* [Qemu-devel] usermode-networking problem
@ 2004-05-23 18:58 Adrian Smarzewski
2004-05-23 20:28 ` Carlos Valiente
` (2 more replies)
0 siblings, 3 replies; 8+ messages in thread
From: Adrian Smarzewski @ 2004-05-23 18:58 UTC (permalink / raw)
To: qemu-devel
Hi,
QEmu 2.5.5 with usermode-networking compiled and turned on.
Internet connection on host system (linux 2.6) works.
on guest system (linux-test):
sh-2.05b# ping -c 3 10.0.2.2
PING 10.0.2.2 (10.0.2.2) 56(84) bytes of data.
64 bytes from 10.0.2.2: icmp_seq=1 ttl=255 time=3.16 ms
64 bytes from 10.0.2.2: icmp_seq=2 ttl=255 time=0.390 ms
64 bytes from 10.0.2.2: icmp_seq=3 ttl=255 time=0.333 ms
sh-2.05b# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
10.0.0.0 * 255.0.0.0 U 0 0 0 eth0
default 10.0.2.2 0.0.0.0 UG 0 0 0 eth0
sh-2.05b# ping -c 3 212.77.100.101
PING 212.77.100.101 (212.77.100.101) 56(84) bytes of data.
--- 212.77.100.101 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2018ms
I don't know why. Should I configure something on host os?
--
Pozdrowienia
Adrian Smarzewski
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [Qemu-devel] usermode-networking problem
2004-05-23 18:58 [Qemu-devel] usermode-networking problem Adrian Smarzewski
@ 2004-05-23 20:28 ` Carlos Valiente
2004-05-24 20:10 ` Adrian Smarzewski
2004-05-25 1:55 ` James Ascroft-Leigh
2004-05-23 20:56 ` vaise
2004-05-23 21:05 ` Fabrice Bellard
2 siblings, 2 replies; 8+ messages in thread
From: Carlos Valiente @ 2004-05-23 20:28 UTC (permalink / raw)
To: qemu-devel
On Sun, 2004-05-23 at 19:58, Adrian Smarzewski wrote:
> sh-2.05b# ping -c 3 212.77.100.101
> PING 212.77.100.101 (212.77.100.101) 56(84) bytes of data.
>
> --- 212.77.100.101 ping statistics ---
> 3 packets transmitted, 0 received, 100% packet loss, time 2018ms
>
>
> I don't know why. Should I configure something on host os?
Yes: On your host you have to:
1. Enable IP forwarding:
# echo 1 > /proc/sys/net/ipv4/ip_forward
2. Enable masquerading
# iptables -t nat -A POSTROUTING \
-s 10.0.0.0/8 \
-d ! 10.0.0.0/8 -j MASQUERADE
C
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] usermode-networking problem
2004-05-23 20:28 ` Carlos Valiente
@ 2004-05-24 20:10 ` Adrian Smarzewski
2004-06-03 10:24 ` Adrian Smarzewski
2004-05-25 1:55 ` James Ascroft-Leigh
1 sibling, 1 reply; 8+ messages in thread
From: Adrian Smarzewski @ 2004-05-24 20:10 UTC (permalink / raw)
To: qemu-devel
Carlos Valiente wrote:
> Yes: On your host you have to:
>
> 1. Enable IP forwarding:
>
> # echo 1 > /proc/sys/net/ipv4/ip_forward
>
> 2. Enable masquerading
>
> # iptables -t nat -A POSTROUTING \
> -s 10.0.0.0/8 \
> -d ! 10.0.0.0/8 -j MASQUERADE
doesn't work for me :(
root@thunder root # cat /proc/sys/net/ipv4/ip_forward
1
root@thunder root # ifconfig
<...>
eth1 Link encap:Ethernet HWaddr 00:02:44:3C:06:53
inet addr:112.2.2.17 Bcast:112.2.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:18610 errors:0 dropped:0 overruns:0 frame:0
TX packets:13040 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:10535515 (10.0 Mb) TX bytes:1478199 (1.4 Mb)
Interrupt:11 Base address:0xee00
<...>
root@thunder root # route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
112.2.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
<...>
0.0.0.0 112.2.2.11 0.0.0.0 UG 0 0 0 eth1
dhcp on 10.0.2.2 and dns on 10.0.2.3 are working.
--
Pozdrowienia
Adrian Smarzewski
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [Qemu-devel] usermode-networking problem
2004-05-23 20:28 ` Carlos Valiente
2004-05-24 20:10 ` Adrian Smarzewski
@ 2004-05-25 1:55 ` James Ascroft-Leigh
1 sibling, 0 replies; 8+ messages in thread
From: James Ascroft-Leigh @ 2004-05-25 1:55 UTC (permalink / raw)
To: qemu-devel
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On Sun, 2004-05-23 at 21:28 +0100, Carlos Valiente wrote:
> On Sun, 2004-05-23 at 19:58, Adrian Smarzewski wrote:
> > sh-2.05b# ping -c 3 212.77.100.101
> > PING 212.77.100.101 (212.77.100.101) 56(84) bytes of data.
> >
> > --- 212.77.100.101 ping statistics ---
> > 3 packets transmitted, 0 received, 100% packet loss, time 2018ms
> >
> >
> > I don't know why. Should I configure something on host os?
