Hi All,
Please check this out... we have a pix firewall in our office with a frame-relay
connection... at the branch office we are connected Via an ADSL Lucent Cell pipe
router... All the configurations on the router were done by the service provider....
and he informed us to use the default gateway of 192.168.0.10 for our LAN there... now
the problem is that we cannot establish a PPTP connection between the firewall and the
Win 2K clients thru the ADSL and the LAN ... but when we use dial up coonections and
use the services of the same ISP... we can establish the VPN connection...
At the firewall end I can see that the client gets connected for some time.. and then
is disconnected... on the client side I see the dialg that the machine is trying to
connect to the remote host.. then says.. verifying username and password and then
after some time I get the error that says... The L2TP connection attempt failed
becasue the security layer encountered a processing error during initial negotiations
with the remote computer....
Actually this LAN is being set up by a Novice.. but very Enthusiast .. Sys Admin ..
from our branch office.. and so far he had been telling me that the remote client only
attempts to connect to the firewall... he gets the verifying username and password
screen and then it tels him that the username and the password is bad... .. till I had
to force him to allow me to use PCANywhere and dial into one of the clients... and
check myself what was happening from that end.. when I noticed this...
I feel that this has to do with ... the Win 2000 domain security... I feel that he has
set up the domain and all the machines there on the network to be forced to use IPSec
and since the IPSec policy is being applied to the LAN cards... but not to the dial up
modem interfaces.. I am getting the error mentioned.... But if you guys can help me
with this.,... please do..
I get the error 789 on the Win 2K server.. where in I set up the machine for PPTP with
secure connection as an option.. since the firewall has been set up at the moment to
allow PPTP connections.... I have myself treid it out on a ADSL connection .. but from
a different Service provider and it appears to work fine...
CAN it be a NAT issue... but logically again.. I feel it is not.. since I have
configured for a WIndows RRAS server... on a LAN with an ADSL connection and have
succesfully established a VPN conneciton from all the clients ... .. so I feel that
the NATtting is not an issue here... unless this ISP is blocking some ports..
Can some one please throw more light on this
Regards
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