PPTP (PoPToP) and strange IP Addressing

Matthew Carpenter matt
Mon May 17 12:00:45 PDT 2004


Hi all-

I am working on getting PPTPd working on a Linux system and aside from a 
few things I think we're pretty well set.
What is striking me as strange is that although the system gets assigned 
192.168.0.2 as it's "ppp address" and can communicate correctly that way 
with the remote network, the pptpd system (also running as a firewall) 
logs failed entries for the real IP Address going outbound.  Typically 
this is AIM, but sometimes IMAP and IMAPS.  I may have had those apps 
running prior to connecting to the VPN but I'm confused as to why the 
real IP addresses would show up in the logs and yet the services work.  
Is this some strange oddity with poptop or pppd so both IP's are used?  
Or could this be the proxy arp?

TIA,
Matt


Here is /etc/pptpd.conf:
----------------------------
speed 115200

option /etc/ppp/options.pptp

debug

localip 192.168.0.1
remoteip 192.168.0.2-210

pidfile /var/run/pptpd.pid


and here is /etc/ppp/options.pptp:
-----------------------------------
lock
debug

nobsdcomp
nodeflate

auth
require-chapms-v2
+chap
+chapms
+chapms-v2
mppe-128
mppe-40
mppe-stateless

mtu 1000
mru 1000

lcp-echo-failure 10
lcp-echo-interval 10

ms-dns 192.168.1.1
ms-wins 192.168.1.1

name pptpd

proxyarp



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