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I've been using Sunbelt Personal Firewall v. 4.5 (previously Kerio). I've discovered that blocking Firefox connections in the configuration doesn't stop EXISTING Firefox connections. (See my post here yesterday http://superuser.com/questions/132625/sunbelt-firewall-4-5-wont-block-firefox) The "stop all traffic" may work on existing connections - but I'm done testing, as I need to be able to be selective, at any time. I was using the free version, so the "web filtering" option quit working after some time (mostly blocking ads and popups), but I didn't use that anyway. I used the last free version of Kerio before finally having to go to Sunbelt, because Kerio had an unfixed bug where you'd eventually get the BSOD and have to reset Kerio's configuration and start over (configure everything again).

So I'm looking for a new Firewall. I don't like ZoneAlarm at all (no offense to all it's users that may be here - personal taste).

I need the following: (Sunbelt has all these, except *)

  1. Be able to block in/out to localhost (trusted)/internet selectively for each application with a click (so there's 4 click boxes for each application) [*that effects everything immediately, regardless of what's already connected]. When a new application attempts a connection, you get an allow/deny/remember windows.
  2. Be able to easily set up filter rules for 'individual application'/'all applications,' by protocol, port/address (range), local, remote, in, out. [*Adding a filter rule also doesn't block existing connections in Sunbelt. That needs to work too.]
  3. Have an easy-to-get-to way to "stop all traffic" (like a right click option on the running icon in the task bar).
  4. Be able to set trusted/internet in/out block/allowed (4 things per item) for each of IGMP, ping, DNS, DHCP, VPN, and broadcasts.
  5. Define locahost as trusted/untrusted, define adapter connections as trusted/untrusted.
  6. Block incoming connetions during boot-up and shutdown.
  7. Show existing connections, including local & remote ip/port, protocol, current speed, total bytes transferred, and local ports opened for Listening.
  8. An Intrusion Prevention System which blocks (optionally select each one) known intrustions (long list).
  9. Block/allow applications from starting other applications (deny/allow/remember window).
  10. (Wish list) A way of knowing what svchost.exe is doing - who is actually using it/calling it. I allowed it for localhost, and selectively allowed it for internet each time the allow/deny window came up.

Thanks for any help/suggestions. (I'm using Windows XP SP3.)

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possible duplicate of superuser.com/questions/85412/… –  Mehper C. Palavuzlar Apr 20 '10 at 15:42
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Not a duplicate, I'm not looking for a router, and I don't care about limiting options to OpenSource. –  Carl Apr 20 '10 at 16:35
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3 Answers

I recommend using Comodo. It's great for power users and lets you finely tune all of the options you want, plus it's totally free. Chris recommended Sygate, but unfortunately it hasn't been updated since 2004 and is likely full of bugs.

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+1 for Comodo. I just use the built-in Windows Firewall now, but I loved Comodo because it was so configurable. –  Sasha Chedygov May 1 '10 at 19:55
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Software Firewall: Sygate Personal Firewall 5.6

Hardware Firewall: Pfsense

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Does Sygate do everything above, including stopping existing Firefox connections if I just block Firefox and leave other things having access? –  Carl Apr 21 '10 at 13:48
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Get an old computer put ClearOS (www.clearfoundation.com) on it, set it as a gateway. Connect between router and cable modem. Enjoy your new firewall.

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That might be usefull if I didn't just use a laptop, mostly on the go. –  Carl Apr 20 '10 at 16:32
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how exactly this will block by application? –  Berry Tsakala Apr 17 '13 at 15:08
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