Web search engines, such as Google and Bing, are great for finding websites.But what if you’re interested in finding computers running a certain piece of software (such as Apache)?Captive Portal Captive portal allows you to force authentication, or redirection to a click through page for network access.
pf Sense is a stateful firewall, by default all rules are stateful.
Most firewalls lack the ability to finely control your state table.
This is most commonly used for site to site connectivity to other pf Sense installations, other open source firewalls (m0n0wall, etc.), and most all commercial firewall solutions (Cisco, Juniper, etc.).
It can also be used for mobile client connectivity.
This is commonly used with web servers, mail servers, and others.
Servers that fail to respond to ping requests or TCP port connections are removed from the pool.VPN pf Sense offers three options for VPN connectivity, IPsec, Open VPN, and PPTP.IPsec allows connectivity with any device supporting standard IPsec.pf Sense has numerous features allowing granular control of your state table, thanks to the abilities of Open BSD’s pf.Redundancy CARP from Open BSD allows for hardware failover.For more information on captive portal technology in general, see the Wikipedia article on the topic.