You should install this package in any case, but especially if:
– You want to take advantage of the installed RAM to speed up the connection tracking.
– On the LAN there are VoIP applications that use SIP or H323 protocols. In fact, these protocols require to be tracked to be correctly forwarded in the case the NAT is active.
– You notice a high load average of the system when the Firewall is processing a large number of TCP/UDP connections. This could be due to DDoS attacks or the presence of P2P traffic.