Update for "Poptop Questions & Answers"

[Marcin Struzak]

Apologies if this is already answered and reported elsewhere; comments below
refer to the version at http://poptop.sourceforge.net/dox/qna.html, dated of
2005-11-16

For question 3 (I can connect to the server and ping to it fine, but I can't
ping any other hosts on the office subnet. I have ip-forwarding turned on
and I have proxyarp set in the ppp/options file. What can be wrong?),
specifically the portion dealing with proxy ARP when using an address block
different from the one on the LAN, the author suggests manually adding a
proxy ARP entry from ip-up.local.  This works fine, but the suggested
command
  arp --set $REMOTE_IP_ADDRESS 00:60:08:98:14:14 pub requires the knowledge
of the MAC address of the card; if the card is ever replaced, one must
remember to change this or it will stop working.  Under Fedora 10 (kernel
2.6.27 and arp from net-tools-1.60), it is possible to use the following
syntax, which refers to the index of the card (something that has much
lesser chances to change):

  arp --use-device --set $REMOTE_IP_ADDRESS eth0 pub

The author also complains that he could not remove an entry added this way
in a symmetric ip-down.local script.  After hitting the same issue, and some
research, I found out that for removal of a proxy ARP entry the
corresponding interface must be specified.  The corresponding command is:

  arp --delete $REMOTE_IP_ADDRESS --device eth0 pub

Comments and questions are welcome.

--Marcin


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--- "Marcin Struzak" <marcin@...> escreveu:
> Apologies if this is already answered and reported elsewhere; comments
> below refer to the version at http://poptop.sourceforge.net/dox/qna.html,
> dated of 2005-11-16
>
> For question 3 (I can connect to the server and ping to it fine, but I
> can't  ping any other hosts on the office subnet. I have ip-forwarding
> turned on and I have proxyarp set in the ppp/options file. What can be
> wrong?), specifically the portion dealing with proxy ARP when using an
> address block  different from the one on the LAN,

If your client-assigned IP addresses are outside the server LAN range
you'll need routing of that IP addresses at your LAN gateway (pointing
to the PPTP server) OR NAT'ing the assigned IP addresses to the
server LAN IP

Hope this helps
Cheers
!3runo
from Brazil


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