There are two sets of keys: one for the inbound connection and another for the outbound connection.Make sure you do the capture before the keys change. You can check how much time is left by running the command: show vpn ipsec sa detail. ![]() The keys are temporal and will be changed on the interval that you specified under the ESP-GROUP for the IPSec VPN connection.This can be done by running the command: set vpn ipsec logging log-modes 'private'Īfter doing that you can retrieve the encryption keys by running the command: ip xfrm state To be able to decrypt the traffic we will have to force the vRouter to publish that information. You will need Wireshark and access to the vRouter console to be able to capture the traffic and to retrieve the encryption keys. While the commands are specific to the vRouter they should also be usable with any OpenSwan and StrongSwan installation on Linux. Today we will see how to decrypt the traffic of a IPSec VPN tunnel on a Brocade vRouter. Well, except if you have an engine that is locked. It is the ultimate tool to look under the hood of the network engine. It does allow you to see what is actually happening at the network level and really helps to understand the problem. ![]() While doing network troubleshooting one of the most useful utilities is tcpdump/Wireshark.
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