Hi everyone,

i am trying to acquire some networking skills.
I posses some basic Linux skills (9 years of user experience should taken care of that, i guess).
But with networking i have some problems. Please give me some tips, please not a solutions, otherwise i just copy paste and learn nothing. More of a advice where to look and for what.
I'm currently busy with following:
I am trying to set up centos machine as DHCP server for my internal (home) network of whole 2 computers :). well this machine will be much more then just dhcp, it's just at this particular moment i'm trying to get that working right.
So, i have a router from my ISP which originally had dhcp, but i switched that off, so i could set it up on centos machine (bbox from now on).
I realize that using bbox as a router would be easier, but i need modem to get adsl signal inside, and i don't have that.
So router will play role of a modem.
With this in mind i equipped bbox with 2 ethernet cards - eth0 and eth1.
eth0 is connected to router and eth1 will be where rest of my network computers will be connect to (strough very simple switch of course)

router has a static ip 10.0.0.1
bbox static 10.0.0.2 (on eth0)

goal for now is to get onto the internet with my desktop (amd64 from now).

following i have configured:

dhcp on bbox


eth0


eth1


resolve.conf (on bbox) contains dns from my ISP.

my amd64 receives ip address from bbox (10.0.0.48), but i cant go onto internet.
where and what i'm doing wrong?

PS rest of my network computers have automatic dhcp settings. so intention is that they aquier there ips and other settings from bbox

please help me out

thnx in advance

ok, i learned that i will have to use NAT to make traffic go from eth1 to eth0 and further.

i will try to look for simple nat how to.

i couldn't figure it out.... i really need your help with this.

Sounds like a pretty vanilla iptables setup would do what you want. Fix your DHCP config on the server so that all the clients point to it's internal interface as their default gateway, then modify the instructions here:

http://www.howtoforge.com/nat_iptables

To fit for your situation. Assuming a correct setup, that will force all traffic from your internal clients to external destinations through your server, merrily NAT'ng the traffic along the way.

--Matt