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Re: [LUG] Urgent network help please

 


Sent from my iPhone

> On 15 Nov 2014, at 14:25, rich@xxxxxxxxxxx wrote:
> 
>> On 2014-11-15 14:21, Martijn Grooten wrote:
>> On Sat, Nov 15, 2014 at 02:15:34PM +0000, rich@xxxxxxxxxxx wrote:
>> There are two networks set-up. The internal network uses 10.0.0.250
>> as a gateway and is running static addresses.
>> Thanks. Two questions:
>> 1. which machine, if any, has IP address 10.0.0.250? If you don't know,
>> can you at least find out (by pinging) if there is such an IP address on
>> the network in the first place.
>> 2. how is the router connected to that internal network?
>> Martijn.
> 
> 1. No machine and it isn't recognised.

use nmap to scan the network
set you local nic to the same network and mask - but an unused ip ie .21 


> 
> 2. The router is cabled to the switch that runs the internal network.
> 

switches dont have config - the network is configured via dhcp from eother the 
router or a server. 

think of a switch as just a very smart join in the wire. 

if there is a server with (dual home) configuration the server. will "bridge and 
forward" the lan traffic. 

uf the is no server or the server is dumb but has a static ip. that ip will indicate 
the range and netmask to use for the inside edge of the router. the outside will be 
pivked up from the isp. 

> Thanks
> 
> Rich
> 
> 
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