Any way to monitor the devices using my Wi Fi network?

I have a wired LAN and a Linksys WRT54GS ver 7 router. I occasionally
use a laptop wirelessly, with 2 wired PC's.

Is there a utility or some way through the Linksys set-up web pages to
get a listing of wireless devices that may be using my network? Just to
keep an eye on things ..?

Aloke Prasad <(E-Mail Removed)> hath wroth:

>I have a wired LAN and a Linksys WRT54GS ver 7 router. I occasionally
>use a laptop wirelessly, with 2 wired PC's.
>
>Is there a utility or some way through the Linksys set-up web pages to
>get a listing of wireless devices that may be using my network? Just to
>keep an eye on things ..?

Sorta. The DHCP client table will show all clients that the router
assigned an IP address. See:
<http://www.linksysdata.com/ui/WRT54G/v5/1.00.6/StaLan.htm>
However, it will not show anything if the client assigned itself a
static IP address. It also won't distinguish between wired and
wireless connections.

Much better is Airsnare:
<http://home.comcast.net/~jay.deboer/airsnare/>
However, that requires that you run a monitoring PC continuously.

Unfortunately, you have the WRT54GS v7, which uses an Atheros chipset,
instead of Broadcom, and therefore does not support alternative
firmware. If it was v4 or earlier, you could install DD-WRT firmware,
and monitor the connection with SNMP, syslog, or one of the built in
status web pages. For example, my home router at:
<https://home.learnbydestroying.com:8080/>


--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann wrote:
> Aloke Prasad <(E-Mail Removed)> hath wroth:
>
>> I have a wired LAN and a Linksys WRT54GS ver 7 router. I occasionally
>> use a laptop wirelessly, with 2 wired PC's.
>>
>> Is there a utility or some way through the Linksys set-up web pages to
>> get a listing of wireless devices that may be using my network? Just to
>> keep an eye on things ..?
>
> Sorta. The DHCP client table will show all clients that the router
> assigned an IP address. See:
> <http://www.linksysdata.com/ui/WRT54G/v5/1.00.6/StaLan.htm>
> However, it will not show anything if the client assigned itself a
> static IP address. It also won't distinguish between wired and
> wireless connections.
>
> Much better is Airsnare:
> <http://home.comcast.net/~jay.deboer/airsnare/>
> However, that requires that you run a monitoring PC continuously.
>
> Unfortunately, you have the WRT54GS v7, which uses an Atheros chipset,
> instead of Broadcom, and therefore does not support alternative
> firmware. If it was v4 or earlier, you could install DD-WRT firmware,
> and monitor the connection with SNMP, syslog, or one of the built in
> status web pages. For example, my home router at:
> <https://home.learnbydestroying.com:8080/>

What about the logging feature of the Linksys router. Is that any good
in identifying a list of client MAC addresses connecting through it, say
over the last 24 hours.

Aloke
--
remove the numbers and invalid in my return address to send me email

Aloke Prasad <(E-Mail Removed)> hath wroth:

>What about the logging feature of the Linksys router. Is that any good
>in identifying a list of client MAC addresses connecting through it, say
>over the last 24 hours.

The built in logging feature of the WRT54G v7 stays in the router.
Unlike other models that have syslog, this one requires that you login
to the router and view the data locally. I don't have a v7 handy and
can't tell you what it displays. The headings show "incoming IP
address" and "port number", which does not include MAC addresses.
Sorry.

Most such monitoring schemes require that the router support SNMP or
syslog. For example:
<http://www.linklogger.com/linksys_setup.htm>
Note the "send log to...." setting. That's a problem as the WRT54G v7
mutation does NOT have this feature. See settings at:
<http://www.linksysdata.com/ui/WRT54G/v5/1.00.6/Log.htm>

Other than sniffing the traffic between the WRT54G and the DSL or
cable modem with AirSnare, I can't think of a way to do it with your
current router.


--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann wrote:
> Aloke Prasad <(E-Mail Removed)> hath wroth:
>
>> What about the logging feature of the Linksys router. Is that any good
>> in identifying a list of client MAC addresses connecting through it, say
>> over the last 24 hours.
>
> The built in logging feature of the WRT54G v7 stays in the router.
> Unlike other models that have syslog, this one requires that you login
> to the router and view the data locally. I don't have a v7 handy and
> can't tell you what it displays. The headings show "incoming IP
> address" and "port number", which does not include MAC addresses.
> Sorry.
>
> Most such monitoring schemes require that the router support SNMP or
> syslog. For example:
> <http://www.linklogger.com/linksys_setup.htm>
> Note the "send log to...." setting. That's a problem as the WRT54G v7
> mutation does NOT have this feature. See settings at:
> <http://www.linksysdata.com/ui/WRT54G/v5/1.00.6/Log.htm>
>
> Other than sniffing the traffic between the WRT54G and the DSL or
> cable modem with AirSnare, I can't think of a way to do it with your
> current router.

Thanks for the help. I remember the logging in the ancient BEFSR41
allowed me to send the log to an IP address, where some 3rd party
freeware would make it viewable with ease.

I can't imagine that this would take a lot of overhead. I wonder why
Linksys is skimping on features like this ...

Anyway, cest la vie, I suppose.

Aloke
---

Aloke Prasad <(E-Mail Removed)> hath wroth:

>I remember the logging in the ancient BEFSR41
>allowed me to send the log to an IP address, where some 3rd party
>freeware would make it viewable with ease.

The BEFxxx series was unique in that it would generate SNMP broadcasts
with all kinds of useful info. I use Log Viewer 2.1:
<http://svs.sv.funpic.de>
for these devices. BEFSR11, BEFW11S4, BEFSR41, BEFSX41, BEFSR81,
BEFVP41, WAG54G, WAG54G, Linksys/Vonage RT31P2. It produces some
really nifty output. However, there's no alarm or trap sent for when
someone new logs in. You can attach a script to the program, that
will do that, but nothing built in.

>I can't imagine that this would take a lot of overhead. I wonder why
>Linksys is skimping on features like this ...

My guess is perhaps less the 1 in a 1000 users of these products
actually does any serious monitoring. The probably didn't include it
because it used RAM, and RAM is allegedly expensive according to
Linksys. As the product line progresses, the bottom of the line
Linksys products arrive with less and less RAM, I guess to save cost.
I don't approve of this, but that's what management apparently things.

>Anyway, cest la vie, I suppose.

Ce n'est pas bon.

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann wrote:

<snip>
> The BEFxxx series was unique in that it would generate SNMP broadcasts
> with all kinds of useful info.

I had to disable SNMP traps until I have hierarchical logfile storage
setup; there were 35MB of traps from the BEF router in one month with
very low wireless activity -- think of the volume in a busy setting

Regards,

Michael