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PPTP port issue while VPN connecton

Posted on 2011-09-08
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Last Modified: 2012-05-12
Hi,

We are having issue while connecting to client VPN using dialup PPTP through our ASA Firewall
Pls find the screenshot of the Error Message

Regards
Ramu
pnc-vpn.PNG
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Question by:RAMU CH
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by:Ernie Beek
ID: 36501784
So you opened up the correct ports?
Did you try to disabled the statefull firewall in the VPN client?
Is anything showing in the logs of the ASA?
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by:RAMU CH
ID: 36502218
I have opened all port for the Local IP .
 WIl send you the Firewall Logs
Regards
Ramu
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by:Ernie Beek
ID: 36502292
Please do, I'll have a look then.
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by:The_Warlock
ID: 36502971
It's most likely going to be the client side firewall. Have you disabled the local software firewall on the client PC getting this error? Let us know.
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Author Comment

by:RAMU CH
ID: 36522552
Hi,

I have made a Static NAT to a LAN PC and allowed traffic from Client VPN server IP to Public Natted IP of the PC then able to connect to the VPN from the LAN but when i made dynamic NAT to the Respective Network and allowed traffic from VPN server IP to the DYnamic NAT Ip it wont connected
Is there any issue with PPTP traffic

Regards
ramu
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by:RAMU CH
ID: 36527186
Hi,

Pls reply

Regards
Ramu
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Expert Comment

by:Ernie Beek
ID: 36528707
Ah, so you are trying to connect from the outside to the inside? If that is the case you will need a one to one static. The GRE protocol needs that, it cannot be tunneled through a port in tcp (it's a whole different protocol).
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by:RAMU CH
ID: 36529524
What is GRE Protocol , what is the Purpose of that..Do we need to allow Gre port exclusively for inbund connections . is GRE is a  TCP or UDP traffic.

Will you briefly explain about that

Regards
Ramu
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by:Ernie Beek
ID: 36529652
GRE is a protocol just like TCP and UDP so it's NOT a port on Tcp/udp.
http://en.wikipedia.org/wiki/Generic_Routing_Encapsulation
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by:RAMU CH
ID: 36533814
What are the other Protocols like TCP/UDP/GRE/ICMP

Regards
ramu
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Ernie Beek earned 500 total points
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by:RAMU CH
ID: 36813569
Thanks
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