Re: RE: MAC Address

Stick with just dealing with ip's. Trying to deal with MAC's will drive you 
nuts. Especially when you networks. Ethernet, Tokenring, Dialup, Wireless, 
Firewals.  I assume the handhelds have some type of authentication (user logon) 
so you know who you dealing with.

11/21/2003 11:05:44 AM, "Andy Holmer" <aholmer@xxxxxxxxxx> wrote:

>I must admit that I didn't think about a proxy or a firewall changing
>the MAC address in the packet.  Maybe I should take a step back and
>explain a little more of the picture.
>
>I have RF devices that connect to an RPG socket program.  The program
>monitors an ERP database file for records to send to the handheld.  The
>ERP has a naming convention that is uses for processing, and I need to
>be sure that the device that connects receives only the records that
>were intended for it.  I am also writing the client/device piece so I
>had been retrieving the MAC address with the client program and sending
>it to the RPG program for a match.  The problem with that is if I
>support 5 platforms, I need to write the MAC retrieval piece 5 times, so
>I wondered about putting the logic back on the server in the RPG
>program.  So I guess my options are:
>
>1) Use IP address and require that all connecting devices have static
>IPs
>2) Write the MAC retrieval portion of code for all the different client
>platforms and send it as text to the socket program.
>3) Some RPG scheme that hasn't been introduced yet.......
>
>Thanks in advance,                     
>Andy Holmer
>
>-----Original Message-----
>From: Rich Duzenbury [mailto:rduz-midrange@xxxxxxxxxxxxxxxxxxx] 
>Sent: Thursday, November 20, 2003 11:55 AM
>To: RPG programming on the AS400 / iSeries
>Subject: Re: MAC Address
>
>At 10:18 AM 11/20/03, you wrote:
>>Is there any way to tell the MAC address of the client that is
>connected
>>to my RPG program?  I need to be able to determine if that client has
>>connected previously and I can't use the IP address because of DHCP.  I
>>am open to other suggestions as well.
>>
>>
>
>Hmm.  I don't know the answer, but it seems that a MAC address won't be
>a 
>necessarily unique identifier.  What if someone connects through a
>gateway 
>or proxy?  Your program will see the gateways MAC address, not the 
>end-users.  What if the user has to change their network card?  What if
>the 
>user connects from a home PC or work PC?
>
>The only way to know if a user is connected again is to record their
>user 
>id.  You will have to set up a user id /password mechanism for the most 
>accurate results.
>
>Regards,
>Rich 
>
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Jason Kleinemas
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