Re: [uml-user] Network Difficulties II

Brendan McNally Thu, 17 Apr 2008 09:59:20 -0700

Hi

Really hope you can help me out with this, networking has been a real problem for me with UML. Can't get SSH or ping to connect from either side.

Brendan

Guest;
[EMAIL PROTECTED] ~]# ifconfig eth0 192.168.0.253 up
[EMAIL PROTECTED] ~]# route add default gw 192.168.0.254
[EMAIL PROTECTED] ~]# ssh [EMAIL PROTECTED]
ssh: connect to host 192.168.50.101 port 22: No route to host
[EMAIL PROTECTED] ~]# ping 192.168.50.101
PING 192.168.50.101 (192.168.50.101) 56(84) bytes of data.
>From 192.168.0.253 icmp_seq=1 Destination Host Unreachable
>From 192.168.0.253 icmp_seq=2 Destination Host Unreachable
>From 192.168.0.253 icmp_seq=3 Destination Host Unreachable

--- 192.168.50.101 ping statistics ---
4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 3023ms
, pipe 3
[EMAIL PROTECTED] ~]#

Host;
[EMAIL PROTECTED]:/home/brendan# ssh [EMAIL PROTECTED]
ssh: connect to host 192.168.0.253 port 22: No route to host
[EMAIL PROTECTED]:/home/brendan# ping 192.168.0.253
PING 192.168.0.253 (192.168.0.253) 56(84) bytes of data.
>From 192.168.0.254 icmp_seq=1 Destination Host Unreachable
>From 192.168.0.254 icmp_seq=2 Destination Host Unreachable
>From 192.168.0.254 icmp_seq=3 Destination Host Unreachable

--- 192.168.0.253 ping statistics ---
4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 3007ms
, pipe 3
[EMAIL PROTECTED]:/home/brendan#

Jay Shah wrote:

Did you check if you could ping the host machine. If you can, but
can't ping the world, check if your IP Masquerading is on. E.g.


iptables -t nat -I POSTROUTING -o eth0 -j MASQUERADE

Jay

On Thu, Apr 17, 2008 at 4:53 PM, Antoine Martin <[EMAIL PROTECTED]> wrote:

Brendan,

You're not explaining what doesn't work....
Have you tried pinging, traceroute, tcpdump, etc..

Cheers
Antoine






Brendan McNally wrote:

Hi All

I am having major problems getting my UML sessions networked
correctly.  Can someone please review my configuration or suggest a
solution?  It's really getting to me!

Thanks
Brendan

Host: 192.168.50.101 <http://192.168.50.101>
GW: 192.168.50.1 <http://192.168.50.1>

Network Setup on hosts;
tunctl
tunctl -b
tunctl -u root -t umlserver
tunctl -d tap0
ifconfig umlserver 192.168.0.254 <http://192.168.0.254> up
route add -host 192.168.0.253 <http://192.168.0.253> dev umlserver

echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/conf/umlserver/proxy_arp
arp -Ds 192.168.0.253 <http://192.168.0.253> eth0 pub

[EMAIL PROTECTED]:/home/brendan/test# ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:0A:E4:AC:19:57
          inet addr:192.168.50.101 <http://192.168.50.101>
Bcast:192.168.50.255 <http://192.168.50.255>  Mask:255.255.255.0
<http://255.255.255.0>

          inet6 addr: fe80::20a:e4ff:feac:1957/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3914 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4213 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:320456 (312.9 KB)  TX bytes:631413 (616.6 KB)
          Interrupt:20 Base address:0x6000

eth1      Link encap:Ethernet  HWaddr 00:14:A5:34:14:26
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:702 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:29484 (28.7 KB)
          Interrupt:11

lo        Link encap:Local Loopback
          inet addr:127.0.0.1 <http://127.0.0.1>  Mask:255.0.0.0
<http://255.0.0.0>

          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:328 errors:0 dropped:0 overruns:0 frame:0
          TX packets:328 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:40509 (39.5 KB)  TX bytes:40509 (39.5 KB)

tap0      Link encap:Ethernet  HWaddr 00:FF:2E:A0:F3:47
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:9 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:594 (594.0 b)  TX bytes:0 (0.0 b)

tap1      Link encap:Ethernet  HWaddr 00:FF:F4:AA:CA:DE
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:9 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:594 (594.0 b)  TX bytes:0 (0.0 b)

umlserver Link encap:Ethernet  HWaddr 00:FF:7C:1D:9C:82
          inet addr:192.168.0.254 <http://192.168.0.254>
Bcast:192.168.0.255 <http://192.168.0.255>  Mask:255.255.255.0
<http://255.255.255.0>

          inet6 addr: fe80::2ff:7cff:fe1d:9c82/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:35 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)




Start command;
./vmlinux-server ubda=Fedora7-server_fs mem=128M umid=umlserver
eth0=tuntap,tap0


Guest Setup;
ifconfig eth0 192.168.0.253 <http://192.168.0.253> up
route add default gw 192.168.0.254 <http://192.168.0.254>



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Re: [uml-user] Network Difficulties II

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