Re: [coLinux-users] Private Network and wireless trouble

[<Use...@zo...>]

dis...@bo...(Mike)  06.04.08 13:30

Once upon a time "Mike " shaped the electrons to say...

http://www.securitypronews.com/it/networksystems/spn-21-20030731Windows2000ICSNATandIAS.html

    The machine on which ICS is configured is actually acting as a
    Network Address Translation (NAT) server.  

    In a nutshell, Network Address Translation is usually used to
    translate between two connected ranges of IP addresses, usually
    one that is using a public IP address, and the other which is
    using a private address range.  

    The `external' interface has a real IP address, and

    the internal interface is given the 
    private address *192.168.0.1*.  

    The system also acts as a sort of mini DHCP server, handing out
    IP addresses in the 192.168.0.0/24 range to clients on the
    internal network.

    To that end, clients use the addresses received, pointing to
    the 192.168.0.1 interface as their default gateway.  The ICS
    system also does a DNS proxy function, meaning that all client
    hostname resolution requests will be forwarded to the ICS
    system for resolution via the configured external DNS
    parameters.


So i assume:
NAT does not work, the pakets from 192.168.100.2 are simply forwarded to
the default gateway, which hapens to be your DNS server.

Let DHCP determine the IP of the guest
or choose 192.168.0.x

instead of endless guessing:
Install wireshark and see which IPs are used where.




> +-----------------------+      +------------------------+
> | coLinux (guest)       |      | WinXP (host)           |
> |                       |      | wtap0: (Win-TAP32)<-+  |
> | eth0:                 |      | IP:192.168.100.1    |  |
> | IP 192.168.100.2   <--|------|-->                  |  |
> | gateway: 192.168.100.1|      |                   ICS  |
> +-----------------------+  +---|-->                  |  |
>                            |   | PhysicalNetwork:  <-+  |
>                            |   | IP:192.168.2.10 (wifi) |
>                            |   | gateway: 192.168.2.254 |
>                            |   +------------------------+
>                            |   +------------------------+
>                            |   | lan router (netgear)   |
>                            |   | 192.168.2.254          |
>                            +---|-->                     |
>                                |                        |
>                            +---|-->                     |
>                            |   | IP: 192.168.1.253      |
>                            |   | gateway: 192.168.1.254 |
>                            |   +------------------------+
>                            |
>                            |   +------------------------+
>                            |   | ADSL router (speedtouch|  +----------------+
>                            |   | IP:192.168.1.254       |  |                |
>                            +---|-->                 <---|--|other lan router|
>                                |                        |  |IP:192.168.1.252|
> +------------------------+  +--|-->                     |  +----------------+
> | Provider               |  |  | Dynamic IP (DHCP):     |
> |                     <--|--+  |                        |
> |                        |     |                        |
> +------------------------+     +------------------------+
>  

=============================================================


>>>Destination     Gateway         Genmask         Flags Metric Ref Use
>>>Iface 192.168.100.0   *               255.255.255.0   U     0      0
>>>0 eth0 default         192.168.100.1   0.0.0.0         UG    0
>>>0 0 eth0
>>
>> /etc/resolv.conf?
>nameserver 192.168.2.254

Rainer---<=====>                         Vertraulich
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