What Are the Bits of the DH Groups Used by Huawei Cloud VPN?
The Diffie-Hellman (DH) groups determine the strength of the key used in the key exchange process. Higher DH group numbers are usually more secure, but extra time is required to calculate the key.
Table 1 lists the bits corresponding to the DH groups used by VPN.
DH Group |
Modulus |
---|---|
1 |
768 bits |
2 |
1024 bits |
5 |
1536 bits |
14 |
2048 bits |
15 |
3072 bits |
16 |
4096 bits |
19 |
ecp256 bits |
20 |
ecp384 bits |
21 |
ecp521 bits |
![](https://support.huaweicloud.com/intl/en-us/vpn_faq/public_sys-resources/note_3.0-en-us.png)
The following DH algorithms have security risks and are not recommended: DH group 1, DH group 2, and DH group 5.
VPN Negotiation and Interconnection FAQs
- What Devices Can Be Connected to Huawei Cloud Through a VPN?
- What Are VPN Negotiation Parameters? What Are Their Default Values?
- Will an IPsec VPN Connection Be Established Automatically?
- How Do I Configure a VPN on an On-premises Device? (Configuring the VPN on a Huawei USG6600 Series Firewall)
- How Should I Configure an On-premises Gateway When I Use a VPN to Connect to the Cloud?
- Can Huawei Cloud VPN Connect to a Remote Gateway Through a Domain Name?
- How Many Tunnels Does My VPN Connection Have?
- How Do I Allow Specific Servers to Access a VPC Subnet Through a Created VPN Connection?
- Do Huawei Cloud VPNs Have the DPD Mechanism Enabled?
- How Can I Use Security Groups to Prevent ECSs in a VPC From Being Accessed Through a VPN to Implement Security Isolation?
- Will a VPN Connection Be Reestablished After Its Configuration Is Modified?
- Why Cannot I Initiate Negotiation from Amazon Web Services to Huawei Cloud After They Are Interconnected?
- How Do I Configure DPD for Interconnecting with Huawei Cloud?
- What Should I Do If My Firewall Cannot Receive Response Packets from the Huawei Cloud VPN Gateway in the IKE Phase?
- What Should I Do If My Firewall Cannot Receive Response Packets from the Huawei Cloud VPN Subnet?
- What Are the Bits of the DH Groups Used by Huawei Cloud VPN?
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