[pptp-server] proxy arp controlling internal LAN Address's

Charlie Brady charlieb at e-smith.com
Wed Apr 18 18:01:26 CDT 2001


On Wed, 18 Apr 2001, Trevor Benson wrote:

> Here is the following configuration files for Poptop.  I have reviewed and
> all the settings seem to be viable, can anyone point out why this would be
> responding for address's that are listed as local?  The address's it tries
> to steal are 192.168.1.2 and 192.168.1.6 both are internal systems that are
> being accessed by VPN clients on the back end.  Every few hours I have a
> burst of ARP traffic where this machine is proxying for the internal
> systems, not the external clients.  Am I missing something in the config
> file that would point this out to me?  Any assistance is appreciated, or
> pointers to documentation on how to configure proxy arp individually to lock
> it down.  Thanks for any assistance ahead of time.
>
>
> ----/etc/ppp/options.pptp----
> lock
> debug
> auth
> +chap
> proxyarp
> ms-wins 192.168.1.6
>
> ----/etc/pptpd.conf----
> debug
> option /etc/ppp/options.pptp
> localip  192.168.1.1-64,192.168.1.116-254

Here is your problem. Replace this with just:

localip 192.168.1.x

where 192.168.1.x is the IP address of your server (192.168.1.1?).

You are confusing your PPTP server by allowing it to choose already-taken
IP addresses for the local end of connections it creates.

-- 

  Charlie Brady                         charlieb at e-smith.com
  http://www.e-smith.org (development)  http://www.e-smith.com (corporate)
  Phone: +1 (613) 368 4376 or 564 8000  Fax: +1 (613) 564 7739
  e-smith, inc. 1500-150 Metcalfe St, Ottawa, ON K2P 1P1 Canada





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