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Questions tagged [amazon-nat-gateway]

18 questions
12
votes
1 answer

AWS NAT vs AWS IGW vs AWS Router

As per this answer, router and gateway are same devices, in terms of functionality. In AWS world, we have internet gateway, NAT gateway and router Are these three not the same?
user1787812
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10
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1 answer

Does RDS in private subnet inside AWS VPC need a NAT instance/gateway?

I have hosted an AWS RDS inside the private subnet of the VPC. While creating the VPC with public and private subnets, I had to create a NAT instance. I know NAT instance is mainly for private instances to connect to the internet. Is the NAT…
Neron Joseph
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6
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2 answers

AWS: reduce nat gateway costs for a small system

I am setting up infrastructure for a startup which pretty much will not have a lot of traffic, but should be able to scale when needed. We are favouring a setup with a LB, that distributes traffic to the frontend nodes in a dedicated private subnet…
st-h
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3
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2 answers

AWS VPC: Internet Gateway vs NAT

This and this and this are quite related to my question. Although it seems to have answered quite a lot of people's doubts, I am still struggling to understand if this setup is specific to AWS or in general networking. If its the latter, then I need…
Sheel Pancholi
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2
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2 answers

AWS Nat Gateway - Using a non Elastic IP address

I'm building an AWS VPC network lab via Terraform. I want to add a NAT Gateway in order that my private network instances could access the internet for software updates. From the Terraform spec you can see the an "allocation_id" is a required…
RtmY
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2
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1 answer

NAT gateway for ec2 instances

I have a public subnet with ec2 instnaces. The route table has 0.0.0.0/0 IGW (Internet Gateway) as default. I tested adding a public IP address to my instance (104.27.142.41/32 as reported by curl ifconfig.co) and when I ssh to that ec2 it returns…
tk0221
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2
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2 answers

Source CIDR/IP/Security group setup in Security Groups Inbound Rules

I want to set up security group for an ec2 instance(Linux). There are services running on it like mem cached, python, dhclient, nodejs etc. How do i know which IP/CIDR-block should my server be listening to on a particular port? Eg. if mysqld is…
Aso'K
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2
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1 answer

Using AWS Nat Gateway from diferrent VPC across VPC peering

I would like to use Nat Gateway (not Nat Instance on EC2!) from another VPC to route my traffic from peered VPCs to the Internet. My infrastructure looks like this: /---------------------VPC-LIVECHAT---------------------\ | /---Subnet A---\ …
Ondra Sniper Flidr
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1
vote
1 answer

Can't get CloudFormation AutoScalingGroup to work

I'm trying to create an AutoScalingGroup for EC2. I keep getting the following error: Received 0 SUCCESS signal(s) out of 1. Unable to satisfy 100% MinSuccessfulInstancesPercent requirement The EC2 instance is being created but it is not getting…
JohnPortland
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1
vote
1 answer

how to test if aws nat gateway static ip is up?

I started two EC2 instances in an Elastic Beanstalk autoscaling group in a VPC. The app on these EC2 instances needs to connect to a third party service that uses an IP address whitelist to allow access. So I'm using NAT Gateway to have static IPs…
Magno Ferreira
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1
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0 answers

Migrating from NAT instance to NAT Gateway fails on existing instances

I have a VPC that I created a long time ago before NAT gateways were a thing. Like many setups I created a NAT instance to route outbound traffic. Yesterday my NAT instance crashed. I was able to reboot but it did create a bit of a headache so I…
Cfreak
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3 answers

Instance in private AWS subnet with NAT gateway can't access AWS services

We have an instance within a private subnet that has a managed NAT gateway. On that instance, we are able to access the internet: $ curl https://www.google.com/
JustinHK
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1
vote
1 answer

AWS - Can a Private Subnet reach the Internet only with NAT without Internet Gateway

Question It is possible to access the Internet from a private subnet only with NAT without an Internet Gateway associate with its VPC? Background VPC with public and private subnets (NAT) says below. Just with this sentence, it would be a fair…
mon
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0
votes
1 answer

How to setup a static ip address for outgoing traffic in AWS?

I have a number of EC2 instances in 3 availability zones. The application that I'm running on these instances are communicating with multiple third party applications that have a whitelist mechanism. I know that I'm able to communicate to those…
Kevin
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0
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2 answers

NAT gateway set up doesn't work

I have implemented an environment for a Wordpress website. I have a loadbalncer (ALB) that is connected to an EC2 server plus an AutoScaling group(for failover). As we need to update Wordpress and install some plugins on EC2 server, I need to set…
Matrix
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