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ISA 2004 Denied VPN connection

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ISA 2004 Denied VPN connection - 23.Jun.2006 12:51:01 PM   
sawahab1

 

Posts: 3
Joined: 15.Dec.2005
Status: offline
hi

ive configure vpn on isa 2004 using pptp when client connect to vpn  isa server denied the connection

ISA 2004 wSP2
The user account being used to log-in via VPN is my Administrative Account
and has been granted Dial in Access
A VPN rule has been created
VPN Client Access is enabled
PPTP is enabled
Access Networks is All Networks and Local Host
static IP network
isp allow pptp

sawahab
Post #: 1
RE: ISA 2004 Denied VPN connection - 24.Jun.2006 7:12:57 AM   
Zac

 

Posts: 44
Joined: 6.Oct.2005
From: Kuwait
Status: offline
Hi,

First of all make sure that the VPN service is running on ISA by checking Monitoring-Services. Look for any errors in the event viewer. It will give more details of the problem. Make sure that you created rules for VPN connections. How the cleints are getting the IP? through DHCP or Static? Post the details.


Regards,

Zac.

(in reply to sawahab1)
Post #: 2
RE: ISA 2004 Denied VPN connection - 26.Jun.2006 12:12:53 PM   
sawahab1

 

Posts: 3
Joined: 15.Dec.2005
Status: offline
Hi Zac

thx for reply
VPN service is running, VPN rules is created, and clients getting IP through Static.
local ip rang is 192.168.0.1 to 192.168.0.219
VPN address assignment method is static and pool is 192.168.0.220 to 255
Event Viewer shown following 2 errors
 
Event Source: Microsoft Firewall
Event ID: 14147
User:  N/A
Computer: MSERVER
Description:
ISA Server detected routes through adapter Local Area Connection 2 that do not correlate with the network element to which this adapter belongs. For best practice, the address range of an ISA Server network should match the address ranges routable through the associated network adapter as defined in the routing table. Otherwise valid packets may be dropped as spoofed. (This alert may occur momentarily when you create a remote site network. You may safely ignore this message if it does not reoccur.)  The address ranges in conflict are: 192.168.0.0-192.168.0.0;.

 
and
 
Event Source: Microsoft ISA Server Control
Event ID: 11005
User:  N/A
Computer: MSERVER
Description:
Microsoft ISA Server Control encountered a failure. The failure occurred during Reading of VPN configuration because the system call MprAdminServerSetCredentials failed. Use the source location 121.2980.4.0.2165.594 to report the failure. The error description is: The binding handle is invalid.

 
sawahab

(in reply to Zac)
Post #: 3
RE: ISA 2004 Denied VPN connection - 5.Jul.2006 5:57:08 PM   
davidlee799

 

Posts: 1
Joined: 16.Jun.2004
Status: offline
Based on my research, this issue could be caused by the service dependency
or server configuration. For example, if the IPSec service on the server
was not started, the problem could occur.

Here, please open Services.msc console. Check the status of IPSec service.
Make sure that the service is running. Try to reboot the ISA server to see
if the problem will be resolved.

(in reply to sawahab1)
Post #: 4
RE: ISA 2004 Denied VPN connection - 7.Jul.2006 2:27:14 PM   
sawahab1

 

Posts: 3
Joined: 15.Dec.2005
Status: offline
IPSec service was disable but after starting the service problem not solve.

ISA log show the following

1723    PPTP                           Initiated Connection      0x0
2610    Unidentified IP Traffic   Denied Connection       0xc0040034       FWX_E_SEQ_ACK_MISMATCH
2610    Unidentified IP Traffic   Denied Connection       0xc0040034       FWX_E_SEQ_ACK_MISMATCH

(in reply to davidlee799)
Post #: 5

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