Re: Make a DHCP server using Fedora - Help
- From: Tim <ignored_mailbox@xxxxxxxxxxxx>
- Date: Sun, 16 Nov 2008 12:43:18 +1030
Tim:
It seems pointlessly redundant to declare a subnet twice. And stranger
to declare it differently. I see no point for the first one.
Antonio Olivares:
Which one should I keep Tim, the first one or the second one?
I believe my last sentence should have answered that.
The machine that will become the server has gateway 10.154.19.1, is
it okay to make the server 10.154.19.0 ?
Addresses ending with zero or 255 (x.y.z.0 and x.y.z.255) are generally
regarded as special purpose addresses, and machines would normally be
assigned addresses from 1 to 254 as the last quad.
It's not a hard and fast rule, there are exceptions. But some things
make assumptions, and get their knickers in a twist if you try to do
otherwise.
There's two conventions of using the .1 or .254 address for your
router/gateway, but that's just a convention, and about the only thing
that insisted on one of them was the *old* Windows internet connection
sharing, that insisted on using 192.168.0.1 for the gateway PC.
Also the machine's netmask is 255.255.255.0 and the netmask of the
server should it be 255.255.255.0 or 255.255.255.254 or other thing?
If everything is actually on the same subnet (e.g, they're wired
together through a switch or router, and they can all connect to each
other without having to go through a gateway) then they should all have
the same netmask. For the average home network, using 192.168.x.y
addressing, then the 255.255.255.0 netmask suffices.
If there are separate physical networks, or you have some need to carve
up how you're using it, then you can use more restrictive netmasks, and
you may have to, for those networks to work (they need to know the
boundary between the same network and the outside network, so they can
make connections to the outside one through the gateway between them).
I would suggest that whatever PC you're running the DHCP server on
should have a fixed IP address, and for that to be fixed in your network
configuration, not trying to get the DHCP server to set its own IP
address. This, probably, also means ensuring that the NetworkManager
service is turned off, and the older network service is used.
My DHCP server still runs on a Fedora Core 4 box, and I have no
parameters set into it for what interface it listens to, there's only
one network interface on the box.
My working /etc/dhcp.conf file is below, with example.com being used as
an example domain name. It has more options than you'd need, and some
you probably should remove.
authoritative;
include "/etc/rndc.key";
# (This is the same key used by BIND and the rndc tool, it's needed to
# be able to update DNS records.)
# Server configuration:
ddns-domainname "example.com.";
ddns-rev-domainname "in-addr.arpa.";
ddns-update-style interim;
ddns-updates on;
allow client-updates;
default-lease-time 21600; # 6 hours
max-lease-time 43200; # 12 hours
# Client configuration:
option domain-name "example.com.";
option pop-server pop3.example.com;
option smtp-server smtp.example.com;
option wpad-curl code 252 = text;
option wpad-curl "http://proxy.example.com/wpad.dat";;
option www-server www.example.com;
option ntp-servers time.example.com;
#option time-offset 34200; # Australian Central Standard Time
option time-offset 37800; # Central Australia Daylight Time
option ip-forwarding off; # tell clients not to act as gateways (?)
subnet 192.168.0.0 netmask 255.255.255.0 {
range 192.168.0.100 192.168.0.200; # allocate IPs within this range
option routers 192.168.0.1; # default gateway
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.0.255;
option domain-name-servers 192.168.0.1;
option netbios-name-servers 192.168.0.1; # WINS
option netbios-dd-server 192.168.0.1; # SMB
option netbios-node-type 8;
option netbios-scope "";
option finger-server 192.168.0.1;
zone 0.168.192.in-addr.arpa. {
primary 192.168.0.1;
key rndckey;
}
zone example.com. {
primary 192.168.0.1;
key rndckey;
}
}
--
[tim@localhost ~]$ uname -r
2.6.27.5-37.fc9.i686
Don't send private replies to my address, the mailbox is ignored. I
read messages from the public lists.
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- Re: Make a DHCP server using Fedora - Help
- From: Antonio Olivares
- Re: Make a DHCP server using Fedora - Help
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