Czesc
W setupie wybierasz punkt 42 DHCP server i tak to leci:
Advanced settings (x - back to main menu) []? 42
Enable DHCP if you want automatic configuration of client
IP address, subnet mask, domain, and dns server. You must
choose an IP address range in network setup for each
network you require DHCP to work on.
NOTE: You should not enable the DHCP server if your
network already has one.
WARNING: y - enable service worldwide, insecure!
s - enable service locally, secure (recommended)
n - disable service
421 Enable DHCP server y/s/n [y]? y
422 WINS address (if you have one, otherwise - '-') []?
423 Default-lease-time,max-lease-time (sec) [604800,604800]?
424 Do you want to create/edit static dhcp leases y/n []? y
Now edit the leases, then save them and exit by pressing:
<ALT>+<X> or <ESC> then <X>
Press ENTER to continue
Po wcisnieciu ENTER pojawi ci sie ekranik

gdzie przypisujesz adresom MAC kart sieciowych adresy IP :
# Static DHCP leases
#
#This file lists optional static dhcp leases. You must edit the version
#of this file in /mnt/router/etc not /etc. All lines beginning with #
#are comments and are ignored.
#
#sample:
#
#host win98 {
#fixed-address 192.168.0.10;
#hardware ethernet 00:80:af:82:8a:7c;
#}
Aha i jeszcze jedno - w ustawieniach sieci eth1 (LAN) zakres IP range pozostaw pusty. Wowczas internet beda mieli tylko Ci ktorych adresy MAC zostaly uwzglednione w pkt42.