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VPN. Port 0 denied.

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All Forums >> [ISA Server 2004 General ] >> ISA 2004 SBS >> VPN. Port 0 denied. Page: [1]
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VPN. Port 0 denied. - 17.Jan.2007 3:23:20 PM   


Posts: 4
Joined: 9.Mar.2006
Status: offline
Hi to all and sorry for my english.
I have Sbs 2003 Premium R2 and i  have made vpn tunnel with Dlink DFL-200.
In the ISA Server 2004:
Sud IP:
Nord IP:
Step to prepare VPN connection
New Network:
Addresses= to
Connection from external IP of remote DLINK to nord interface of ISA
IPSec setting= default
Use pre-shared.... = <sample passphrase>
New Network rule:
Source= Test
Firewall Policy:
SBS already contained a rule for all traffic from protected network to protected network.
In Dlink i have configured a new tunnel as dlink documentation.
Nord Ip = <pubblic static ip>
Sud Ip =
Tunnel is correctly established.
From vpn client ( that is connected behind the Dlink and use it as gateway i can access to all resource in the internal network.
Two question:
1) During test i view in ISA log an high number of connection between to that are denied. What are ths connection? Why are the only denied?
2) I have tried to merge to sbs domain the vpn client. Merging is ok, but after i have restart and i have tried to logon with user domain, logon access does not completed and vpn client hung in "load personal setting" windows. At this time in ISA log together normal traffic (DNS, authentication, etc...) allowed, i find an high number of connetction denied from port 0 to port 0 (how i have explained in my point 1). This the reasons of the failed access?
Thanks in advanced for any clarification.
Regards, Massimo

Post #: 1
RE: VPN. Port 0 denied. - 22.Jan.2007 2:52:15 AM   


Posts: 144
Joined: 20.May2006
From: Kingdom of Bahrain
Status: offline
Hi Massimo,

Could you please be more specific of your structure? I don't see any difficulties in setting up a VPN Gateway with ISA Server if the structure is correct.

P.S: Have you made your PAT "Port Address Translation" in your ADSL Modem to the External Interface of ISA Server?

Which VPN Protocol are you using? PPTP, L2TP, L2TP/IPSec ??



(in reply to xmaximox)
Post #: 2

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