>
> Yes: On your host you have to:
>
> 1. Enable IP forwarding:
[...]
> 2. Enable masquerading
[...]
Not sure but I thought that the purpose of the the -user-net feature was
to remove the need for any superuser privileges or special host
configuration.
From what I understand user-mode networking is quite a feat to pull off,
with ICMP (e.g. ping(8)) being probably harder than TCP or UDP due to
the interfaces made available by the system to non-superusers. I have
not looked at the code but the suggestion has been made that it may even
be necessary to fork and exec the (setuid) /usr/ping executable.
I would suspect that, as previously mentioned, UDP is working but the
connection tracking of the TCP implementation is broken/incomplete in
some way.
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] usermode-networking problem
2004-05-23 18:58 [Qemu-devel] usermode-networking problem Adrian Smarzewski
2004-05-23 20:28 ` Carlos Valiente
@ 2004-05-23 20:56 ` vaise
2004-05-23 21:05 ` Fabrice Bellard
2 siblings, 0 replies; 8+ messages in thread
From: vaise @ 2004-05-23 20:56 UTC (permalink / raw)
To: qemu-devel
On Sunday 23 May 2004 19:58, Adrian Smarzewski wrote:
> QEmu 2.5.5 with usermode-networking compiled and turned on.
> Internet connection on host system (linux 2.6) works.
> on guest system (linux-test):
>
> I don't know why. Should I configure something on host os?
Have you tried with your firewall totally opened ? (iptables -P INPUT/OUPUT
ACCEPT and ADSL unplugged of course)
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] usermode-networking problem
2004-05-23 18:58 [Qemu-devel] usermode-networking problem Adrian Smarzewski
2004-05-23 20:28 ` Carlos Valiente
2004-05-23 20:56 ` vaise
@ 2004-05-23 21:05 ` Fabrice Bellard
2 siblings, 0 replies; 8+ messages in thread
From: Fabrice Bellard @ 2004-05-23 21:05 UTC (permalink / raw)
To: qemu-devel
Hi,
ping is _not_ supported reliably in user mode network except to ping the
local router.
Fabrice.
Adrian Smarzewski wrote:
> Hi,
>
> QEmu 2.5.5 with usermode-networking compiled and turned on.
> Internet connection on host system (linux 2.6) works.
> on guest system (linux-test):
>
>
> sh-2.05b# ping -c 3 10.0.2.2
> PING 10.0.2.2 (10.0.2.2) 56(84) bytes of data.
> 64 bytes from 10.0.2.2: icmp_seq=1 ttl=255 time=3.16 ms
> 64 bytes from 10.0.2.2: icmp_seq=2 ttl=255 time=0.390 ms
> 64 bytes from 10.0.2.2: icmp_seq=3 ttl=255 time=0.333 ms
>
> sh-2.05b# route
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use
> Iface
> 10.0.0.0 * 255.0.0.0 U 0 0 0
> eth0
> default 10.0.2.2 0.0.0.0 UG 0 0 0
> eth0
>
> sh-2.05b# ping -c 3 212.77.100.101
> PING 212.77.100.101 (212.77.100.101) 56(84) bytes of data.
>
> --- 212.77.100.101 ping statistics ---
> 3 packets transmitted, 0 received, 100% packet loss, time 2018ms
>
>
> I don't know why. Should I configure something on host os?
>
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Qemu-devel] usermode-networking problem
@ 2004-05-23 18:58 Adrian Smarzewski
0 siblings, 0 replies; 8+ messages in thread
From: Adrian Smarzewski @ 2004-05-23 18:58 UTC (permalink / raw)
To: qemu-devel
Hi,
QEmu 2.5.5 with usermode-networking compiled and turned on.
Internet connection on host system (linux 2.6) works.
on guest system (linux-test):
sh-2.05b# ping -c 3 10.0.2.2
PING 10.0.2.2 (10.0.2.2) 56(84) bytes of data.
64 bytes from 10.0.2.2: icmp_seq=1 ttl=255 time=3.16 ms
64 bytes from 10.0.2.2: icmp_seq=2 ttl=255 time=0.390 ms
64 bytes from 10.0.2.2: icmp_seq=3 ttl=255 time=0.333 ms
sh-2.05b# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
10.0.0.0 * 255.0.0.0 U 0 0 0 eth0
default 10.0.2.2 0.0.0.0 UG 0 0 0 eth0
sh-2.05b# ping -c 3 212.77.100.101
PING 212.77.100.101 (212.77.100.101) 56(84) bytes of data.
--- 212.77.100.101 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2018ms
I don't know why. Should I configure something on host os?
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2004-06-03 10:22 UTC | newest]
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2004-05-23 18:58 [Qemu-devel] usermode-networking problem Adrian Smarzewski
2004-05-23 20:28 ` Carlos Valiente
2004-05-24 20:10 ` Adrian Smarzewski
2004-06-03 10:24 ` Adrian Smarzewski
2004-05-25 1:55 ` James Ascroft-Leigh
2004-05-23 20:56 ` vaise
2004-05-23 21:05 ` Fabrice Bellard
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2004-05-23 18:58 Adrian Smarzewski
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