Re: Problems with nmap with openvz or bridge interfaces

[Daniel Miller <bonsaiviking () gmail com>]

On 04/21/2012 04:36 AM, Pablo Catalina wrote:
> Since nmap 5.51 I have problems launching nmap from a OpeVZ hardware
> machine, it doesn't find the network interfaces.
>
> Can I help with the debuging proccess? I don't know about the nmap code,
> but I can run gdb, strace, ltrace, ... or something else to help with these
> bug.
>
> PS: Now I use proxmox, but I test it using a custom openvz kernel and
> appears the same problem.
>
> fastfoot:~# nmap -p - -A -T5 -v locolandia.net
>
> Starting Nmap 5.61TEST5 ( http://nmap.org ) at 2012-04-16 21:54 CEST
> NSE: Loaded 92 scripts for scanning.
> NSE: Script Pre-scanning.
> route_dst_netlink: can't find interface "vmbr0"
>
> fastfoot:~# ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:10:18:27:f0:80
>           inet6 addr: fe80::210:18ff:fe27:f080/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:9116196 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:5916144 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:4874292232 (4.5 GiB)  TX bytes:4899394695 (4.5 GiB)
>           Interrupt:16
>
> lo        Link encap:Local Loopback
>           inet addr:127.0.0.1  Mask:255.0.0.0
>           inet6 addr: ::1/128 Scope:Host
>           UP LOOPBACK RUNNING  MTU:16436  Metric:1
>           RX packets:7980 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:7980 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:2229736 (2.1 MiB)  TX bytes:2229736 (2.1 MiB)
>
> venet0    Link encap:UNSPEC  HWaddr
> 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
>           inet6 addr: fe80::1/128 Scope:Link
>           UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
>           RX packets:13801544 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:12076253 errors:0 dropped:5 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:9210442987 (8.5 GiB)  TX bytes:6180207546 (5.7 GiB)
>
> vmbr0     Link encap:Ethernet  HWaddr 00:10:18:27:f0:80
>           inet addr:193.146.XXX.119  Bcast:193.146.153.127
> Mask:255.255.255.224
>           inet6 addr: fe80::210:18ff:fe27:f080/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:4765681 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:5904761 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1972925630 (1.8 GiB)  TX bytes:4866619662 (4.5 GiB)
>
> vmbr0:0   Link encap:Ethernet  HWaddr 00:10:18:27:f0:80
>           inet addr:192.168.XXX.1  Bcast:192.168.23.255  Mask:255.255.255.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>
>
>
> --
> Pablo Catalina<pablo.catalina () gmail com>
> _______________________________________________
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I was chatting with Leonardo Amaral on IRC, and he was experiencing the 
same problem. I suggested the patch from 
http://seclists.org/nmap-dev/2012/q2/584 and that solved it for the 
bridge, but not the openvz interface. nmap --iflist was showing 
"INTERFACES: NONE FOUND(!)". I've CC'd him so he can reply with more 
details.

Dan
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