various networking questions

[centurian_trev]

hello, all. nice forum you have going, here!

i want to make a router/firewall like everyone else in the world does. i'm running redhat9 right now.
to save system resources, i did not install x or any window managers or anything like that. it's all CLI.

i'm having some problems with my dhcp server, and google isn't helping. what would cause a client to ignore a DHCP offer?

1)client requests
2)server sees request
3)server offers address
4)server offers address
5)server offers address
6)etc.

also, my church is considering purchasing some wireless cards for their laptops. they are concerned about security. they are concerned a little bit about the signals going across the RF waves, but more concerned about the sensitive matuerial and also network resources and printers and such.

is there a way we can use linux to authenticate windows (and linux!) users so that they must be permitted onto the network? if they are not permitted, we do not want them to have use of the internet connection or printers or fileservers, etc.

thanks.

[korggis]

Be sure to check out this link: http://www.linux-mag.com/2000-04/networknirvana_01.html
and this one: http://ldp.linux.no/HOWTO/DHCP/

Good luck!

[centurian_trev]

okay, well.... i tried that howto before.

i'll post a few things:

my routing table:

[root@Labyrinth root]# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
255.255.255.255 * 255.255.255.255 UH 0 0 0 eth1
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
169.254.0.0 * 255.255.0.0 U 0 0 0 eth1
10.0.0.0 * 255.0.0.0 U 0 0 0 eth1
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default 192.168.0.1 0.0.0.0 UG 0 0 0 eth0


my dhcpd.conf file



# Sample /etc/dhcpd.conf
# (add your comments here)
default-lease-time 3600;
max-lease-time 36000;
option subnet-mask 255.0.0.0;
option broadcast-address 10.0.0.255;
option routers 10.0.0.2;
#option domain-name-servers 10.0.0.1;
ddns-update-style ad-hoc;
#option domain-name "mydomain.org";

subnet 10.0.0.0 netmask 255.0.0.0 {
range 10.0.0.10 10.0.0.20;
}
~




i know that these addresses are non-routable. i have reasons ;)

...but seriously... what is going on here that the client keeps ignoring the DHCPOFFER ?

thanks for your patience and your help!


edit: i added "AUTHORATIVE;" to the top of the dhcpd.conf file..... no luck!

[centurian_trev]

thank you for your help and your interest even if you couldn't help.

the problems was caused by a faulty NIC that could receive but not transmit (first one i've encountered in 5 years!)

thanks again.

[Clyde]

I believe you can use Samba for user authentication for win clients. Plus you can use it for resource sharing including printers installed on BOTH win and linux boxes. Correct me if I'm wrong guys.