As per request, I've changed firewall.rb, instead.
But any valid chain name is allowed.
-For the values ACCEPT, DROP, and REJECT, you must use the generic
+For the values ACCEPT, DROP and REJECT you must use the generic
'action' parameter. This is to enfore the use of generic parameters where
possible for maximum cross-platform modelling.
##### `reject`
-When combined with action => "REJECT" you can specify a different icmp
+When combined with jump => "REJECT" you can specify a different icmp
response to be sent back to the packet sender.
##### `log_level`