![]() 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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