[Techtalk] LAN IP addresses changed after router reset

[Berenice]

Hi Sarah

I'm using a Billion 7401VGP router/modem. 
It says that the active pcs in my LAN are:
192.168.1.3 (windows box)
192.168.1.4 (iBook)
192.168.1.5 (debian box)

Pinging 192.168.1.1 and 2 got a "request timed out" result. Pinging the router
(254) works fine, so if 192.168.1.1 were also the router IP it should reply.

An Nmap scan on 192.168.1.1 and 2 said "host appears to be down". 

What puzzles me is why my computers suddenly changed IP addresses. I've had
this router for a while and the IP addresses have remained the same whenever
I've restarted the router.
 
The reason I prefer to have my boxes numbered 1,2,3 is that it's easier to
remember. I've also recently set up a samba share on the Debian box, and 
changing IP addresses may affect it (I'm going to check the smb.conf later. I
don't know exactly how samba was configured because it was done automatically
when I installed Debian).

cheers
Berenice

--- Sarah Newman <newmans at sonic.net> wrote:

> What router are you using?
> 
> A lot of routers default to 192.168.1.1 as their IP.
> 
> If it bothers you to have the IP addresses change, it is often possible 
> to assign an IP address to a given MAC.
> 
> Usually the router can tell you itself what devices are connected. 
> Otherwise nmap can be used to scan for devices on the network.
> 
> We have a WRT54G and flashed it with new firmware to support some of the 
> above features.  You might have that option with your router too if it 
> doesn't already have them (but be prepared to buy another router if that 
> doesn't work.)
> 
> Berenice wrote:
> > Hi All
> > 
> > This morning I reset my router/modem because I forgot the password.
> > Now I've found that the IP addresses in my home network have been changed,
> and
> > I don't know why.  Perhaps someone here might know.
> > 
> > The IP range I use is: 192.168.1.1 - 192.168.1.254
> > 254 is the router.
> > 
> > Previously the assigned addresses for computers in my network were:
> > iBook = 1
> > Windows XP box = 2
> > Debian box = 3
> > 
> > Now they are:
> > Windows XP box = 3
> > iBook = 4
> > Debian box = 5
> > 
> > How can I find out which devices, if any, are now using 1 and 2?
> > Also my iBook is now connected to the LAN via ethernet instead of the usual
> > wireless (this was to troubleshoot connecting to a samba share on the
> debian
> > box, which is another problem I might post about later).  Might that have
> > something to do with the renumbering?
> > 
> > 
> > Thanks
> > Berenice
> > 




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