[pptp-server] Dual-NIC Server Problem

[Brian Free]

I think you are correct, but the solution a found was to simply add ktune to
the ppp options.  Below is an excerpt from the man pages on pppd that I
found.  Once I added this option, it all started working.  Thanks for your
input.

ktune  Enables  pppd  to  alter  kernel  settings as appropriate.
              Under Linux, pppd will  enable  IP  forwarding  (i.e.  set
              /proc/sys/net/ipv4/ip_forward to 1) if the proxyarp option
              is used, and will enable the  dynamic  IP  address  option
              (i.e.  set  /proc/sys/net/ipv4/ip_dynaddr  to 1) in demand
              mode if the local address changes.

-----Original Message-----
From: pptp-server-admin at lists.schulte.org
[mailto:pptp-server-admin at lists.schulte.org]On Behalf Of Mike Peel
Sent: Wednesday, September 06, 2000 9:21 AM
To: brian at freenetwork.ws
Cc: pptp-server at lists.schulte.org
Subject: Re: [pptp-server] Dual-NIC Server Problem


I think you need to establish a ROUTE on the host through the tunnel ??

I'm guessing a bit here.

Mike Peel

Brian Free wrote:

> Here is my configuration:
>
> 192.168.8.142     192.168.56.10    192.168.56.11 External NIC
>                                              192.168.4.1   Internal NIC
192.168.4.2
>  ________          _______           ______                      _____
> |        |        |       |         |      |                    |      |
> | client |------->| fire  |-------->| pptp |------------------->| host |
> |        |        | wall  |         | srvr |                    |      |
> |________|        |_______|         |______|                    |______|
>     H                                   H
>     H                                   H
>     H                                   H
>     H===================================H
> 192.168.4.240    pptp connection     192.168.4.250
>
> I am able to connect to the pptp server and can ping both ethernet
> interfaces on that server, but I can't ping the inside host.  I have
checked
> the arp table and it shows 192.168.4.240 as being eth1 which is the
Internal
> NIC.  I have proxyarp set in the options file and have tried every other
> option that looked pertinent.  I have also verified that the firewall is
not
> causing any problems.  The pptp server is able to ping the host and the
VPN
> client at 192.168.4.240.  The pptp server is not setup to route between
the
> 192.168.56 and the 192.168.4 networks, and it isn't obvious to me that it
> should have to be.  I'm stumped.  Any help would be greatly appreciated.
>
> Thanks in advance,
>
> Brian Free
> brian at freenetwork.ws
>
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