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Using Linux behind W2k NAT?

DJFinch

n00b
Joined
Feb 4, 2004
Messages
23
Hi, I'm curious if you can use linux behind NAT run by win2k? I was using Fedora Core (not the first time I put linux on a system) but no matter what I tried the system just said there was no signal and the cable was unplugged. The network monitor even showed it was reciving packets from the windows machine. I tried three network cards, and shut down NAT on the windows machine and set it back up... what gives?

BTW windows works fine behind the NAT.
 
you need to set up the linux machine to be a dhcp client, or use static addressing
look into configuring dhcpcd
 
I was using DHCP. And tried static addressing. Still it said I had no connection. Greatly considering using the Linux machine for NAT and making the other comps go through it...
 
you are going to have to give more info
what does ifconfig display?
how is the windoze server set up? dhcp server?
 
Ok, I've installed Linux before, but I'm not good with it, so I have to ask the extreme newbie question...what is ifconfig? Just so everyone can get a good laugh I'm doing all my configuration through Gnome...not the command line.

the Win server has a cable connection that gets its information via DHCP from the ISP. I then share that connection to a 100mb switch using the "internet connection sharing" under windows, which basically just starts a dhcp server.

Under winbloz all I have to do it tell it to use DHCP and it works. Do that with linux and I get nothing.

I did get a minor break through, I went back and reconfigured manually again, and configured the network proxy to go to the shared NIC's IP (the server's IP) to get the proxy information. Using that I could get the connection to finally say it was active. Unfortunatly I couldnt get out to the internet with it.

I'm still working. I'm so sick of Windows that I'm gonna fight with linux until either it kills me or I toss the machine out the damn window.

Any help would be greatly welcomed!
 
BOOM!

Ok I win the dumbass award. I configured the connection manually, configured the Subnet mask, gateway, picked an ip for my system and then, didn't tell it the server's IP for DNS information! Gee...think that might keep a machine from resolving URLS???

I'm going to bed...before I forget to lift the lid on the toilet or walk into a door...

Thanks for the help.
 
ifconfig is the equvelent of windows ipconfig. (interface configuration)
make sure windows is not using some strange propritary smb dhcp or something, (doubtful, but sounds like something it might do). after you think you have dhcp set up fine on both sides, do a
man dhcpcd
on the linux machine and see how to release and renew its dhcp lease.
 
thanks for clearing up the use of ifconfig, how do i use it? If I use a terminal and type it in it says its not a valid filename. Tried it as root, tried it as my user account, dropped out of X and went all over the file system and tried help and man and couldnt get a thing. Do I need to download it, or is it in a directory that isnt normally in the path (or the linux equivilent of the path...I know DOS terms to describe linux issues is newbish...but well I'm a newb so who cares?)

Windows ICS is a simple DHCP service. IIRC windows2k drops and resets the dhcp leases (hence the reason it's only used for small home networks.) upon server reboot. What I am willing to bet is that windows plugs something into the options slot of the DHCP packet to identify itself as windows or something like that that linux dosent do.
 
Originally posted by DJFinch
I was using DHCP. And tried static addressing. Still it said I had no connection. Greatly considering using the Linux machine for NAT and making the other comps go through it...

Look into doing this. Using Linux/UN*X as a router/firewall is much more configurable and reliable than the ICS in Windows. Not to mention much safer to leave a Linux box exposed to the 'net than Windows ;)
 
Originally posted by tdg
Look into doing this. Using Linux/UN*X as a router/firewall is much more configurable and reliable than the ICS in Windows. Not to mention much safer to leave a Linux box exposed to the 'net than Windows ;)
Marginally.

While they don't make much noise, there are automated kits out there that install root-kits on vulnerable systems.

Of course, I took your "exposed" to mean a linux box without a firewall up. With a properly defined firewall set, only someone with a serious interest in what you are doing will take the time and effort to get in.
 
very true. I will look into that once I have a bit more experience running and maintaining Linux. Right now I'm just getting to the point where It's a useable desktop machine. Before I get into the server settings, I want to get better with that.

Which would be better, I have an old router laying around, I quit using it because no matter what when I told it to allow the port counter strike ran on through, it wouldnt. No matter what. I went through with the vendor about it, and they said "oh yeah thats a bug...it dosent save any extra settings...um we were gonna fix that...but um....we just quit supporting that perticular router" or just use the linux box to handle it?

edit: Havent played an online game in about a year...no time.
 
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