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IPSec VPN

Created: Jul 24, 2021 21:21:03Latest reply: Jul 31, 2021 02:45:22 354 3 0 0 0
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Hello

Is it true if my IPSEC VPN with NAT Traversal, i must use IKE Aggressive mode?

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Popeye_Wang
Admin Created Jul 25, 2021 03:09:58

Hi,
There are no restrictions on the IKE exchange mode when NAT traversal is configured.
Instead, it is important to note that the AH protocol cannot be used. Because AH performs an integrity check on data, it will perform a HASH computation for all IP packets within the IP address. NAT, on the other hand, will change the IP addresses, thereby breaking the AH HASH values. As such, AH packets cannot pass through the NAT gateway.
Refer to the following post, which details the principles and configuration of NAT traversal:
https://forum.huawei.com/enterprise/en/nat-traversal-dr-wow-no-36/thread/251509-867
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Nino_Chou
Nino_Chou Admin Created Jul 25, 2021 01:15:11

Hello, friend!
It's nice to meet you in the community.
We're working on getting the right answer for you.
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Popeye_Wang
Popeye_Wang Admin Created Jul 25, 2021 03:09:58

Hi,
There are no restrictions on the IKE exchange mode when NAT traversal is configured.
Instead, it is important to note that the AH protocol cannot be used. Because AH performs an integrity check on data, it will perform a HASH computation for all IP packets within the IP address. NAT, on the other hand, will change the IP addresses, thereby breaking the AH HASH values. As such, AH packets cannot pass through the NAT gateway.
Refer to the following post, which details the principles and configuration of NAT traversal:
https://forum.huawei.com/enterprise/en/nat-traversal-dr-wow-no-36/thread/251509-867
View more
  • x
  • convention：
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chenhui
chenhui Admin Created Jul 31, 2021 02:45:22

Hi,

Does the answer fit your question? Your valuable feedback would help our improvement.


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