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how do i get a list of ip addresses for pc on a net

 
 
trevmac
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      02-07-2006, 09:52 PM
is it possible to get the ip addresses for each pc on a network ,there are
about 25 pcs on the network and i want to know each ones address,i was show
how to do it but i cant not remember,i know you type some thing in the
start- then run ,most of the pcs are win xp pro and the rest are win 98 (all
on mshome)what other advice can you give about changing some of the
addresses,i cant tell you much else as i am no good at networking,any sites
that are any good?
thanks


 
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Dave J.
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      02-08-2006, 01:53 PM
In MsgID<dsb8aj$gp8$(E-Mail Removed)> within
uk.comp.home-networking, 'trevmac' wrote:

>is it possible to get the ip addresses for each pc on a network ,there are
>about 25 pcs on the network and i want to know each ones address,i was show
>how to do it but i cant not remember,i know you type some thing in the
>start- then run ,most of the pcs are win xp pro and the rest are win 98 (all
>on mshome)what other advice can you give about changing some of the
>addresses,i cant tell you much else as i am no good at networking,any sites
>that are any good?
>thanks


It used to be possible to do a ping to your subnet's broadcast address,
but it seems that my switch doesn't forward such. Perhaps try it on yours?

Say the network is 10.20.10.0/8 you'd try a ping to 10.20.10.255 and see
what responses you receive. It probably won't work, but I've only just
discovered that my switch doesn't forward broadcasts, it merely responds
in its own right.

I'll be interested to hear what happens on your network.
I've probably just forgotten the relevant section of the networking course
I did..

Dave J.
 
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Chris Davies
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      02-08-2006, 02:14 PM
Dave J. <(E-Mail Removed)> wrote:
> Say the network is 10.20.10.0/8 you'd try a ping to 10.20.10.255 and see
> what responses you receive. It probably won't work, but I've only just
> discovered that my switch doesn't forward broadcasts, it merely responds
> in its own right.


That must be a faulty switch, then. Switches *must* forward broadcasts
to all connected devices, because otherwise they're not broadcasts.

If your switch is a managed device and has its own IP, then I would expect
it to respond to a broadcast ping (along with everything else). Otherwise
it should be silent and just get on with switching packets.

Chris
 
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ric
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      02-08-2006, 02:14 PM
what are you actually trying to do?
if in a server environment and on DHCP, is it enough to know the DHCP
lease scope range of possible IPs? if on a SoHo type arrangement with
a basic router, logging into the router admin page will probably tell
you which IPs are leased out.
if it's on a PC by PC basis, if you ping the machine name from a
central location, it'll return the IP address.
if you want to do it by visiting each PC, start...run...cmd and
"ipconfig /all" will tell you...

 
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Rob Morley
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      02-08-2006, 02:19 PM
In article <dsb8aj$gp8$(E-Mail Removed)>
trevmac <(E-Mail Removed)> wrote:
> is it possible to get the ip addresses for each pc on a network ,there are
> about 25 pcs on the network and i want to know each ones address,i was show
> how to do it but i cant not remember,i know you type some thing in the
> start- then run ,most of the pcs are win xp pro and the rest are win 98 (all
> on mshome)what other advice can you give about changing some of the
> addresses,i cant tell you much else as i am no good at networking,any sites
> that are any good?
>

If you're no good at networking why are you trying to reconfigure a
network?
 
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Flunkett Clogwheel
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      02-08-2006, 03:08 PM

"Rob Morley" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) t...
> In article <dsb8aj$gp8$(E-Mail Removed)>
> trevmac <(E-Mail Removed)> wrote:

"> If you're no good at networking why are you trying to reconfigure a
> network?"


Most people I have come accross working in IT are no good, and paid for it
too, so leave the guy alone.


 
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Rob Morley
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      02-08-2006, 04:55 PM
In article <gIoGf.58498$(E-Mail Removed)>
Flunkett Clogwheel <(E-Mail Removed)> wrote:
>
> "Rob Morley" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) t...
> > In article <dsb8aj$gp8$(E-Mail Removed)>
> > trevmac <(E-Mail Removed)> wrote:

> "> If you're no good at networking why are you trying to reconfigure a
> > network?"

