Dear Stan,
You need to use IP chains with kernel 2.2.5. You can either rewrite the scripts
or download them. I cant find the link right now. It was available at
www.suse.de/~bb/.
I will try to put the script on my server at http://cgmd71239.chello.nl/data/
I'm right now quite busy. So it'll be tomorrow.
I hope it's helpful. I use the ipchain scripts and i also use a cable modem. I
have hooked a win98 computer up via the ipchain computer, linux, kernel 2.2.4. I
need the win 98 computer because of school. :-(
I hope it's helpful.
Regards,
Joop.
Stan Koper wrote:
> Hi everyone,
>
> I have an internal network, a cable modem (Mediaone) connection to the
> Internet, and an AMD 5x86 machine as my firewall. I had SuSE 6.0 installed
> with the 2.0.36 kernel, then I tried installing the 2.2.5 kernel, and had
> some difficulty. Although ip forwarding worked for a while, I broke a few
> things.
>
> The upshot was I blew away SuSE 6.0 and reinstalled it. Now I'm back to
> square one with a lot of stuff (boy, what you forget when you don't use it).
> I have the LINUX Complete Reference here, and a bunch of printouts on IP
> forwarding, firewalling, using ipfwadm (as well as ipchains, but I'll deal
> with that later).
>
> Here's my problem. My internal IP address is 192.168.10.x, and the
> external NIC is 24.128.24.x When I read the IP filtering setup if ipfwadm
> (I think this is from the "how-to"), it starts off by Denying all services.
>
> OK, type in: ipfwadm -F -p deny
>
> Then it says "flush all commands", and gives three lines with separate
> commands. OK, I'm fine so, far, except that I wonder if flushing all
> commands doesn't flush the "ipfwadm -F -p deny" command also. But let that
> go.
>
> Here's the real problem.
>
> The HOW to give several lines, which I will render as given:
>
> # Forward email to your server
> ifpwadm -F -a accept -b -P tcp -S 0.0.0.0/0 1024:65535 -D 192.1.2.10 25
>
> # Forward email connections to outside email servers
> ipfwadm -F -a accept -b -P tcp -S 196.1.2.10 25 -D 0.0.0.0/0 1024:65535
>
> # Forward web connections to your Web Server
> ipfwadm -F -a accept -b -P tcp -S 0.0.0.0/0 1024:65535 -D 196.1.2.11 80
>
> # Forward web connections to outside Web Server
> ipfwadm -F -a accept -b -P tcp -S 196.1.2.* 80 -D 0.0.0.0/0 1024:65535
>
> #Forward DNS traffic
> ipfwadm -F -a accept -b -P udp -S 0.0.0.0/0 53 -D 196.1.2.0/24
>
> OK, now as a practical matter, I want to substitute my internal NIC ip for
> one of the above IP's, and my external NIC for another. But I get confused.
> In the examples (and I think the author of the How-To is consistent in this
> througout, except perhaps for typos), the IPs are too close for comfort. Do
> I switch my 192.168.10.1 (the IP for the internal NIC on my router) for the
> 192 address above, and my 24.128.24.x IP (external NIC) for the 196.x.x.x
> addresses?
>
> And what's with 196.1.2.* ? What's that supposed to mean?
>
> Any assistance would be greatly appreciated.
>
> Stan Koper
>
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