GUARDDOG FIREWALL PDF

No big changes since the last release candidate. A big thanks to everyone who has helped out with development. Sorry for the inconvenience, my KDE 2 machine is off-line at the moment which has made testing a bit tricky. There are quite a lot of bugs fixes in this release, including some important ones.

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This guide provides a few basic concepts for using Guarddog as a local firewall. Firewall Background A firewall is, at its simplest level, software that allows or disallows network communication. You may wonder why you need such a device and the answer is quite simple; security.

Often computers have communication paths ports open to allow things like printing, Instant Messaging, and Web browsing. This is typically needed and wanted by most people; however, it is also a key method hackers use to gain access into your computer. If you disallow ports which you do not need it limits the options that hackers can use to get into your computer. There are many more reasons for why you would want a firewall and what firewalls are but this guide is about using a firewall, not justifying ;- Installation Please see the Installing Guarddog in Ubuntu You can alter the shortcut that launches guarddog by prefacing it with "gksu" which will prompt you for admin password on startup or launch guarddog from the command line with "sudo guarddog".

Basic Setup The first thing you will want to do in guarddog is ensure it is active. To do this, go to the Advanced tab and ensure "Disable firewall" is unchecked. I also prefer to turn on check the "Show advanced protocol help" and turn off all logging go to the Logging tab and uncheck "Log blocked packets" and uncheck "Log rejected packets".

Try going to adercon. One thing to note: if the above does not allow you to access adercon. To do this go to the Advanced tab and use the Export Additional Network Zones I often need different "rules" for different locations. Guarddog has "Network Zones" which allow you to create rules that behave differently depending on the Zone. Each Zone allows me to define a set of computers and then create rules for those computers as a group. As an example of the above, take the "Home Network" zone.

I define a set of computers on my home network by IP, subnet, domain, etc in the Zone. Its important to note that the "Local" zone is not your local network rather it is your local computer. This can be used to open ports locally say a local webserver and also disable local ports.

It can be helpful to enable logging in guarddog Logging tab, check log blocked and rejected packets. You can then view dmesg to see what port s are being blocked. Simply add a rule that allows traffic on this port and you should be fine. Summary A local firewall is a very useful device in securing your computer.

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