I would like a firewall for my company but I'm running a unix server with windows computer hooked up to it(running a terminal emulator to work with the unix). I cannot use 198 ip #'s. I would like to create anouther computer with linux and change th ip of the router so one computer sees it and ports it to everyone else(the linux machine). heres my problem. I have very little knowledge of linux but have used it and done some work with the program. How would I axxcess the other unix server? and is it worth it to port to one computer and allow axcess to the the network when the router is part of the network but under different ip address. Could someone see the internal net even if the network cannot see the dsl bridge? this sounds confusing but from what i'm reading that seems to be the theme here. or just install black ice defender on the windows program...
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need firewall and have dsl router. most systems is win 2
- Thread starter tipifire
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You don't complain when the service is free, friend.
The simple answer to your question is you need to learn a bit more about NAT (network address translation), or in the Linux world, IP Masquerading. This post: thread619-41784 , will show a sample of what we are talking about. A good simple guide to doing this in Linux is at
NAT can be used in a variety of ways. It allows a server to transmit data from one IP address (Ethernet card A) to another address (Ethernet card B), allowing multiple computers access to the web through a single IP address, for example.
You are not restricted to using 192.168.xxx.xxx or 10.x.x.x addresses, but these are intended for internal networks and can never be accessed from the internet in general, so they provide a certain degree of protection. Along with this protection, you can add firewall rules to allow or disallow certain protocols, IP addresses, etc...
You can do this with Linux, but if you are serious about security, you should look at FreeBSD or OpenBSD. Either way, this is much more secure than a Windows firewall.
The simple answer to your question is you need to learn a bit more about NAT (network address translation), or in the Linux world, IP Masquerading. This post: thread619-41784 , will show a sample of what we are talking about. A good simple guide to doing this in Linux is at
NAT can be used in a variety of ways. It allows a server to transmit data from one IP address (Ethernet card A) to another address (Ethernet card B), allowing multiple computers access to the web through a single IP address, for example.
You are not restricted to using 192.168.xxx.xxx or 10.x.x.x addresses, but these are intended for internal networks and can never be accessed from the internet in general, so they provide a certain degree of protection. Along with this protection, you can add firewall rules to allow or disallow certain protocols, IP addresses, etc...
You can do this with Linux, but if you are serious about security, you should look at FreeBSD or OpenBSD. Either way, this is much more secure than a Windows firewall.
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ok did some looking and reading. whats the different in freebsd and openbsd? (i havn't gone to the web site yet, but will to see how i can config drivers). but always thought linux was the best??????? and the thread rycamor gave i read. thats what gave me the idea. I have win 2000 now but i don't trust it. And have worked with windows long enough to know better.... Will go home and read. Sad enough my laptop gave out so i'm not able to experiment at home. <--- i think i'm having a bad computer week. Thank you very much for the info...... Tipifire
Don't get me wrong; Linux is great, it's cutting-edge, dynamic and all that, and has some real advantages, but the *BSDs have a legacy (from THE original AT&T/Berkeley Unix) of being just a little stabler, maybe a little slower to adopt new standards, etc...
Linux is usually a bit more fun, especially for a workstation, but if you browse the vulnerability reports, the *BSDs (NetBSD, OpenBSD, and FreeBSD) seem to have fewer vulnerabilities than just about any OS. They are a bit harder to learn, though. You will be forced to actually learn how a Unix system works.
Linux is usually a bit more fun, especially for a workstation, but if you browse the vulnerability reports, the *BSDs (NetBSD, OpenBSD, and FreeBSD) seem to have fewer vulnerabilities than just about any OS. They are a bit harder to learn, though. You will be forced to actually learn how a Unix system works.
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i have to learn here. i was a oem builder and repair to system admin and the server is aix(unix ibm). it took me first two months to get all the computers set and operating well. I know linux a little just lack experience and playing time. I want to take my computer and change it from a w2k to linux or unix based. i did some research on the bsd. the bsd's are talking about motherboards that i consider a little out of date(but then after every 8 months everything is right?). But not done reading reseaching yet.
i was going to sujest you find the trinityOS project and read trough it. I am new to all of this I just built my first computer 1 month ago and never turned one on untill 2 years ago and after reading that guys setup and comparing what i had and then reading how to's I set up my home network I feel like I could figure out anything now haha NOT! but in my opinion that would be the way to go.but then I am a newbie so dont take my word for it. it just feels like I have absorbed quite a bit from reading it
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this is the website i think your talking about. Got good stuff and a web ring.......also try this But right its looking like free and open BSD does not support my puny m748 pchips board
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tipfire -- how did you find that FreeBSD will not support your motherboard? AFAIK the *BSDs will run on just about any x86 compatible motherboard. I've never had a problem, even with the newest, or with the weirdest slapped-together-out-of-used-parts system. They may not be able to use every extended option of the motherboard, but the base x86 architecture is pretty standardized.
The easiest way to find out is to download and run the install boot floppies. They will tell you right away if there is a problem.
The easiest way to find out is to download and run the install boot floppies. They will tell you right away if there is a problem.
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aye was just reading on the faqs on what it will support. But like i'm done reasearching yet. I know nothing of freeBSD right. And thew way it was telling me,i had a idea of older tech only. So far. But i figure i mention it and see what the response was....... Hope eveyone is staying warm. Its gonna be a long two months
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Yes the *BSD people are not always so great at PR, and their websites are kind of non-intuitive, so one often gets the idea that BSD is for some ancient hacker who refuses to part with beat-up old hardware ;-).
But Slashdot.org posted a story at about a FreeBSD machine running on a nicely high-powered modern PC that set a new record for files served in one day. (Believe it or not, it served 2 Terabytes of downloads in one day) Try that, Win2000.
But seriously, if you want to use FreeBSD as a firewall, there are a couple of things you have to do which might seem a little difficult, but having just gone through it several times, I will be glad to give you the exact sequence if you want, and it can be done in just a couple of hours.
But Slashdot.org posted a story at about a FreeBSD machine running on a nicely high-powered modern PC that set a new record for files served in one day. (Believe it or not, it served 2 Terabytes of downloads in one day) Try that, Win2000.
But seriously, if you want to use FreeBSD as a firewall, there are a couple of things you have to do which might seem a little difficult, but having just gone through it several times, I will be glad to give you the exact sequence if you want, and it can be done in just a couple of hours.
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when the time right. right now It dosent look promising just for the fact that i use the win office 2000 and autocad. and some other programs that are important. but i think one day i'll a seperate computer and use it to protect the business. Right now i'll try ip-masking the w2k with blackice defender. And will do more studying for future improvements
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