Hello everybody,
I’m new to Xen so forgive me if this is already well
known issue.
I’m using Ubuntu server 7.04 (feisty) with Xen 3.0.3
Everything works perfectly, apart from networking in NAT
mode.
With bridging it works, with NAT it works, well, quite strange.
Namely, pings go through and name resolution works.
But when I try to use anything substantial, then the
following happens: TCP connection opens but no further traffic goes through,
then the connection just hangs.
It looks like this e.g. by wget:
root@ishtar01-vm01:~# wget http://www.theserverside.com
--12:11:51-- http://www.theserverside.com/
=> `index.html'
Resolving www.theserverside.com... 65.214.43.44
Connecting to www.theserverside.com|65.214.43.44|:80...
connected.
HTTP request sent, awaiting response...
Netstat shows one connection in stat FIN_WAIT1
tcp
0 110
10.0.0.51:57142
65.214.43.44:80 FIN_WAIT1
Kernel version:
2.6.19-4-generic #2 SMP Thu Apr 5 06:06:18 UTC 2007 i686 GNU/Linux
Iptables output on Dom0:
root@ishtar01:~# iptables -L -n
Chain INPUT (policy ACCEPT)
target prot opt
source
destination
Chain FORWARD (policy ACCEPT)
target prot opt
source
destination
ACCEPT 0 --
10.0.0.51
0.0.0.0/0 PHYSDEV
match --physdev-in vif8.0
ACCEPT udp --
0.0.0.0/0
0.0.0.0/0 PHYSDEV
match --physdev-in vif8.0 udp spt:68 dpt:67
Chain OUTPUT (policy ACCEPT)
target prot opt
source
destination
Ifconfig Dom0:
root@ishtar01:~# ifconfig
eth0 Link encap:Ethernet
HWaddr 00:15:17:21:79:62
inet
addr:xx.xx.82.231 Bcast:xx.xx.82.255 Mask:255.255.255.0
UP
BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX
packets:1490930 errors:0 dropped:0 overruns:0 frame:0
TX
packets:10157 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
txqueuelen:100
RX
bytes:98378868 (93.8 MiB) TX bytes:1292258 (1.2 MiB)
Base
address:0x2000 Memory:e8180000-e81a0000
eth0:1 Link encap:Ethernet HWaddr
00:15:17:21:79:62
inet
addr:10.0.0.1 Bcast:10.0.0.255 Mask:255.255.255.0
UP
BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Base
address:0x2000 Memory:e8180000-e81a0000
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:52 errors:0 dropped:0 overruns:0 frame:0
TX
packets:52 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX
bytes:6174 (6.0 KiB) TX bytes:6174 (6.0 KiB)
vif8.0 Link encap:Ethernet HWaddr
FE:FF:FF:FF:FF:FF
inet
addr:10.0.0.178 Bcast:0.0.0.0 Mask:255.255.255.255
UP
BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX
packets:103 errors:0 dropped:0 overruns:0 frame:0
TX
packets:45 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX
bytes:10547 (10.2 KiB) TX bytes:5403 (5.2 KiB)
DomU config:
root@ishtar01:~# cat /etc/xen/vm01.cfg
kernel = "/boot/vmlinuz-2.6.19-4-generic"
ramdisk = "/boot/initrd.img-2.6.19-4-generic"
builder='linux'
memory = 256
name = "vm01"
vcpus = 1
vif = [ 'ip=10.0.0.51' ]
disk = ['phy:vg01/vm01,sda1,w','phy:vg01/vm01-swap,sda2,w']
root = "/dev/sda1 ro"
in /etc/xen/xend-config.sxp, the following is enabled:
(network-script network-nat)
(vif-script vif-nat)
Any ideas where to look further?
Kind regards,
Timur
