[cisco-voip] IP Communicator and MAC Addresses.

Lelio Fulgenzi lelio at uoguelph.ca
Tue Jul 11 11:17:54 EDT 2006


So are my suspicions true in that you can use the MAC address of another IPC user and end up registering with their extension on your PC?

--------------------------------------------------------------------------------
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
"I can eat fifty eggs." "Nobody can eat fifty eggs."
  ----- Original Message ----- 
  From: Ted Nugent 
  To: Phillips, Danny 
  Cc: cisco-voip at puck.nether.net 
  Sent: Tuesday, July 11, 2006 11:16 AM
  Subject: Re: [cisco-voip] IP Communicator and MAC Addresses.


  Awesome... good to know!

  --- "Phillips, Danny" <dphillips at sapc.edu> wrote:

  > I downloaded the latest version and installed it
  > with both NIC active
  > and it is working fine.
  > 
  > Thanks
  > 
  > -----Original Message-----
  > From: Ted Nugent [mailto:tednugent69 at yahoo.com] 
  > Sent: Tuesday, July 11, 2006 10:34 AM
  > To: Phillips, Danny
  > Cc: cisco-voip at puck.nether.net
  > Subject: Re: [cisco-voip] IP Communicator and MAC
  > Addresses.
  > 
  > Interesting, I do not seem to have this problem. The
  > only difference that I can see between what you and
  > I
  > might be doing differently is that I installed IPC
  > with all of my NICs installed and enabled and I can
  > toggle between them freely? Perhaps this is a bug
  > with
  > the version of IPC you're using? Have you tried
  > upgrading to the latest and greatest version of IPC?
  > I'm running 2.0.1.1. Also are you local to CM when
  > trying this or are you trying this remotely (via vpn
  > or otherwise)? 
  > 
  > 
  > --- "Phillips, Danny" <dphillips at sapc.edu> wrote:
  > 
  > > I am using CCM 4.1(3). When I add a IP
  > communicator
  > > phone the first
  > > option is MAC Address, I put in the MAC of the
  > > laptops LAN NIC in, then
  > > load in the laptop and it works fine. If I unplug
  > > the LAN NIC and plug
  > > the wireless card the Laptop it does not register.
  > > If I then change the
  > > MAC to the wireless card's MAC it registers fine.
  > > But I cannot just
  > > change from 1 to the other. 
  > > 
  > > 
  > > Am I missing a step?
  > > 
  > > Danny
  > > 
  > > -----Original Message-----
  > > From: Ted Nugent [mailto:tednugent69 at yahoo.com] 
  > > Sent: Tuesday, July 11, 2006 10:05 AM
  > > To: Ted Nugent; Lelio Fulgenzi; Phillips, Danny;
  > > cisco-voip at puck.nether.net
  > > Subject: Re: [cisco-voip] IP Communicator and MAC
  > > Addresses.
  > > 
  > > You peaked my curiosity so I had to upgrade and
  > see
  > > what you were referring to... I still do not have
  > > the
  > > problem that you explained. I can select anyone of
  > > the
  > > 5 NIC interfaces on my laptop (as long as they're
  > > not
  > > disabled) and they auto-reg with CM fine and only
  > my
  > > wireless is active. Can you provide some more
  > > details
  > > outlining your issue?
  > > 
  > > --- Ted Nugent <tednugent69 at yahoo.com> wrote:
  > > 
  > > > I've not tried the most recent version of IPC
  > but
  > > > you
  > > > used to just leave it associated with one MAC
  > > > weather
  > > > you were running on the Wired or Wireless NIC???
  > > If
  > > > your phone was create using your Wired NIC
  > address
  > > > then you would LEAVE configured for that in IPC
  > no
  > > > mater what physical connection was active at the
  > > > time?
  > > > Are you saying that now you can ONLY configure
  > IPC
  > > > to
  > > > use only the ACTIVE NIC MAC???
  > > > 
  > > > 
  > > > 
  > > > 
  > > > 
  > > > --- Lelio Fulgenzi <lelio at uoguelph.ca> wrote:
  > > > 
  > > > > I had thought about this as well, not just
  > about
  > > > > laptop with wired or wireless, but also with
  > > home
  > > > PC
  > > > > - you'd need a different device for each. I
  > was
  > > > > thinking about a phantom MAC address that you
  > > > could
  > > > > program and configure the client with. Problem
  > > > with
  > > > > that is, you would have to make them random
  > > enough
  > > > > to (a) not interfere with actual MAC addresses
  > > and
  > > > > (b) not be easily guessed. Since there is no
  > > > > security with IP communicator, all  you need
  > to
  > > do
  > > > > is configure your client with someone else's
  > MAC
  > > > > address and you login with their phone.
  > > > > 
  > > > > If someone has found a workaround to this
  > little
  > > > > bug, or if I am totally off the wall on this,
  > > > > please, let me know!
  > > > > 
  > > > >
  > > >
  > >
  >
  ------------------------------------------------------------------------
  > > --------
  > > > > Lelio Fulgenzi, B.A.
  > > > > Senior Analyst (CCS) * University of Guelph *
  > > > > Guelph, Ontario N1G 2W1
  > > > > (519) 824-4120 x56354 (519) 767-1060 FAX
  > (JNHN)
  > > > >
  > > >
  > >
  >
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  > > > > 
  > > > > "I can eat fifty eggs." "Nobody can eat fifty
  > > > eggs."
  > > > >   ----- Original Message ----- 
  > > > >   From: Phillips, Danny 
  > > > >   To: cisco-voip at puck.nether.net 
  > > > >   Sent: Tuesday, July 11, 2006 9:32 AM
  > > > >   Subject: [cisco-voip] IP Communicator and
  > MAC
  > > > > Addresses.
  > > > > 
  > > > > 
  > > > >   I am having a problem with the IP
  > > Communicator;
  > > > my
  > > > > problem is that it is registered to the MAC
  > > > Address
  > > > > of the LAN NIC Card on a laptop. If the person
  > > > that
  > > > > uses this laptop wants to use his/her wireless
  > > > card
  > > > > then it does not see it as being registered
  > > > because
  > > > > it is a different MAC.
  > > > > 
  > > > >    
  > > > > 
  > > > >   Does any know of a work around for this, I
  > > > thought
  > > > > of maybe putting 2 for each laptop in Call
  > > Manager
  > > > > with a shared line but it seems to me there
  > > should
  > > > > be an easier way.
  > > > > 
  > > > >    
  > > > > 
  > > > >    
  > > > > 
  > > > >   Thanks,
  > > > > 
  > > > >   Danny
  > > > > 
  > > > > 
  > > > > 
  > > > >
  > > >
  > >
  >
  ------------------------------------------------------------------------
  > > ------
  > > > > 
  > > > > 
  > > > >  
  > > _______________________________________________
  > > > >   cisco-voip mailing list
  > > > >   cisco-voip at puck.nether.net
  > > > >  
  > > > >
  > > >
  > >
  > https://puck.nether.net/mailman/listinfo/cisco-voip
  > > > > >
  > > _______________________________________________
  > 
  === message truncated ===


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