Should i use vpc

Do you allow traffic in and out of each of your VPCs? You can certainly do just that, but how comfortable are you with having multiple egress or ingress points to your environment?

The diagram below shows a full mesh of VPCs again, this time adding a red line for an Internet connection and a connection back to your on-premises data center.

AWS provides a Web Application Firewall, which is nice, but some corporations will require something more than that. On the flip side, some companies require things like content filtering for all outbound Internet traffic. Does it make sense to deploy content filtering solutions in each of your VPCs, or should you centralize it in a single place, like a Transit VPC? The hub spoke model allows us to funnel all of our traffic through the Transit where a firewall or other device might be able to take action on the traffic.

A drawback to using a Transit VPC is costs. In addition to the EC2 costs, you might also need to purchase a license from Cisco, Aviatrix, etc. These costs are pretty easy to calculate, once you size your instances appropriately. A more difficult cost consideration is around your network traffic.

In the diagram below left , you can see how this works with a single VPC directly accessing the Internet. On the right side, you can see what happens to egress costs when you have a transit VPC instead. One other cost consideration is your VPN tunnels. VPS in the other hand is great when your EC2 instances have to access your local network, then you can establish a VPN connection between your VPS and your local network , controlling the IP range, sub networks, routes and outgoing firewall rules, which I think is not what you are looking for.

I think You will be paying for that server per hour. The VPN server is something you can easily set on old hardware very cheap and even free for open source solution.

I don't think it is the best cost-effective option but that just my opinion. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow.

Learn more. Asked 9 years, 3 months ago. Active 2 years, 5 months ago. Viewed 35k times. Improve this question. The original "best answer" to this question is no longer valid since amazon EC2 instances are automatically assigned a new VPC or require you to choose which VPC you want it on. Given that Amir pointed out that Amazon was going to go in this direction, his answer should warrant the best now in my opinion.

And now Amir's answer is nowhere to be found. Add a comment. Active Oldest Votes. Improve this answer. Community Bot 1 1 1 silver badge.

Christopher Christopher I hear people say, oh you can make mistake in configuring security group. Stewie, It's true that security groups can do those things. For example, block a specific IP from hitting your public webserver. Also, I would not discount layered-security so easily. Sure you can make mistakes anywhere, but in EC2 the public internet is only one mistake away, while in VPC you'd need several.

Yes, you can't deny IP, but there are different ways you can mimic that feature at the instance level; IP tables, mod security, thirdparty IPS etc. Why do you want to mimic the traditional environment when you already made a switch to cloud? According to me VPC is for someone who need a backward compatible system for psychological benefit. I need VPC so I can easily extend our local network into the cloud. Here, you have two options:. EIPs are used for public Internet access to:. VPCs use security groups to provide stateful protection the state of the connection session is maintained for instances.

AWS describes security groups as virtual firewalls. You can use VPC to configure other common networking services such as:.

Per Amazon, security and compliance is a shared responsibility between AWS and its customers. The shared responsibility model lays out who is responsible for specific issues when you experience AWS downtime, security breaches, or loss of business.

It is important to understand these limits as you set up your VPC configuration. Consult the shared responsibility model for more information. Cost reduction is one of the main reasons for moving to the cloud. Get insight into the right steps to take for migrating workloads to the cloud and reducing costs as a result.

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