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MikeschTheCat

2006-Feb-13 15:55 UTC

[Xen-users] Network Problem with xen 3.0.1

Hallo @all,

i can ping my domU maschine from dom0, 
but ssh/dns between dom0 and domU dosn''t work :-(

here any tests:

blackhat2       = dom0 (192.168.1.1)
blackhat2web = domU (192.168.1.2)

(ping from dom0 to dom0)
blackhat2:~# ping -c1 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.074 ms

(ping dom0 to domU)
blackhat2:~# ping -c1 192.168.1.2
PING 192.168.1.2 (192.168.1.2) 56(84) bytes of data.
64 bytes from 192.168.1.2: icmp_seq=1 ttl=64 time=0.866 ms

(ssh dom0 to dom0)
blackhat2:~# ssh 192.168.1.1
Password:
Last login: Mon Feb 13 16:28:38 2006 from laptop.intern

(ssh dom0 to domU)
blackhat2:~# ssh 192.168.1.2
maybe 5 minutes later: Connection closed by 192.168.1.2

(ssh domU to domU)
blackhat2web:~# ssh 192.168.1.2
host key verification failed.

(ssh domU to dom0)
blackhat2web:~# ssh 192.168.1.1
---TIMEOUT---

(ifconfig on dom0)
blackhat2:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0E:0C:A1:B0:63
          inet addr:10.20.11.61  Bcast:10.20.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:81501 errors:0 dropped:0 overruns:0 frame:0
          TX packets:960 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:18749851 (17.8 MiB)  TX bytes:78554 (76.7 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:12 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1316 (1.2 KiB)  TX bytes:1316 (1.2 KiB)

peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          UP BROADCAST RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:81703 errors:0 dropped:0 overruns:0 frame:0
          TX packets:965 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:19120933 (18.2 MiB)  TX bytes:83890 (81.9 KiB)
          Base address:0x1880 Memory:40000000-40020000

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:960 errors:0 dropped:0 overruns:0 frame:0
          TX packets:81501 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:78554 (76.7 KiB)  TX bytes:18749851 (17.8 MiB)

vif1.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1058 errors:0 dropped:0 overruns:0 frame:0
          TX packets:78943 errors:0 dropped:2242 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:99198 (96.8 KiB)  TX bytes:17578788 (16.7 MiB)

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet addr:192.168.1.1  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:22322 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1089 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1802742 (1.7 MiB)  TX bytes:116516 (113.7 KiB)

(ifconfig on domU)
blackhat2web:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:16:3E:56:6C:4C
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:471 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:43852 (42.8 KiB)  TX bytes:42 (42.0 b)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

(domU Config file)
blackhat2:~# cat /etc/xen/vm01_web_server.sxp
# standard config

name ="vm01_web_server"
kernel ="/boot/vmlinuz-2.6.12.6-xenU"
root ="/dev/hda1"
memory =128
disk
[''file:/vserver/images/vm01_web_server.img,hda1,w'',''file:/vserver/images/vm01_web_server-swap.img,hda2,w'']

# network

nics=1
vif = [''bridge=xenbr0'']
dhcp ="off"
ip="192.168.1.2"
netmask="255.255.255.0"
gateway="192.168.1.1"
hostname="blackhat2web"

extra="3"

(route on domU)
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0
xenbr0
10.20.0.0       0.0.0.0         255.255.0.0     U     0      0        0 eth0
0.0.0.0         10.20.1.3       0.0.0.0         UG    0      0        0 eth0

If you need anythink more, tell me please.

how can i stop/break programms like ping ssh, or other that i can normaly
break with STRG+C, this Tastekombination don''t work on domU''s
:-(

Best regards
Stefan
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Heiko Wundram

2006-Feb-13 16:13 UTC

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Re: [Xen-users] Network Problem with xen 3.0.1

Am Montag, 13. Februar 2006 16:55 schrieb MikeschTheCat:> (route on domU)
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0
> xenbr0
> 10.20.0.0       0.0.0.0         255.255.0.0     U     0      0        0
> eth0 0.0.0.0         10.20.1.3       0.0.0.0         UG    0      0       
> 0 eth0
This looks fine, but what about the routes on dom0? I guess your problem is 
there.

-- 
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Heiko Wundram

2006-Feb-13 16:14 UTC

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Re: [Xen-users] Network Problem with xen 3.0.1

Am Montag, 13. Februar 2006 17:13 schrieb Heiko Wundram:> This looks fine, but what about the routes on dom0? I guess your problem is
> there.
Forget what I said... The routes you posted don''t seem to be domU
routes, but
dom0 routes, right? Why not post the routes of the VM?

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MikeschTheCat

2006-Feb-13 16:16 UTC

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Re: [Xen-users] Network Problem with xen 3.0.1

Sorry was an mistake form me :-(
here now the right route''s for dom0 & domU

(route on dom0)
 Destination     Gateway         Genmask         Flags Metric Ref    Use  
Iface
 192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0   
xenbr0
 10.20.0.0       0.0.0.0         255.255.0.0     U     0      0        0      
eth0 
0.0.0.0         10.20.1.3       0.0.0.0         UG    0      0        0 eth0

(route on domU)
blackhat2web:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 eth0

regards Stefan
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MikeschTheCat

2006-Feb-13 16:25 UTC

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Re: [Xen-users] Network Problem with xen 3.0.1

There no firewall running at the moment.
This can''t be the problem.

(iptables on dom0)
blackhat2:~# iptables --list
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


(iptables on domU)
blackhat2web:~# iptables --list
FATAL: Module ip_tables not found.
iptables v1.2.11: can''t initialize iptables table `filter'':
iptables who?
(do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.


best regards Stefan
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