00:00While many of today's breaches result from malware being delivered through web browsing
00:04and email accounts, direct penetration through hacking is still a significant issue.
00:10A key control to prevent this is the use of perimeter firewalls.
00:14These come in two forms, personal firewalls and endpoint devices, and enterprise firewalls
00:20to protect business enclaves.
00:22These operate in essentially the same way.
00:25A firewall in its simplest form is designed to mediate access between two computers in
00:30different zones, typical examples being an internal user browsing the internet and a connection
00:36from the internet into an internal business server.
00:39To do this, the firewall has a set of rules which instructs it to either allow or deny
00:44the connection based on various criteria, such as source and destination addresses, source
00:49and destination ports, and so on.
00:52Firewalls can be built into operating systems or can be standalone devices.
00:57Let's start by looking at the firewalls built into Windows and Linux.
01:01Super複数 of these platforms are somewhere else.
01:04As I've mentioned, the firewalls do be built in protection, online techniques.
01:08VSP training for all the different revoluggies can be used due December 2 to a grid.
01:10Now there's a
01:21Goodganoamb Sanders will be intended to have used Internet κα枯-based radio.
01:22Co-coopenezmund for scept on the topic, so what did I mention?
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