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Standard User MHC
(sensei) Wed 22-Jan-14 13:46:17
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IP address


[link to this post]
 
I have several WAPs running on this network - all have fixed local IPs and different SSIDs.

One of the WAPs is giving problems but is not easy to physically access. I am trying to access it across the network but either cannot remember the IP address correctly or it has changed. The IPs are outside the DHCP range and follow a pattern but I cannot locate it. I can get access through it - but it is slow.

Any ideas how to find out the IP address? Yes, "ping -n 1 xxx.yyy.zzz.000" "ping -n 1 xxx.yyy.zzz.001" "ping -n 1 xxx.yyy.zzz.002" is one way but anything else?


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M H C


taurus excreta cerebrum vincit
Standard User BatBoy
(legend) Wed 22-Jan-14 13:50:08
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Re: IP address


[re: MHC] [link to this post]
 
Network device scanner, e.g. Solarwinds?


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Edited by BatBoy (Wed 22-Jan-14 13:50:31)

Standard User panda
(committed) Wed 22-Jan-14 13:54:23
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Re: IP address


[re: MHC] [link to this post]
 
Try
arp -a
from a Windows CLI.
It will list reachable addresses within the same network.

Eats shoots and leaves.


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Standard User MHC
(sensei) Wed 22-Jan-14 14:10:52
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Re: IP address


[re: panda] [link to this post]
 
In reply to a post by panda:
Try
arp -a
from a Windows CLI.
It will list reachable addresses within the same network.


That's it!

The APs are normally .14x or .16x depending on model. This one has come back as .191 ! A little odd and I might have got there. I had tried all the .14x .15x .16x .and 17x options ... I should have gone further.


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M H C


taurus excreta cerebrum vincit
Standard User MHC
(sensei) Wed 22-Jan-14 14:11:36
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Re: IP address


[re: BatBoy] [link to this post]
 
Thx, panda's arp -a sorted it.


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M H C


taurus excreta cerebrum vincit
Standard User XRaySpeX
(eat-sleep-adslguide) Thu 23-Jan-14 14:26:19
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Re: IP address


[re: panda] [link to this post]
 
Why does arp find my router and Internet radio but not PCs? Is it their firewalls?

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Standard User greenglide
(experienced) Thu 23-Jan-14 15:20:00
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Re: IP address


[re: XRaySpeX] [link to this post]
 
In reply to a post by XRaySpeX:
Why does arp find my router and Internet radio but not PCs? Is it their firewalls?


Because arp -a shows the arp table built by the device? If the device you are doing it on has never needed do send out an arp request for the IP address of the PCs (to establish their MAC address) then they would not be in the cached table?

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Standard User XRaySpeX
(eat-sleep-adslguide) Fri 24-Jan-14 02:29:48
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Re: IP address


[re: greenglide] [link to this post]
 
Ah yes, I see, I think!

Once I got the PC I'm using to view filestore of the other PC across the LAN, the other PC appeared in the arp of this PC.

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC
Standard User noppix1
(learned) Fri 24-Jan-14 03:06:51
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Re: IP address


[re: MHC] [link to this post]
 
In this situation I would use cain and able. Although seen as a hacking tool it is a very powerful program when resolving a network. After a scan it will resolve all of the i.p`s on the network along with the mac and sometimes the device names too.
Standard User prlzx
(experienced) Sat 25-Jan-14 21:25:03
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Re: IP address


[re: XRaySpeX] [link to this post]
 
Briefly PING the broadcast address of the network, not for long, a few seconds will do.
On Linux this may require the use of the -b (broadcast) and -I (interface) parameters.

Not recommended on other people's networks in case they don't manage a PING broadcast well.

This should help populate the ARP table with devices in the subnet so you will have a list of IP and MAC address.
You can try variations of arp with the switches -a -n -v (depending on OS).

Or Fing is pretty good especially on a smartphone or tablet.



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prlzx on iDNET: ADSL2+ / 21CN at ~4Mbps / 700kbps with IP4/6

Edited by prlzx (Sat 25-Jan-14 21:26:46)

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