[Users] networking with debian based templates

existx existx at existx.net
Tue Jan 29 19:42:51 EST 2008


Hi,

My Host is CentOS 5.x. I also have 
DEF_OSTEMPLATE="debian-4.0-i386-minimal" defined in /etc/vz/vz.conf

I can ping the Host Node's IP and the Host Node can ping the VM's IP 
(both are public IP addresses) but I can't connect to the outside world. 
There is one gentoo VM and one centos VM running with the same 
configuration, but connecting to the outside world and allowing connections.

[root at elbrus ~]# cat /etc/sysctl.conf
# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and
# sysctl.conf(5) for more details.

# Controls IP packet forwarding
net.ipv4.ip_forward = 1
net.ipv4.conf.default.proxy_arp = 0

# Controls source route verification
net.ipv4.conf.all.rp_filter = 1

# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 1

# Controls whether core dumps will append the PID to the core filename
# Useful for debugging multi-threaded applications
kernel.core_uses_pid = 1

# we do not want all our interfaces to send redirects
net.ipv4.conf.default.send_redirects = 1
net.ipv4.conf.all.send_redirects = 0
[root at elbrus ~]#

Additionally, there's no iptables rules currently.

[root at elbrus ~]# iptables -nL
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
[root at elbrus ~]#

Any ideas?

Thanks in advance!


albinootje wrote:
>  existx at existx.net wrote:
>
>  hi,
>
> > I'm trying to use the following templates:
> >
> > debian-4.0-i386-minimal
>  ---cut for brevity---
> > venet0    Link encap:UNSPEC  HWaddr 
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
> >           inet addr:127.0.0.1  P-t-P:127.0.0.1  Bcast:0.0.0.0  
Mask:255.255.255.255
> >           UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
> >           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
> >           collisions:0 txqueuelen:0
> >           RX bytes:0 (0.0 b)  TX bytes:588 (588.0 b)
> >
> > venet0:0  Link encap:UNSPEC  HWaddr 
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
> >           inet addr:public.ip.add.ress  P-t-P:public.ip.add.ress 
Bcast:0.0.0.0  Mask:255.255.255.255
> >           UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
> >
> > Why does it create two venet0 interfaces with one being loopback and 
one being my public IP address?
> >
> > Of course, there's no network connectivity with this setup.
>
>  i'm using a self-build debian etch template on a debian etch machine,
>  and i see the same thing, but it works without any problems since many 
months
>
>  i have :  DEF_OSTEMPLATE="debian-4.0-i386-minimal"
>  in /etc/vz/vz.conf
>
>  i've edited /etc/sysctl.conf according to the OpenVZ-wiki
>
>  and that's about it, works like a charm!
>
>  _______________________________________________
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>  https://openvz.org/mailman/listinfo/users
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