Hi all,

Newbie to Linux, I have (had) a working Debian Ntop setup and want to add another Nic to monitor a DMZ segment. I only want to put the DMZ Nic into promiscuous mode without an ip address (to make it more "hopefully" secure).

I installed two identical nics (3Com 905x). I entered: auto eth1 into the interfaces file with no other info (ip address, network address or gateway). I added the eth1 to the ntop -i config file and restarted the server (I know I probably didn't have to but I couldn't get the restart command to work :-) ).

I no longer get a webpage with this setup. Do I have to re-compile the Kernel for these nic's you think? I can get out on eth0 but now I'm getting a dns error on my ntop page (port 3000). The name of the machine resolves. Its probably something very simple but to a new linux user like me everything is a bit of a mountain to climb at the moment :-)
Oh, I tried using make-kpkg kernel_image but its complaining that I'm not in the top level source directory. Which directory would I need to be in for an alpha version.

Can someone point be in the right direction with my errorous ways?

Hi,



if you put an "auto" for your nic in /etc/network/devices it can happen that an installed dhcp-client is getting an ip-address/subnet from your dhcp server. If this happens it is possible that you have two nics on the same subnet which isn't really nice ...

So set another ip and another subnet for this device (f.e. 10.1.1.1./24). I hope this works. The descirption of your problem isn't that "big" so that i can't figure out exactly what's going on Also check your routing settings...

Quote:

I no longer get a webpage with this setup. Do I have to re-compile the Kernel for these nic's you think? I can get out on eth0 but now I'm getting a dns error on my ntop page (port 3000). The name of the machine resolves. Its probably something very simple but to a new linux user like me everything is a bit of a mountain to climb at the moment :-) Oh, I tried using make-kpkg kernel_image but its complaining that I'm not in the top level source directory. Which directory would I need to be in for an alpha version. Can someone point be in the right direction with my errorous ways?

The "normal" TLDirectory of a Linux tree should be /usr/src/linux if you're in it do a make-kpkg kernel_image and everything should work fine

cu

Thanks Stony for the reply. After a little guidence and a couple of hours tinkering I found out that the problem was one of the NIC's. It just wouldn't come up. I swapped it out for another 3Com and away we went.

As it turns out you can just have > auto eth1 with no IP address and Ntop picks it up without any fuss. Seems the dns error I was getting from my web page we a missing dependency for Ntop. So a quick re-install got me back on track.

Now it off to do battle with and other Debian box and RRD Tool and Cacti. Yee Haw!

Thanks again for the post.
Cheers