Can't connect to vpn server

I am now setting up the vpn server using mac mini with Mac OSX v 10.7 Lion Server. After setting up, I found that I can't make connection.
When I check out the console, I find that the vpnd continue assign IP address to the same client and then hungup as follows:
Is there any solution?
11/17/11 2:31:56.180 PM racoon: IKE Packet: receive success. (Responder, Main-Mode message 1).
11/17/11 2:31:56.181 PM racoon: IKE Packet: transmit success. (Responder, Main-Mode message 2).
11/17/11 2:31:56.206 PM racoon: IKE Packet: receive success. (Responder, Main-Mode message 3).
11/17/11 2:31:56.225 PM racoon: IKE Packet: transmit success. (Responder, Main-Mode message 4).
11/17/11 2:31:56.241 PM racoon: IKEv1 Phase1 AUTH: success. (Responder, Main-Mode Message 5).
11/17/11 2:31:56.241 PM racoon: IKE Packet: receive success. (Responder, Main-Mode message 5).
11/17/11 2:31:56.241 PM racoon: IKEv1 Phase1 Responder: success. (Responder, Main-Mode).
11/17/11 2:31:56.241 PM racoon: IKE Packet: transmit success. (Responder, Main-Mode message 6).
11/17/11 2:31:56.241 PM racoon: IPSec Phase1 established (Initiated by peer).
11/17/11 2:31:57.098 PM racoon: IPSec Phase2 started (Initiated by me).
11/17/11 2:31:57.098 PM racoon: IKE Packet: transmit success. (Initiator, Quick-Mode message 1).
11/17/11 2:31:57.102 PM racoon: IPSec Phase2 started (Initiated by peer).
11/17/11 2:31:57.102 PM racoon: IKE Packet: receive success. (Responder, Quick-Mode message 1).
11/17/11 2:31:57.102 PM racoon: IKE Packet: transmit success. (Responder, Quick-Mode message 2).
11/17/11 2:31:57.104 PM racoon: IKE Packet: receive success. (Responder, Quick-Mode message 3).
11/17/11 2:31:57.105 PM racoon: IKEv1 Phase2 Responder: success. (Responder, Quick-Mode).
11/17/11 2:31:57.105 PM racoon: IPSec Phase2 established (Initiated by peer).
11/17/11 2:31:57.157 PM vpnd: Incoming call... Address given to client = 137.189.141.137
11/17/11 2:31:57.157 PM com.apple.ppp.l2tp: 2011-11-17 14:31:57 CST Incoming call... Address given to client = 137.189.141.137
11/17/11 2:31:57.180 PM pppd: pppd 2.4.2 (Apple version 560.13) started by root, uid 0
11/17/11 2:31:57.181 PM pppd: L2TP incoming call in progress from '137.189.141.146'...
11/17/11 2:31:58.156 PM vpnd: Incoming call... Address given to client = 137.189.141.138
11/17/11 2:31:58.156 PM com.apple.ppp.l2tp: 2011-11-17 14:31:58 CST Incoming call... Address given to client = 137.189.141.138
11/17/11 2:31:58.177 PM pppd: pppd 2.4.2 (Apple version 560.13) started by root, uid 0
11/17/11 2:31:58.179 PM pppd: L2TP incoming call in progress from '137.189.141.146'...
11/17/11 2:31:59.156 PM vpnd: Incoming call... Address given to client = 137.189.141.139
11/17/11 2:31:59.156 PM com.apple.ppp.l2tp: 2011-11-17 14:31:59 CST Incoming call... Address given to client = 137.189.141.139
11/17/11 2:31:59.178 PM pppd: pppd 2.4.2 (Apple version 560.13) started by root, uid 0
11/17/11 2:31:59.179 PM pppd: L2TP incoming call in progress from '137.189.141.146'...
11/17/11 2:32:00.100 PM racoon: IKE Packet: transmit success. (Phase2 Retransmit).
11/17/11 2:32:00.157 PM vpnd: Incoming call... Address given to client = 137.189.141.140
11/17/11 2:32:00.157 PM com.apple.ppp.l2tp: 2011-11-17 14:32:00 CST Incoming call... Address given to client = 137.189.141.140
11/17/11 2:32:00.178 PM pppd: pppd 2.4.2 (Apple version 560.13) started by root, uid 0
11/17/11 2:32:00.180 PM pppd: L2TP incoming call in progress from '137.189.141.146'...
11/17/11 2:32:02.102 PM racoon: IKE Packet: transmit success. (Phase1 Retransmit).
11/17/11 2:32:03.103 PM racoon: IKE Packet: transmit success. (Phase2 Retransmit).
11/17/11 2:32:06.107 PM racoon: IKE Packet: transmit success. (Phase2 Retransmit).
11/17/11 2:32:09.110 PM racoon: IKEv1 Phase2: maximum retransmits. (Phase2 maximum retransmits).
11/17/11 2:32:12.114 PM racoon: IKE Packet: transmit success. (Phase1 Retransmit).
11/17/11 2:32:17.191 PM vpnd: --> Client with address = 137.189.141.137 has hungup
11/17/11 2:32:17.191 PM com.apple.ppp.l2tp: 2011-11-17 14:32:17 CST --> Client with address = 137.189.141.137 has hungup
11/17/11 2:32:18.163 PM vpnd: Incoming call... Address given to client = 137.189.141.137
