Hi @Anandha L Ranganathan, Maybe the best solution to debug this issue if you create a deployment and set the Options -> Advanced -> Rollback on failure option to false. In this case the deployment could to be deleted manually on the Cloudformation service of AWS after the debug has been finished. This way you can check the applied CF template, the created events and resources at the Cloudformation service. As I checked the referenced template we only use references for resources when create the Cloudformation template except the public route. The rule is dedicated to allow outgoing connections from the created cbd instance. But probably in your specific network setup that part is not working as we expected, so please check the route table and it's rules. I guess there should be rules that can block the outgoing connections or the Cloudformation reference to wrong gateway and route table in your VPC. "VPC" : {
"Type" : "AWS::EC2::VPC",
"Properties" : {
"CidrBlock" : "10.0.0.0/16",
"EnableDnsSupport" : "true",
"EnableDnsHostnames" : "true",
"Tags" : [
{ "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } }
]
}
},
"PublicSubnet" : {
"Type" : "AWS::EC2::Subnet",
"Properties" : {
"MapPublicIpOnLaunch" : true,
"VpcId" : { "Ref" : "VPC" },
"CidrBlock" : "10.0.0.0/24",
"Tags" : [
{ "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } }
]
}
},
"InternetGateway" : {
"Type" : "AWS::EC2::InternetGateway",
"Properties" : {
"Tags" : [
{ "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } }
]
}
},
"AttachGateway" : {
"Type" : "AWS::EC2::VPCGatewayAttachment",
"Properties" : {
"VpcId" : { "Ref" : "VPC" },
"InternetGatewayId" : { "Ref" : "InternetGateway" }
}
},
"PublicRouteTable" : {
"Type" : "AWS::EC2::RouteTable",
"Properties" : {
"VpcId" : { "Ref" : "VPC" },
"Tags" : [
{ "Key" : "Application", "Value" : { "Ref" : "AWS::StackId" } }
]
}
},
"PublicRoute" : {
"Type" : "AWS::EC2::Route",
"DependsOn" : [ "PublicRouteTable", "AttachGateway" ],
"Properties" : {
"RouteTableId" : { "Ref" : "PublicRouteTable" },
"DestinationCidrBlock" : "0.0.0.0/0",
"GatewayId" : { "Ref" : "InternetGateway" }
}
},
"PublicSubnetRouteTableAssociation" : {
"Type" : "AWS::EC2::SubnetRouteTableAssociation",
"Properties" : {
"SubnetId" : { "Ref" : "PublicSubnet" },
"RouteTableId" : { "Ref" : "PublicRouteTable" }
}
},
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