I have a desktop machine running woody, with kernel 2.4.20-ac2. The
desktop is connected to a Netgear switch, which is in turn connected
to a wireless access point. In addition, there are several laptops in
the house which connect to the Netgear switch.
I use a very simple iptables script to turn the desktop into a gateway
for the other machines in the house. One laptop uses a wireless card.
The others, until recently, connected to the Netgear switch directly
and used dhcp to get an IP address (the desktop is set up as a dhcp
server),
Until very recently, my connection to the net was a dialup PPP
connection, and all of the above worked very well.
A short while ago, however, I signed up for DSL (earthlink), bought
and installed a second ethernet card, and set about getting it all
working.
Mostly it works very well. The desktop connects to a DSL `modem'
through the new ethernet card and is assigned an IP address via
DHCP. The connection is as fast as I had hoped it would be. The
wireless connection works very well.
But for some reason, it is now impossible for a laptop connected
through the netgear switch to get a dhcp connection from the
desktop. I use pump on the Debian laptop (the other laptop that used
to connect in this way runs Os X; I don't know what dhcp client comes
with that). Calling /sbin/pump results in a long hang and then
`operation failed'. The logs don't reveal very much (to me
anyway). I'll paste them in below along with the interfaces file and
the dhcpd config file from the desktop machine.
I can assign a static IP address on the private network to the laptop
and connect it to the net in that way (this works just fine), but (i)
I'd like to understand why it seems to be impossible to use dhcp in
this kind of context and (ii) it would be very convenient if visiting
laptops could just plug in to the Netgear switch and connect to the
net using the desktop as a dhcp server.
I'd be very grateful for any insight about why this seems impossible
given the other decisions I've made. Thanks very much in advance,
Jim
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Logs (Pump)
----------------------------------------------------------------------
Jan 20 17:29:39 lapdog kernel: eth0: Setting 100mbps half-duplex based on
auto-negotiated partner ability 40a1.
Jan 20 17:29:39 lapdog pumpd[1839]: PUMP: sending discover
Jan 20 17:29:39 lapdog pumpd[1839]: breq: opcode: 1
Jan 20 17:29:39 lapdog pumpd[1839]: breq: hw: 1
Jan 20 17:29:39 lapdog pumpd[1839]: breq: hwlength: 6
Jan 20 17:29:39 lapdog pumpd[1839]: breq: hopcount: 0
Jan 20 17:29:39 lapdog pumpd[1839]: breq: xid: 0xdad05b36
Jan 20 17:29:39 lapdog pumpd[1839]: breq: secs: 0
Jan 20 17:29:39 lapdog pumpd[1839]: breq: flags: 0x0000
Jan 20 17:29:39 lapdog pumpd[1839]: breq: ciaddr: 0.0.0.0
Jan 20 17:29:39 lapdog pumpd[1839]: breq: yiaddr: 0.0.0.0
Jan 20 17:29:39 lapdog pumpd[1839]: breq: server_ip: 0.0.0.0
Jan 20 17:29:39 lapdog pumpd[1839]: breq: bootp_gw_ip: 0.0.0.0
Jan 20 17:29:39 lapdog pumpd[1839]: breq: hwaddr:
Jan 20 17:29:39 lapdog pumpd[1839]: breq: servername:
Jan 20 17:29:39 lapdog pumpd[1839]: breq: bootfile:
Jan 20 17:29:39 lapdog pumpd[1839]: breq: vendor: 0x63 0x82 0x53 0x63
Jan 20 17:29:39 lapdog pumpd[1839]: breq: vendor: 53 1 0x01
Jan 20 17:29:39 lapdog pumpd[1839]: breq: vendor: 0xff
----------------------------------------------------------------------
----------------------------------------------------------------------
/etc/network/interfaces (desktop):
----------------------------------------------------------------------
# The loopback interface
#
auto lo
iface lo inet loopback
# The first network card (external connection)
#
auto eth0
iface eth0 inet dhcp
# The second network card (internal network)
#
auto eth1
iface eth1 inet static
address 192.168.93.3
network 192.168.93.0
netmask 255.255.255.0
broadcast 192.168.93.255
----------------------------------------------------------------------
----------------------------------------------------------------------
/etc/dhcpd.conf (on the desktop):
----------------------------------------------------------------------
#
# $Id: dhcpd.conf,v 1.4.2.2 2002/07/10 03:50:33 peloy Exp $
#
# option definitions common to all supported networks...
option domain-name "branci40.org";
option domain-name-servers 128.114.129.33, 128.114.142.6;
option subnet-mask 255.255.255.0;
default-lease-time 600;
max-lease-time 7200;
server-name "toraigh";
subnet 192.168.93.0 netmask 255.255.255.224 {
range 192.168.93.20 192.168.93.30;
option broadcast-address 192.168.93.255;
option routers 192.168.93.3;
}
host lapdog {
hardware ethernet 00:40:D0:25:30:45;
fixed-address 192.168.93.2;
}
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