[pptp-server] IP/MAC Theft

[Charlie Brady]

On Wed, 18 Apr 2001, Trevor Benson wrote:

> Problem,
>
>    Each time I configure a RedHat 6.1 Server and enable the pptpd I start
> having IP address thefts.  Actually what is occurring is the firewalls
> internal interface starts to report that its MAC address belongs to
> different IP address's on my local network.  I originally swapped network
> cards, cables, and even into a new HP switch, to ensure the switch wasn't
> failing.  Now I have gone so far as to purchase a whole new system, and
> rebuild the VPN server.  I am experiencing the same issue with ALL new
> hardware, and IP address's.  But this system still seems to send a message
> that reports to the switch that it's MAC is attached to another IP.  Has
> anyone else here experienced this, and if so please let me know how you
> resolved it.

Have a read up on "proxyarp" - it does just what you have observed, and is
intended. It's how remote machines can talk to other machines on your
network. If you don't want that, just remove the proxyarp option.

> Mail any replies to Tbenson at associatedbp.com
> <mailto:Tbenson at associatedbp.com>  please, as I have not received anything
> from the mail list directly yet.

It's considered good form to join up to a mailing list if you are
interested in reading follow ups to your question. Otherwise you seem to
be saying "I want your help, but can't be bothered making an effort." :-)

-- 

  Charlie Brady                         charlieb at e-smith.com
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