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I've got some strange effects in my network behavior after updating to 12.04 - before all worked fine:

My network is segmented with my desktops residing in

My DSL-router lives in a segment

My internal router listens to and

My desktop receives its ip address as and its default gateway off course to all via DHCP.

All ip addresses can be accessed within the network, but if I ping only the first icmp packet comes back correctly. All subsequent packages return with Desination Host Unreachable - looks quite weird to me.

The dhcpd.conf entry looks like:

netmask {
option definitions common to all supported networks...
option domain-name "kesenheimer.org";
option domain-name-servers,;
option routers;

host beate {
# Ethernet address of the client machine
hardware ethernet 00:0D:60:70:0D:EF;
# IP address to assign

I've configured the NetworkManager to:



and /etc/network/interfaces to:

auto lo
iface lo inet loopback
auto eth0

When I start the network configuration tool, all information sent by DHCP is displayed correctly.

I'm not sure how to fix this problem.

share|improve this question
Is your router routing correctly between and –  jdthood Mar 20 '13 at 9:57

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