Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
SDN 101: An Introduction to Software Defined Networking
Discover the advantages of SDN.
SDN has quickly become one of the hottest trends in IT. But not all SDN solutions offer real software-defined functionality. As more enterprises consider SDN, they want to know, “What is SDN? And what are the real benefits?” If you're ready to explore the advantages of SDN, and want to know how it should be implemented within your enterprise, start by reading our introductory white paper.
Click Here to receive this Complete Guide absolutely free.
Firewalls are pretty important for keeping your system secure, it's a big International Network out there. Could someone tell me how the Linux firewall works, be it through the Linux kernel PPP interface, iptables, ipchains, etc. Can it be configured so that application x (e.g. an internet browser) is allowed send and receive through a certain port - and only that port? And all other access, be it by that application or other applications is denied? Or does it have general rules and makes guesses on what is and isn't allowed access?
Could someone point me to an application - Qt or GTK+ coded, preferably Free - that offers this functionality. I use many applcations, and often install new ones, so a little dialog that would appear notifying me of access or a request to access, giving the option to permit or deny and further define a rule (e.g. port) would be useful. Manually editing iptables configuration files, typing in and out of root mode, would be frustrating and would require more reading and learning than I would prefer.
I know I could just check FreshMeat.net, but asking fellow Linux users who have used the app in question and have tried other applications seems better in this case.
Note the capital in Free, acid_kewpie. By Free I mean licenced under the GPL (General Public Licence) which allows me to copy, modify and examine the source code of the program in question (given any changes are submitted to the community, who own the code), therefore ensuring my freedom. What, you didn't know this?? I suspect you're "not used of Linux yet"... as Linux, the GPL and Free Software are so closely linked.
Free as in 'free' could mean just being able to download the app, binary only, use it all you wish but are deprived of the privilages outlined above with Free software. It's a big difference. You could call Microsoft's Internet Explorer "free" software...
Anyway... does anyone want to post some screenshots of their favourite firewall in action so I can see if it meets my requirements?
BTW, I asked specifically because firewalls are the kind of software that are pretty essential and easy to market, like anti-virus software (of course anti-virus software doesn't apply to Linux users... yet).
stop talking crap, that's exactly what i meant, at least 95% of software in use under linux is released via the GPL (or GPL2 or LGPL), capital first letter or not . you seriously think i don't know what the GPL is????
if you want screenshot of apps jsut go to there homepage. you do know what a home page is......? and a search engine...? super.
Right kewpie stop with the slaggin! Let's forget about the Free/free thing, okay?
I'd prefer to get screenshots from the readers of the forum because often the screenshots on sites are limited and of outdated versions (though the fwbuilder.org ones aren't).
What I'm looking for is a dialog window that appears whenever there is a request for access that isn't defined (i.e. permitted or denied), and asks me what I want to do. This is how Tiny Personal Firewall for windowS operates, and I find it effective; easy-to-use but can keep your system very secure, by not just making guesses on ports, addresses, etc. fwbuilder doesn't appear to operate like this. Any other suggestions apart from fwbuilder? fwbuilder does seems like a pretty good firewall, and it's probably what I'll choose, but I'd like to see what others there are.
firestarter just try it. it runs under kde but was designed for gnome just like it says on firestarters website. u can have it run in your system tray. by having it run in your system tray it will tell u when your getting hits. just try it. works great.
here http://www.schrock321.com/snapshot2.png a shot of my firewall running. look at the bottom right hand corner of the image. there is a blue dot on the taskbar. when that blue dot turns into a red image it means u got a hit.
acid_kewpie helps alot of people around here i would show him a little more respect if i were you