firewall_rules_edit.php: Editing an associated NAT rule does not warn the user that changes are not allowed, silently fails
Editing an associated NAT rule does not warn the user that changes are not allowed. The end result is OK -- the rule should not allow changes -- but the user is given no indication that the edit (correctly) was denied or failed.
1. Create a NAT port forward with an associated firewall rule (the default)
2. Edit the resulting firewall rule, make a change (to anything other than descr), click save
3. The change is not saved but it appears to have succeeded, Apply is offered, etc.
On 2.2.x the fields on the firewall rule are all disabled so edits are not possible. The only field that is allowed to be edited is the description field.