Troubleshoot VPN, Help me, Please
I had VPN site to site between HCM and Singapo
HCM : Fortigate 80C
Singapo : Cisco 2900
Before,no problems.
Today, I can't ping from ip private of Singapo ( 192.168.4.0/24 ) to ip private of HCM (192.168.1.0/25). ->>> 0/5
But, If I ping from HCM - > Singapo, after that Singapo ping HCM was succeed.
I had file config of Cisco and Fotigaer.
Can u help me :(
Thanks a lot
Hi Mr. JinSin,
That is great, basically an issue with Phase 2, just a little explanation on that, you might already know about it:
Perfect Forward Secrecy (PFS) to generate and use a unique session key for each encrypted exchange.
The unique session key protects the exchange from subsequent decryption, even if the entire exchange was recorded and the attacker has obtained the preshared and/or private keys used by the endpoint devices
Select the required Diffie-Hellman key derivation algorithm from the Modulus Group list box.
Security Manager supports Diffie-Hellman group 1, group 2, group 5, and group 7 key derivation algorithms. Each group has a different size modulus:
•Group 1 (the default): 768-bit modulus.
•Group 2: 1024-bit modulus.
•Group 5: 1536-bit modulus.
•Group 7: Use when the elliptical curve field size is 163 characters
Please don't forget to rate and mark as correct the helpful post!
If you have another issue let me know!
David Castro
Regards,
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