I've enhanced the RN and the Considerations entry. Eric ACK'ed it on IRC.



== RHEL 8.6 deprecation release note:

.The unsupported `xt_u32` module module is now deprecated

Using the unsupported `xt_u32` module, `iptables` users can match arbitrary 32 bits in the packet header or payload. With RHEL 8.6, the `xt_u32` module is deprecated, and will be removed in RHEL 9.

If you use `xt_u32`, migrate to the `nftables` packet filtering framework. For example, first change your firewall to use `iptables` with native matches to incrementally replace individual rules, and later use the `iptables-translate` and accompanying utilities to migrate to `nftables`. If no native match exists in `nftables`, use the raw payload matching feature of `nftables`. For details, see the `raw payload expression` section in the `nft(8)` man page.



== Entry for the "Considerations in adopting RHEL 9" title:

.The unsupported `xt_u32` Netfilter module module has been removed

RHEL 8 contained the unsupported `xt_u32` module, which enabled `iptables` users to match arbitrary 32 bits in the packet header or payload. This module has been removed from RHEL 9. As a replacement, use the `nftables` packet filtering framework. If no native match exists in `nftables`, use the raw payload matching feature of `nftables`. For details, see the `raw payload expression` section in the `nft(8)` man page.

I've added the final RN to the Doc Text field and the text for the  "Considerations" title to the corresponding branch: https://gitlab.cee.redhat.com/red-hat-enterprise-linux-documentation/rhel-8-docs/-/commit/be4882d9e4e34b7c420bcb1b391f7eee8ea2fb1f

Published to Portal: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8-beta/html-single/8.6_release_notes/index#BZ-2061288