[101737] in RedHat Linux List
IP Masquerading and BayNetworks VPN solution.
daemon@ATHENA.MIT.EDU (Israel Blacklock)
Sat Nov 28 22:32:57 1998
From: izzyb@freenet.edmonton.ab.ca (Israel Blacklock)
To: redhat-list@redhat.com
Date: Sun, 29 Nov 1998 03:38:34 GMT
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com
I have a small network setup at home consisting of a linux server a
W95 desktop, and a W95 laptop. My linux server has a cable connection
to the internet, and with IP Masquerading acts as a gateway for the
other computers to the internet. I've had the configuration running
for some time now without much trouble. Until now.
My company recently decided to use VPN to allow us to connect to the
company WAN with a local ISP instead of calling a 1-800 number. The
solution they choice was Baynetworks' Contivity Extranet Switch. =20
The problem I have is that I can't seem to get it to work with IP
Masquerading. It works just fine with my Dial-up ISP, but it fails to
establish a connection over my LAN using ip-masquerading.
I've used tcpdump to try to see what's going on, but it's been less
then informative. The only info I was able to get from it is that the
client is sending a request from udp port 500 to port 500 on the
server. If I enable IP Masquerading, the source port changes of
course and the packet is sent to the host on udp port 500, but I don't
hear anything back from the server - on any port. =20
I'm guessing this is because the switch is ignoring any packets that
don't come from port 500, but I don't know for sure. I'd love to get
a look at what packets come back from a connection that is working,
but I can't seem to find a utility like tcpdump that runs in windows.
:( Is there such a beast?
Has anyone had any success using IP-Masquerading for such a
connection? Have I missed something? =20
Bye for now,
Israel Blacklock (Izzy)
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