Network sniffer shows it as multiple local network UDP transmits and
receives -- all on port 138.



John Williams




----- Original Message -----
From: "Bagotronix Tech Support" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Thursday, June 27, 2002 7:15 AM
Subject: Re: [PEDA] License Issues


> I don't know for sure how the license manager works, but I think it
probably
> uses a UDP broadcast over the LAN to "discover" other copies of the
program.
>
> If this is the case, it might be possible to block some UDP ports on your
PC
> with firewall software.  Norton Personal Firewall, perhaps?  Each machine
> would think it is the only one running Protel, so the license couldn't
> "float".  Of course, make sure you have one license for each machine you
> want to run Protel on ;-)
>
> Finding which UDP ports to block might be tricky.  Using tcpdump in Linux
> and having it filter out UDP broadcast packets would be the way I'd try it
> (if I were to do so).  Make sure you don't disable all UDP activity,
because
> Netbios uses UDP to manage Samba (Windows) networks.
>
> I don't know how this would affect your ability to share libraries.  It
> might work OK, work some, or not at all.
>
> Best regards,
> Ivan Baggett
> Bagotronix Inc.
> website:  www.bagotronix.com
>
>



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