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Hi, I need to configure a GRE over IPsec tunnel between a RUT240 and a Cisco 2800 Router. I configured the GRE tunnel and it worked great. When I tried to secure it with IPSec it doesn't work. I checked the phase 1 and 2 parameters and it is matching, but the IPsec doesn't pass the phase 1.

Does anyone know if the RUT240 supports GRE over IPsec? If so, it works with Cisco routers?

I would appreciate if someone could help me with this configuration issue.

Best regards.
There are many ways to do this.

Which way are you trying?

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GRE over IPSec is supported, but could you please paste some of your configuration screenshots, so I could clearly see how you configured IPSec and GRE instances?