View Full Version : [ubuntu] Connection issues with Ubuntu Server 10.10

November 4th, 2010, 04:26 PM
EDIT: The problem has solved itself. Threatening the server with a hammer worked. :P
But seriously, restarting the router yet again, I tried DHCP again and now it worked and connectivity was restored.


I've scoured the forum for a few days now and I can't figure out what I did wrong.

I've set up a new Ubuntu 10.10 server on an Acer Aspire H340 and am having trouble with setting up the network. The machine worked flawlessly with Ubuntu 8.10 Server for more than a year, but I decided that an upgrade was in order.
Foolish me. :(

I have a number of machines connected to a router at None but the new server have problems with connecting via DHCP. The new server did not accept DHCP leases from the router. That problem did not exist with the 8.10 server.
To work around that problem in 10.10, I configured the server with a static IP like this:


auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
gateway my router has a DHCP server, it only assigns IP addresses up to, so the address set is outside of the range controlled by the DHCP server.
Also, the router can "see" the server in that the server appears in the list of attaches machines.

Since the server is headless, I have set up a script to run upon reboot (@reboot cron job) to give me some information on the problem.

ifconfig eth0 shows:

eth0 Link encap:Ethernet HWaddr 00:26:2d:00:ff:19
inet addr: Bcast: Mask:
inet6 addr: fe80::226:2dff:fe00:ff19/64 Scope:Link
RX packets:2 errors:0 dropped:0 overruns:0 frame:0
TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:195 (195.0 B) TX bytes:354 (354.0 B)
The route is set as

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface * U 0 0 0 eth0
default UG 100 0 0 eth0My other machines have similar IP addresses and the same Bcast and Mask and route.

mii-Tool shows:

eth0: negotiated 1000baseT-HD flow-control, link ok/etc/resolv.conf contains

domain fritz.box
search fritz.box
nameserver -C network shows

description: Ethernet interface
product: 88E8071 PCI-E Gigabit Ethernet Controller
vendor: Marvell Technology Group Ltd.
physical id: 0
bus info: pci@0000:09:00.0
logical name: eth0
version: 16
serial: 00:26:2d:00:ff:19
size: 1GB/s
capacity: 1GB/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.25 duplex=full firmware=N/A ip= latency=0 link=yes multicast=yes port=twisted pair speed=1GB/s
resources: irq:31 memory:f0300000-f0303fff ioport:2000(size=256) memory:81000000-8101ffff(prefetchable)The firewall on the server is configured as follows:

Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination From what I understand, all that should be well... but when I try to ping the router from the server, this is the result:

PING ( 56(84) bytes of data.

--- ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 3999msI can ping the router from all other machines.
I also can not ping the server from any other machine.

I'd be grateful for any input on how to resolve this issue. If I can provide more information, just let me know what is needed.
Thank you in advance.