[SecurityException: Request for the permission of type 'System.Net.SocketPermission, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]
System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) +0
System.Security.CodeAccessSecurityEngine.Check(CodeAccessPermission cap, StackCrawlMark& stackMark) +36
System.Security.CodeAccessPermission.Demand() +48
System.Net.Sockets.Socket.Bind(EndPoint localEP) +219
System.Net.Sockets.TcpListener.Start(Int32 backlog) +156
System.Net.Sockets.TcpListener.Start() +15
Default2.Page_Load(Object sender, EventArgs e) in g:\pleskvhosts\onxcontrol.com\httpdocs\modbus_tcp.aspx.cs:41
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
System.Web.UI.Control.OnLoad(EventArgs e) +97
System.Web.UI.Control.LoadRecursive() +61
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6796
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +250
System.Web.UI.Page.ProcessRequest() +76
System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +24
System.Web.UI.Page.ProcessRequest(HttpContext context) +62
ASP.modbus_tcp_aspx.ProcessRequest(HttpContext context) in App_Web_ywuawsnk.0.cs:0
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +195
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +50
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +73
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