrastructure as Code (IaC) service provided by AWS which makes it fast and easy to set up complex cloud infrastructures.
The CloudFormation template will output the hostname of the Network Load Balancer (NLB) under Outputs, ProxyAddress. The port for the HTTP proxy is always 3128. On most Linux systems it is sufficient to set the http_proxy and https_proxy environmental variables. The majority of client applications will pick up these variables and configure themselves accordingly.
Please find detailed instructions at http://netcubed-ami.s3-website-us-east-1.amazonaws.com/sinac/v1.0.0/#configuring-applications-to-use-the-proxyÂ
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For paid support, email sales@netcubed.de for further information. Free support is provided via support@netcubed.de . For free support, we do not provide a guaranteed response time, however we do our best to respond to questions within 24 hours Monday through Friday.
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