In correlation with the end of life (EOL) for MKE 3.4.x, maintenance of this documentation set was discontinued as of 2023-APR-11. Click here for the latest MKE 3.x version documentation.

Enable ESP traffic

For overlay networks with encryption to function, you must allow IP protocol 50 Encapsulating Security Payload (ESP) traffic.

If you are running RHEL 8.x, Rocky Linux 8.x, or CentOS 8, install kernel module xt_u32:

sudo dnf install kernel-modules-extra