Creating a VPN Gateway

Scenarios

To connect your ECSs in a VPC to your on-premises network, you must first create a VPN gateway.

Procedure

1. Log in to the management console.
2. Click in the upper left corner and select the desired region and project.
3. On the console homepage, under Network, click Virtual Private Network.
4. In the navigation pane on the left, choose Virtual Private Network > VPN Gateways.
5. On the VPN Gateways page, click Create VPN Gateway.
6. Configure the parameters as prompted and click Next. For details about the VPN gateway parameters, see Table 1.

   Table 1 VPN gateway parameter description

   Parameter	Description	Example Value
   Region	Regions are geographic areas that are physically isolated from each other. The networks inside different regions are not connected to each other, so resources cannot be shared across different regions. For low network latency and quick resource access, select the region nearest to your target users.	N/A
   Name	The name of the VPN gateway	vpngw-001
   VPC	The name of the VPC that the VPN connects to	vpc-001
   Type	The VPN type IPsec is selected by default.	IPsec
   Billed By	A pay-per-use VPN gateway can be billed by bandwidth or by traffic. Bandwidth: You specify a maximum bandwidth and pay for the amount of time you use the bandwidth. Traffic: You specify a maximum bandwidth and pay for the total traffic you generate.	Traffic
   Bandwidth (Mbit/s)	The bandwidth (Mbit/s) of the VPN gateway. The bandwidth is shared by all VPN connections created for the VPN gateway. The total bandwidth size of all VPN connections created for a VPN gateway cannot exceed the VPN gateway bandwidth size.	100

   Table 2 VPN connection parameter description

   Parameter	Description	Example Value
   Name	The VPN connection name	vpn-001
   VPN Gateway	The name of the VPN gateway used by the VPN connection	vpcgw-001
   Local Subnet	The VPC subnets that will access your on-premises network through a VPN Select subnet: Select the subnets that will access your on-premises network through a VPN. Specify CIDR block: Enter the CIDR blocks that will access your on-premises network through a VPN. NOTE: CIDR blocks of local subnets cannot overlap.	192.168.1.0/24, 192.168.2.0/24
   Remote Gateway	The public IP address of the gateway in your on-premises network. This IP address is used for communications with your VPC.	N/A
   Remote Subnet	The subnets of your on-premises network that will access a VPC through a VPN The remote and local subnets cannot overlap with each other. The remote subnet cannot overlap with CIDR blocks involved in existing VPC peering, Direct Connect, or Cloud Connect connections created for the local VPC. NOTE: CIDR blocks of remote subnets cannot overlap.	192.168.3.0/24, 192.168.4.0/24
   PSK	The pre-shared key, which can contain 6 to 128 characters PSKs configured at both ends of a VPN connection must be the same.	Test@123
   Confirm PSK	Enter the pre-shared key again.	Test@123
   Advanced Settings	Default: uses default IKE and IPsec policies. Custom: uses custom IKE and IPsec policies. For details about the policies, see Table 3 and Table 4.	Custom

   Table 3 IKE policy

   Parameter	Description	Example Value
   Authentication Algorithm	The hash algorithm used for authentication, which can be SHA1, SHA2-256 (default), SHA2-384, SHA2-512, or MD5	SHA2-256
   Encryption Algorithm	The encryption algorithm, which can be AES-128 (default), AES-192, AES-256, or 3DES 3DES is not recommended because it is not strong enough to protect data.	AES-128
   DH Algorithm	The Diffie-Hellman key exchange algorithm, which can be Group 2, Group 5, or Group 14 The default algorithm is Group 14. DH algorithms configured at both ends of a VPN connection must be the same. Otherwise, the negotiation will fail.	Group 14
   Version	The version of the IKE protocol, which can be v1 or v2 The default version is v2.	v2
   Lifecycle (s)	The lifetime of the SA, in seconds. The SA will be renegotiated if its lifetime expires. The default lifecycle is 86400 seconds.	86400

   Table 4 IPsec policy

   Parameter	Description	Example Value
   Authentication Algorithm	The hash algorithm used for authentication, which can be SHA1, SHA2-256 (default), SHA2-384, SHA2-512, or MD5	SHA2-256
   Encryption Algorithm	The encryption algorithm, which can be AES-128 (default), AES-192, AES-256, or 3DES 3DES is not recommended because it is not strong enough to protect data.	AES-128
   PFS	The perfect forward secrecy (PFS), which is used to configure the IPsec tunnel negotiation The PFS algorithm can be DH group 2, DH group 5, or DH group 14. The default algorithm is DH group 14.	DH group 14
   Transfer Protocol	The security protocol used for IPsec to transmit and encapsulate user data, which can be AH, ESP, or AH-ESP The default protocol is ESP.	ESP
   Lifecycle (s)	The lifetime of the SA, in seconds. The SA will be renegotiated if its lifetime expires. The default lifecycle is 3600 seconds.	3600

7. Confirm the VPN gateway information and click Submit.