![]() the security provided by your router is insufficient or there is no consumer router itfp), a local firewall (same machine as the data) is a big no-no. If you need to setup a high security environment (ie. This feature however is not specific to "application/process based firewalls" but the typical behavior of *any* firewall.Īlso, linux will not open anything and the kitchen sink (by default) - at least not on arch. This is different today, where you're usually behind some integrated router/switch which provides basic packet filtering of incoming traffic (regardless of NAT) windows is/was very vulnerable and there was no difference between WAN and LAN. Personal firewalls provided usable security against ingoing traffic which was significant at the time: there was no packet filtering router and on top of that windows opens a pleathora of ports by default - iow. (It worked in the photoshop case, though -)Ģ. This was especially true on windows and is to a certain degree on linux. ![]() rotate its fingerprint (usually the process name) pretty much at will. This idea is fundamentally flawed, because malicious software on your system can deactivate the outgoing "firewall" anytime resp. Those "firewalls" have *never* actually provided *any* security against outgoing traffic (though it was probably the main reason to use them, because photoshop tried to figure online tha. popular at a time when "internet" meant "dial up with a modem connected to your windows box".ġ. From a teacher that re-uses homeworks since more than a decade assume you refer to "personal firewalls" here (though netlimiter is afaiu predominantly a traffic shaper) which were esp.
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