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Multitenant Subnet Resources
VPC
| Name | cornell-shared-vpc |
|---|
Subnets
There is one private Subnet for each AZ.
| Name cit:Name | cornell-shared-vpc/private-use1-azN | Identifies the subnet as belonging to the cornell-shared-vpc and further in which AZ it resides. Note the use of AZ IDs (which are consistent across accounts) not AZ names (which are not consistent across accounts). |
|---|---|---|
| cit:nat-gateway-public-ipv4-address | varies | This is the public IP address that is attached to the NAT Gateway servicing this private subnet. This Public IP address will remain unchanged for the life of the subnet. |
| cit:subnet-type | private-mulitenant | Identifies the subnet as belonging to the Multitenant Subnets offering. |
Route Tables
There is one Route Table for each AZ.
| Name cit:name | cornell-shared-vpc/private-use1-azN | Identifies the route table as belonging to the cornell-shared-vpc and further the AZ which it serves. Note the use of AZ IDs (which are consistent across accounts) not AZ names (which are not consistent across accounts). |
|---|---|---|
| cit:az-id | use1-azN | AZ served by the route table. |
Network ACLs
A single Network ACL serves all the subnets.
| Name cit:name | cornell-shared-vpc/baseline | Identifies the Network ACL as the Cornell baseline NACL. See Baseline AWS Network ACL. |
|---|
What You Won't See
NAT Gateways
The NAT Gateways used by the Shared VPC offerings are not visible from customer AWS accounts. However, the Route Tables that are visible do properly show which NAT Gateway they use. Due to this lack of visibility, we have provided tagging on private subnets that shows the public IP address for the NAT Gateway used by that subnet. Traffic to the internet from a subnet will appear to be coming from that IP address.
These are the the NAT Gateway public IP addresses used by the Shared VPC offerings. These will remain fixed.
| Availability Zone | NAT Gateway Public IP Address |
|---|---|
| use1-az1 | 75.101.192.203 |
| use1-az2 | 34.230.123.26 |
| use1-az3 | 54.205.225.30 |
| use1-az4 | 35.173.86.238 |
| use1-az5 | 44.211.111.35 |
| use1-az6 | 18.210.42.171 |