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I am unable to get TCPDUMP to decrypt VPN packets for troubleshooting purposes. I manage both ends of the tunnel and have all required information (SPI, remote peer ip, enc, ...
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- 01-06-2008 #1
- Join Date
- Jan 2008
Tcpdump -E (VPN) question
I have tried several combinations including the following:
-E "email@example.com 3des-cbc:12345"
If above is correct, please please answer the following questions:
1. SPI-is this hex or ascii?
2. Where can I get a list of supported encryptions and their syntax? The MAN page is incomplete. Ive seen 3DES written like DES3, 3DES-cbc, 3DES, DES3-CBC.
3. Preshare-Is this ascii or hex?
4. Are the quotes required
If the above syntax is incorrect, I would greatly appreciate the corrected syntax.
Thanks in advance for your assistance.