How Many Bits Do the DH Groups Used by Huawei Cloud VPN Have?
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 more time is required to calculate the key.
Table 1 lists the number of 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 |
256 bits (ECP) |
20 |
384 bits (ECP) |
21 |
521 bits (ECP) |
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?
- Is an IPsec VPN Connection Automatically Established?
- How Do I Configure a VPN on an On-premises Device? (Example of Configuring VPN on a Huawei USG6600 Series Firewall)
- Does Huawei Cloud VPN Support Interconnection with a Customer Gateway Through a Domain Name?
- How Many Tunnels Does My VPN Connection Have?
- How Do I Allow Specific Hosts to Access a VPC Subnet Through a Created VPN Connection?
- Do Huawei Cloud VPNs Have the DPD Function Enabled?
- How Can I Use Security Groups to Prevent VPN Access to Some ECSs in a VPC to Implement Security Isolation?
- Will a VPN Connection Be Re-established 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 Interconnection with Huawei Cloud?
- What Should I Do If My Firewall Cannot Receive Response Packets from the Huawei Cloud VPN Gateway in IKE Phase 1?
- What Should I Do If My Firewall Cannot Receive Response Packets from a Huawei Cloud VPN Subnet?
- How Many Bits Do the DH Groups Used by Huawei Cloud VPN Have?
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