DHCP clients no internet access

[sanderj]

from the client can you 'ping 192.168.33.1'?

[Leppie]

from the client can you 'ping 192.168.33.1'?

yes, and i can even do a dig <network> axfr or ping other clients on the lan.
this is however very slow, it takes about 24 seconds to send and receive 4 packets...

[sanderj]

Well, run all command I gave, and post the output here, including "ip route show"

[Leppie]

here we go:

ifconfig
eth0      Link encap:Ethernet  HWaddr 00:26:2d:1e:21:dc  
          inet addr:192.168.33.71  Bcast:192.168.33.255  Mask:255.255.255.0
          inet6 addr: fe80::226:2dff:fe1e:21dc/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:88 errors:0 dropped:0 overruns:0 frame:0
          TX packets:117 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:17264 (17.2 KB)  TX bytes:11908 (11.9 KB)
          Interrupt:18 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:197 errors:0 dropped:0 overruns:0 frame:0
          TX packets:197 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:21734 (21.7 KB)  TX bytes:21734 (21.7 KB)

ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:26:2d:1e:21:dc brd ff:ff:ff:ff:ff:ff
    inet 192.168.33.71/24 brd 192.168.33.255 scope global eth0
    inet6 fe80::226:2dff:fe1e:21dc/64 scope link 
       valid_lft forever preferred_lft forever
3: vboxnet0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether 0a:00:27:00:00:00 brd ff:ff:ff:ff:ff:ff

ip route show
192.168.33.0/24 dev eth0  proto kernel  scope link  src 192.168.33.71 
169.254.0.0/16 dev eth0  scope link  metric 1000 
default via 192.168.33.1 dev eth0  metric 100

[sanderj]

indeed, the results are the same as before.
here's my setup:
internet <-> router 192.168.2.1 <-> 192.168.2.254 :server: 192.168.33.1 <-> lan

Is your server doing NAT between the LANs?

If not: does your router know where the network 192.168.33 is? If not, you have a problem ...

[Leppie]

Is your server doing NAT between the LANs?

most howto's state that only ip4 forwarding needs to be enabled in the sysctl.conf.

If not: does your router know where the network 192.168.33 is? If not, you have a problem ...

fraid not...

please some advice?

[sanderj]

most howto's state that only ip4 forwarding needs to be enabled in the sysctl.conf.


fraid not...

please some advice?

Probably easiest to do NAT on your Ubuntu server. See http://ubuntuforums.org/showthread.php?t=713874

FYI: I've never done this myself.

[Leppie]

many thanks, the clients now have internet access
the only thing is that now i can no longer ping between the clients.

[sanderj]

many thanks, the clients now have internet access
the only thing is that now i can no longer ping between the clients.

You now do NAT?

Which clients can't ping eachother? On the same LAN, you should be able to ping. Between the different LANs not, because the .33. LAN is not known on the main LAN *and* because you do NAT. ;-(

If you follow my signature, and do 'sudo apt-get install miredo' on the different machines, I expect you can ping6 between the LANs. Can you do that? I'm curious about the result.

[Leppie]

You now do NAT?

yup, up and running

Which clients can't ping eachother?

the clients on the lan (connected to the .33.0 network)

On the same LAN, you should be able to ping. Between the different LANs not, because the .33. LAN is not known on the main LAN *and* because you do NAT. ;-(

yes, i know. that's what i find so weird...

If you follow my signature, and do 'sudo apt-get install miredo' on the different machines, I expect you can ping6 between the LANs. Can you do that? I'm curious about the result.

since you helped me, i'm going to give it a try and post back