Windows Firewall Control offers four filtering modes that can be adjusted with a single click – High Filtering, Medium Filtering, Low Filtering, and No Filtering.

Learn how firewalls have progressed from simple packet filtering to more sophisticated application-level filtering. Webopedia.com defines a firewall as “a system designed to prevent unauthorized ...

Application layer filtering (ALF) firewalls do a more thorough job of filtering, examining not just packet headers but also the contents of the packets. However, that slows them down.

Hardware firewalls are integrated into the router that sits between a computer and an Internet modem. They typically use packet filtering, which means they scan packet headers to determine their ...

For instance, a packet filter can be used to block all incoming connections that did not originate from inside the network. The trick lies in looking at the ACK flag of the IP header.

Cisco firewalls had this pseudo-statefulness for a while, but I think it's been fixed now. <P>Ipf has nice stateful capabilities, and is a really nice firewall package in general.

Most popular firewalls, such as Microsoft Proxy Server 2.0, Network Ice’s ICEpac, and the leading UNIX solutions, use dynamic packet filtering. Allowing VPN traffic ...

I'm tired of messing with FreeBSD an Linux trying to get a packet filtering firewall going.<P>So until I figure out anything better, I'll give w2k a whirl. <P>Microsoft has proxy server 2.0, but I ...

OS X’s Firewalls All versions of OS X through 10.4 (Tiger) have included a Unix-based firewall called ipfw. In security parlance, ipfw is a packet-filtering firewall: it checks each packet ...