Error message-1: could not find acceptable proposal / no proposal chosenĮrror message-2: Incorrect pre-shared keyĮrror message-3: Ike_invalid_payload, Ike_invalid_cookie.It is also when using this command you will in most cases see the various error messages that can appear depending on the problem with the tunnel.
When troubleshooting IPsec tunnels there is primarily a console command called “ikesnoop” (with verbose mode) that you will use in order to see the negotiations between the initiator and terminator. These messages can be pretty cryptic, this guide is meant to help understanding the most common error messages and how you can troubleshoot them. There are a lot of different error messages you can get when trying to set up or troubleshoot an IPsec tunnel.
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