Installing FireHOL 3.0.1 on a modern kernel (4.4.10) will yield the following build warnings: * CONFIG_NF_CONNTRACK_ENABLED: is not set when it should be. * CONFIG_IP_NF_TARGET_LOG: is not set when it should be. * CONFIG_IP_NF_TARGET_ULOG: is not set when it should be. These options no longer exist so their messages are misleading/obsolete. I sent an email to the maintainer and they said that these were kept for compatibility reasons but should be removed. Making this bug report as a tracker for this removal.
Fixed in firehol-3.0.1-r1.