11/17/11 2:32:18.163 PM com.apple.ppp.l2tp: 2011-11-17 14:32:18 CST Incoming call... Address given to client = 137.189.141.137
11/17/11 2:32:18.180 PM pppd: pppd 2.4.2 (Apple version 560.13) started by root, uid 0
11/17/11 2:32:18.184 PM pppd: L2TP incoming call in progress from '137.189.141.146'...
11/17/11 2:32:18.186 PM vpnd: --> Client with address = 137.189.141.138 has hungup
11/17/11 2:32:18.186 PM com.apple.ppp.l2tp: 2011-11-17 14:32:18 CST --> Client with address = 137.189.141.138 has hungup
11/17/11 2:32:19.163 PM vpnd: Incoming call... Address given to client = 137.189.141.138
11/17/11 2:32:19.163 PM com.apple.ppp.l2tp: 2011-11-17 14:32:19 CST Incoming call... Address given to client = 137.189.141.138
11/17/11 2:32:19.180 PM pppd: pppd 2.4.2 (Apple version 560.13) started by root, uid 0
11/17/11 2:32:19.184 PM pppd: L2TP incoming call in progress from '137.189.141.146'...
11/17/11 2:32:19.186 PM vpnd: --> Client with address = 137.189.141.139 has hungup
11/17/11 2:32:19.186 PM com.apple.ppp.l2tp: 2011-11-17 14:32:19 CST --> Client with address = 137.189.141.139 has hungup
11/17/11 2:32:20.164 PM com.apple.ppp.l2tp: 2011-11-17 14:32:20 CST Incoming call... Address given to client = 137.189.141.139
11/17/11 2:32:20.164 PM vpnd: Incoming call... Address given to client = 137.189.141.139
11/17/11 2:32:20.187 PM pppd: pppd 2.4.2 (Apple version 560.13) started by root, uid 0
11/17/11 2:32:20.188 PM vpnd: --> Client with address = 137.189.141.140 has hungup
11/17/11 2:32:20.188 PM com.apple.ppp.l2tp: 2011-11-17 14:32:20 CST --> Client with address = 137.189.141.140 has hungup
11/17/11 2:32:20.189 PM pppd: L2TP incoming call in progress from '137.189.141.146'...
11/17/11 2:32:21.164 PM vpnd: Incoming call... Address given to client = 137.189.141.140
11/17/11 2:32:21.164 PM com.apple.ppp.l2tp: 2011-11-17 14:32:21 CST Incoming call... Address given to client = 137.189.141.140
11/17/11 2:32:21.185 PM pppd: pppd 2.4.2 (Apple version 560.13) started by root, uid 0
11/17/11 2:32:21.187 PM pppd: L2TP incoming call in progress from '137.189.141.146'...
11/17/11 2:32:29.130 PM racoon: IKE Packet: transmit success. (Phase1 Retransmit).
11/17/11 2:32:38.192 PM vpnd: --> Client with address = 137.189.141.137 has hungup
11/17/11 2:32:38.192 PM com.apple.ppp.l2tp: 2011-11-17 14:32:38 CST --> Client with address = 137.189.141.137 has hungup
11/17/11 2:32:39.141 PM racoon: IKE Packet: transmit success. (Phase1 Retransmit).
11/17/11 2:32:39.172 PM vpnd: Incoming call... Address given to client = 137.189.141.137
11/17/11 2:32:39.172 PM com.apple.ppp.l2tp: 2011-11-17 14:32:39 CST Incoming call... Address given to client = 137.189.141.137
11/17/11 2:32:39.189 PM vpnd: --> Client with address = 137.189.141.138 has hungup
11/17/11 2:32:39.189 PM com.apple.ppp.l2tp: 2011-11-17 14:32:39 CST --> Client with address = 137.189.141.138 has hungup
11/17/11 2:32:39.191 PM pppd: pppd 2.4.2 (Apple version 560.13) started by root, uid 0
11/17/11 2:32:39.192 PM pppd: L2TP incoming call in progress from '137.189.141.146'...
11/17/11 2:32:40.172 PM vpnd: Incoming call... Address given to client = 137.189.141.138
11/17/11 2:32:40.172 PM com.apple.ppp.l2tp: 2011-11-17 14:32:40 CST Incoming call... Address given to client = 137.189.141.138
11/17/11 2:32:40.194 PM pppd: pppd 2.4.2 (Apple version 560.13) started by root, uid 0
11/17/11 2:32:40.197 PM pppd: L2TP incoming call in progress from '137.189.141.146'...
11/17/11 2:32:40.198 PM vpnd: --> Client with address = 137.189.141.139 has hungup
11/17/11 2:32:40.198 PM com.apple.ppp.l2tp: 2011-11-17 14:32:40 CST --> Client with address = 137.189.141.139 has hungup
11/17/11 2:32:41.173 PM vpnd: Incoming call... Address given to client = 137.189.141.139
11/17/11 2:32:41.173 PM com.apple.ppp.l2tp: 2011-11-17 14:32:41 CST Incoming call... Address given to client = 137.189.141.139
11/17/11 2:32:41.191 PM vpnd: --> Client with address = 137.189.141.140 has hungup

I have no new information to report to help you with this, but I am also seeing the same issue. The same behavior happens when connecting through my router *or* via ATT iPhone tethering.

