AWS ELB : Listener : Rules: Multiple Ports

AWS ELB when target (backend) applications runs on multiple ports of the same EC2

https://stackoverflow.com/questions/54915981/aws-elb-when-target-backend-applications-runs-on-multiple-ports-of-the-same-ec/54917808#54917808

https://docs.aws.amazon.com/elasticloadbalancing/latest/application/listener-update-rules.html

Multi Tabbed SSH Terminal : https://mobaxterm.mobatek.net/download-home-edition.html

https://mobaxterm.mobatek.net/download-home-edition.html

AWS : When to use Public IPs : AWS Reachability Troubleshooting

Always Remember

• If AppServer Application access is req., We will use LB/GW

• If Actual Server itself if req., We should use
• Private VPN Connection with that (1st priority)
• Public IP and Place it in - Public Subnet having Internet Gateway (2nd Priority)

AWS : Direct Connect

https://docs.aws.amazon.com/directconnect/latest/UserGuide/Welcome.html

Elastic IP Address : Delete /Disassociate

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/elastic-ip-addresses-eip.html

https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Scenario4.html

1st Disassociate Elastic IP Address

then Release Elastic IP Address

if Elastic IP is not bound, its chargeable

AWS Routing : 101

https://medium.com/@mda590/aws-routing-101-67879d23014d

https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Scenario4.html

https://karanawsbucket.s3.us-east-1.amazonaws.com/Documents/AWS%20Routing%20101.%20Introduction%20_%20by%20Matt%20Adorjan%20_%20Medium.pdf

User Data :AWS : 80 : WebPort

https://gist.github.com/nktstudios/fcaf50c30f4ce50790876a3fe5dd8ac7

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#!/bin/bash # update the machine yum update -y # install http yum install -y httpd.x86_64 # start the service systemctl start httpd.service # enable service across reboots systemctl enable httpd.service # create the html page to render echo "<h1>Hello World from NKT Studios!</h1>" >/var/www/html/index.html