[fedora-virt] Routing only works in one direction

[Philip Rhoades]

Rich,


On 2011-09-24 00:13, Richard W.M. Jones wrote:
> On Fri, Sep 23, 2011 at 12:43:12AM +1000, Philip Rhoades wrote:
>> People,
>>
>> I have been installing virtual machines for a while on a Fedora 14
>> x86_64 system (the most recent one was F16 Alpha i686) and I have 
>> always
>> managed to be able to test what I wanted to but ssh-ing from the 
>> host to
>> the virtual machines has never worked (it always works the other way
>> around).  I get:
>>
>>    ssh: connect to host 192.168.122.139 port 22: No route to host
>>
>> ifconfig shows:
>>
>>    virbr0    Link encap:Ethernet  HWaddr FE:54:00:9F:96:2F
>>              inet addr:192.168.122.1  Bcast:192.168.122.255
>> Mask:255.255.255.0
>>
>> route shows:
>>
>>    192.168.122.0   *               255.255.255.0   U     0      0
>> 0 virbr0
>>
>> so why the error message?
>
> There's not enough information here to answer the question,


What other info is needed?


> but I
> would hazard a guess that the problem is because you've overwritten
> libvirtd's own firewall rules.  A well-known way of overwriting them
> is to restart the firewall after libvirtd has started.


I do occasionally manually restart iptables - so I rebooted just in 
case - I see processes:

  1656 ?        Sl     0:04 libvirtd --daemon
  1725 ?        S      0:00 /usr/sbin/dnsmasq --strict-order 
--bind-interfaces --pid-file=/var/run/libvirt/network/default.pid 
--conf-file=  --listen-address 192.168.122.1 --except-interface lo 
--dhcp-range 192.168.122.2,192.168.122.254 --dhcp-lease-max=253
  3311 ?        Sl     0:38 /usr/bin/qemu-kvm -S -M pc-0.13 -enable-kvm 
-m 768 -smp 1,sockets=1,cores=1,threads=1 -name vf16_fresh -uuid 
a7a33c9f-19c2-10e2-b656-2a0121cbfd22 -nodefconfig -nodefaults -chardev 
socket,id=monitor,path=/var/lib/libvirt/qemu/vf16_fresh.monitor,server,nowait 
-mon chardev=monitor,mode=readline -rtc base=utc -boot c -drive 
file=/home/vf16_fresh.img,if=none,id=drive-ide0-0-0,boot=on,format=raw 
-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 
-drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw 
-device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 
-device rtl8139,vlan=0,id=net0,mac=52:54:00:83:c5:2a,bus=pci.0,addr=0x3 
-net tap,fd=39,vlan=0,name=hostnet0 -chardev pty,id=serial0 -device 
isa-serial,chardev=serial0 -usb -vnc 127.0.0.1:0 -vga cirrus -device 
AC97,id=sound0,bus=pci.0,addr=0x4 -device 
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
  6932 pts/23   S+     0:00 grep --color=auto libvirt

- but I still get the same error message ("No route to host") when 
trying to ssh TO the virtual machine . .

Thanks,

Phil.
-- 
Philip Rhoades

GPO Box 3411
Sydney NSW	2001
Australia
E-mail:  phil at pricom.com.au