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System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden
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   --- End of inner exception stack trace ---
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   --- End of inner exception stack trace ---
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--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
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--- End of stack trace from previous location where exception was thrown ---
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--- End of stack trace from previous location where exception was thrown ---
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--- End of stack trace from previous location where exception was thrown ---
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An error occurred while sending the request.
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System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden
by its access permissions 192.168.89.25:80
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   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<SendHttpRequest>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<SendRequest>d__d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<TryNextUrl>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<StartDiscoveryJourney>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at LyncConnectivityAnalyzerCore.Utilities.<RetrieveUserLocation>d__3e.MoveNext()
Server discovery failed for unsecured internal channel against
http://lyncdiscoverinternal.xxx.com/
Starting automatic discovery for secure (HTTPS) external channel
Sending HTTP request to
https://lyncdiscover.xxx.com/[email protected]
Exception encountered while sending an HTTP request to
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to the remote server ---> System.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden by its access permissions 192.168.89.25:443
   at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<SendHttpRequest>d__9.MoveNext()
An error occurred while sending the request.
Unable to connect to the remote server
An attempt was made to access a socket in a way forbidden by its access permissions 192.168.89.25:443
For troubleshooting, try using a browser to open the server discovery URL
https://lyncdiscover.xxx.com/[email protected]
System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden
by its access permissions 192.168.89.25:443
   at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<SendHttpRequest>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<SendRequest>d__d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<TryNextUrl>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<StartDiscoveryJourney>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at LyncConnectivityAnalyzerCore.Utilities.<RetrieveUserLocation>d__3e.MoveNext()
Server discovery failed for secured external channel against
https://lyncdiscover.xxx.com/
Starting automatic discovery for unsecure (HTTP) external channel
Sending HTTP request to
http://lyncdiscover.xxx.com/[email protected]
Exception encountered while sending an HTTP request to
http://lyncdiscover.xxx.com/[email protected]: An error occurred while sending the request.. Complete Exception: \r\nSystem.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect
to the remote server ---> System.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden by its access permissions 192.168.89.25:80
   at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<SendHttpRequest>d__9.MoveNext()
An error occurred while sending the request.
Unable to connect to the remote server
An attempt was made to access a socket in a way forbidden by its access permissions 192.168.89.25:80
For troubleshooting, try using a browser to open the server discovery URL
http://lyncdiscover.xxx.com/[email protected]
System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden
by its access permissions 192.168.89.25:80
   at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<SendHttpRequest>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<SendRequest>d__d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<TryNextUrl>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.LyncServer.WebServices.AutoDiscoverManager.<StartDiscoveryJourney>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at LyncConnectivityAnalyzerCore.Utilities.<RetrieveUserLocation>d__3e.MoveNext()
Server discovery failed for unsecured external channel against
http://lyncdiscover.xxx.com/
None, AutoInternalSecureD, AutoInternalUnsecureD, AutoExternalSecureD, AutoExternalUnsecureD, ManualDNSFail, ManualSecureD, ManualUnsecureD, AuthBrokerInternalLMXCheckGET, AuthBrokerInternalLMXCheckPOST, AuthBrokerExternalLMXCheckGET, AuthBrokerExternalLMXCheckPOST,
MobilityMCXInternalLMXCheckGET, MobilityMCXInternalLMXCheckPOST, MobilityMCXExternalLMXCheckGET, MobilityMCXExternalLMXCheckPOST, LMXSIPServerInternalDNS, LMXSIPServerExternalDNS, MobilityUCWAInternalCheckPOST, MobilityUCWAExternalCheckPOST
Automatic discovery of the Lync server failed. Please verify the server requirements at
http://go.microsoft.com/fwlink/?LinkId=278998 . Lync mobile apps do not require automatic discovery. You could enter the server FQDN manually and test connectivity again.
Microsoft Lync Connectivity Analyzer cannot analyze deployment readiness until a discovery test has completed successfully.

Hi
Is that Port 443 opened? check the fire wall.
is that external Lync clients are logging in with out any issues.
by seeing the Log it is unable to connect on port 443
Unable to connect to the remote server ---> System.Net.Sockets.SocketException: An attempt was made
to access a socket in a way forbidden by its access permissions 192.168.89.25:443
For troubleshooting the Mobility issues follows this
http://blogs.technet.com/b/nexthop/archive/2012/02/21/troubleshooting-external-lync-mobility-connectivity-issues-step-by-step.aspx
Whenever you see a helpful reply, click on Vote As Helpful & click on Mark As Answer if a post answers your question.

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http://support.apple.com/kb/PH11212?viewlocale=en_US
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