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 ...

If you configure the packet filter to discard all incoming packets in which the ACK flag is set to 0, you can be assured that any connections to your internal severs originated from within your ...

A packet-filtering firewall is typically stateless, a Web Application Firewall (WAF) is typically stateful, a Firewall as a Service (FWAAS) could be either stateful or stateless.

In essence, the differences between the two focus on three main areas: Focus - antivirus focuses on internal threats (virus, malware); firewall focuses on external threats through traffic management ...

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.

Smoothwall is fine and dandy, except NAT is making it more trouble than it is worth.I think my Red Hat install is kernal 2.4.IP chains or IP tables.What is the best way get a bare-bones firewall ...

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.

Packet filtering firewalls justify their namesake by scrutinizing data packets. Using this analysis, they'll either allow or block the packets using predefined rules related to the source ...

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 ...