What are the pros and cons of using an additional firewall in Windows XP? I thought of doing this for extra protection but need some opinions from others because I am not familiar with the subject
For the past three+ years I have used a software firewall (Agnitum Outpost Firewall 2009) and the hardware firewall on my MikroTik router (SPI & NAT). I would credit the latter for making my XP bulletproof. That said, Agnitum has alerted me to surreptitious outbound connections that SterJo Netstalker missed, and allowed me to block those attempts from BleachBit, CCleaner, etc. A software firewall and hardware firewall is perfectly compatible. Two software firewalls will most likely conflict.
Yes, I have observed (ie been notified by firewall) just how frequently apps try to autonomously access the web. Expected following a log-on, if I have opted to allow them to automatically check for updates, but they are attempting web access far more frequently than that, without any action on my behalf to initiate such comms. Totally unknown to me why they are phoning home with such frequency: are they all spying on their customers?
Worst offender by far is HP printer support software, drivers etc, which I have pruned to bare minimum as there was obviously a lot of bloat.
Yeah, inbound connections are not the only thing to watch out for these days. Way too many apps have decided to imitate M$ in its love of 'phone-home' spyware, requiring one to also monitor outbound connections, and ball-gag the lil gossipers when needed. Any firewall you pick absolutely needs to be able to monitor both incoming and outbound connections, and silence either/or.
Amazon has a ton of complaints in the reviews on most all HP printers (regarding its embedded spyware), and even though it is THE preferred brand for Linux, that alone was quite enough for me to pass on that brand.