>
> Most people I have come accross working in IT are no good, and paid for it
> too, so leave the guy alone.
>

It just seems strange that someone who can't find the machines, or give
any details of the setup, is about to change settings that could screw
up 25 users. It makes me wonder if he's supposed to be doing it at all.
 
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Alex Fraser
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      02-08-2006, 05:00 PM
"Dave J." <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
[snip]
> It used to be possible to do a ping to your subnet's broadcast address,
> but it seems that my switch doesn't forward such.


Not necessarily. Windows machines seem to ignore ICMP echo requests directed
at their subnet broadcast address. Google "smurf attack" for the probable
reason.

> Say the network is 10.20.10.0/8 you'd try a ping to 10.20.10.255 and see
> what responses you receive.


ITYM 10.20.10.0/24 (that is, a subnet mask with 24 ones: 255.255.255.0).

Alex


 
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robert
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      02-08-2006, 08:55 PM
On Wed, 8 Feb 2006 17:55:16 -0000, Rob Morley <(E-Mail Removed)>
wrote:

>In article <gIoGf.58498$(E-Mail Removed)>
>Flunkett Clogwheel <(E-Mail Removed)> wrote:
>>
>> "Rob Morley" <(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed) t...
>> > In article <dsb8aj$gp8$(E-Mail Removed)>
>> > trevmac <(E-Mail Removed)> wrote:

>> "> If you're no good at networking why are you trying to reconfigure a
>> > network?"

>>
>> Most people I have come accross working in IT are no good, and paid for it
>> too, so leave the guy alone.
>>

>It just seems strange that someone who can't find the machines, or give
>any details of the setup, is about to change settings that could screw
>up 25 users. It makes me wonder if he's supposed to be doing it at all.


Not an unusual situation with a small old network ( no server) which
has developed over a few years especially if as machines have been
upgraded and moved around "users" kept old ip addresses.
You might want to know what addresses have been used before adding
more machines etc.

However unless getting to them all is a problem I would visit each one
- probably quicker than spending the time finding a way to do it
remotely !

Robert
 
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trevmac
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      02-08-2006, 10:09 PM
well thanks for all the advice I know some think it is strange me asking but
when a small company/school cant afford to pay some one £60 an hour they
ask some one who knows computers,I don't know anything about networking
that's why im asking but I do know how to repaired and set up computers and
what some it Tec cant do is know how to use most software so networking is
new to me ,im not going to screw up the network but just wont to know the ip
addresses of the pc so I can add some more on to the network,I thought it
world just help knowing each pc ip address so I cant use one that is already
being used as that would screw the network up.thanks all who replied I will
try some of the things mentioned and I wont do any thing im not sure of.
thanks again its all been help full advice.
trev
<robert> wrote in message news:(E-Mail Removed)...
> On Wed, 8 Feb 2006 17:55:16 -0000, Rob Morley <(E-Mail Removed)>
> wrote:
>
>>In article <gIoGf.58498$(E-Mail Removed)>
>>Flunkett Clogwheel <(E-Mail Removed)> wrote:
>>>
>>> "Rob Morley" <(E-Mail Removed)> wrote in message
>>> news:(E-Mail Removed) t...
>>> > In article <dsb8aj$gp8$(E-Mail Removed)>
>>> > trevmac <(E-Mail Removed)> wrote:
>>> "> If you're no good at networking why are you trying to reconfigure a
>>> > network?"
>>>
>>> Most people I have come accross working in IT are no good, and paid for
>>> it
>>> too, so leave the guy alone.
>>>

>>It just seems strange that someone who can't find the machines, or give
>>any details of the setup, is about to change settings that could screw
>>up 25 users. It makes me wonder if he's supposed to be doing it at all.

>
> Not an unusual situation with a small old network ( no server) which
> has developed over a few years especially if as machines have been
> upgraded and moved around "users" kept old ip addresses.
> You might want to know what addresses have been used before adding
> more machines etc.
>
> However unless getting to them all is a problem I would visit each one
> - probably quicker than spending the time finding a way to do it
> remotely !
>
> Robert



 
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