Kerio Tech Firewall6 - Manual (Page 232)

Chapter 17 Advanced security features
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Connections count limit is useful especially when a local client host is attacked by a worm
or Trojan horse which attempts to establish connections to larger number of various servers.
Connection count limits protects the firewall (the WinRoute host) from flooding and it can
reduce undesirable activities by worms and Trojan horses.
Note: This feature does not limit number of connections coming in from the Internet (such as
access to mapped services). Limiting of number of connections to a service would increase risk
of so called DoS attack (overloading of a service by establishing of large number of concurrent
connections).