Virtual Network Computing (VNC) is a platform-independent graphical desktop sharing
system which uses the RFB protocol to allow you remotely view and fully interact with
one computer desktop (the “VNC server”) using the VNC viewer on another computer
from anywhere over a network. …
Download from here: > VNC_Server_manual_Client_3.0 / Click Me
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# iptables -A INPUT -s IP-ADDRESS -j DROP # iptables -A INPUT -s 65.55.44.100 -j DROP # iptables -A INPUT -s 65.55.44.100 -p tcp --destination-port 25 -j DROP |
CentOS / RHEL / Fedora Block An IP And Save It To Config File
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# iptables -A INPUT -s 65.55.44.100 -j DROP # service iptables save |
How Do I Unblock An IP Address?
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# iptables -D INPUT -s xx.xxx.xx.xx -j DROP # iptables -D INPUT -s 65.55.44.100 -j DROP # service iptables save |
Download – KEPServerEX OPC Communications Server
KEPServerEX is a flexible and scalable solution for connecting, managing, monitoring, and controlling diverse automation devices and software applications. Communications is managed through a robust platform that supports an array of open standards such as OPC, propriety communication protocols, APIs, and various automation systems’ interfaces. KEPServerEX enables improved operations and decision making throughout all levels of an organization.
Search in google for DLL files
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items[0] = new Opc.Da.Item(); items[0].ItemName = "kutay zorlu"; |
2. Dll Usings
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using Opc.Da; using Server=Opc.Da.Server; using Factory=OpcCom.Factory; string urlstring = string.Format("opcda://{0}/{1}/{{{2}}}", _hostName, _serverName, serverid); Server s = new Server(new Factory(), new URL(urlstring)); ItemIdentifier itemId = null; BrowsePosition position; BrowseFilters filters = new BrowseFilters() {BrowseFilter = browseFilter.item}; BrowseElement[] elements = s.Browse(itemId, filters, out position); |
VB EXamples
Public Function Browse(ByRef node As TreeNode, Optional id As Opc.ItemIdentifier = Nothing) As Integer
Try this to for solution
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Dim clone As Opc.Da.Server = your_connected_server Dim filters As New Opc.Da.BrowseFilters filters.BrowseFilter = Opc.Da.browseFilter.all Dim pos As Opc.Da.BrowsePosition = Nothing Dim elements() As Opc.Da.BrowseElement = clone.Browse(id, filters, pos) If (elements IsNot Nothing) Then For Each element As Opc.Da.BrowseElement In elements Console.WriteLine(element.ItemName) AddBrowseElement(node, element) If (element.HasChildren = True) Then id = New Opc.ItemIdentifier(element.ItemPath, element.ItemName) Browse(node.Nodes.Item(node.Nodes.Count - 1), id) End If Next End If Return 0 Catch ex As Exception RaiseEvent OnException(GetCurrentMethod, ex) Return -1 End Try End Function Private Sub AddBrowseElement(ByRef parent As TreeNode, element As Opc.Da.BrowseElement) Dim node As TreeNode = New TreeNode(element.Name) node.Text = element.Name node.Tag = element ' add properties If (element.Properties IsNot Nothing) Then For Each [property] As Opc.Da.ItemProperty In element.Properties AddItemProperty(node, [property]) Next End If ' add to parent. parent.Nodes.Add(node) End Sub |
What is OPC? Part 1: OPC Overview
What is OPC? Part 2: OPC Case Study
What is OPC? Part 3: OPC Specifications
What is OPC? Part 4: OPC Compliance
Introduction to OPC for Factory Automation and Plant Process Control
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public bool Ping() { Ping p = new Ping(); try { PingReply reply = p.Send("www.kutayzorlu.com", 1000); if (reply.Status == IPStatus.Success) return true; } catch(Exception ex) { MessageBox.Show(ex.Message.ToString()); } return false; } private void start_Click(object sender, EventArgs e) { for (; ; ) // unl[/csharp]ess { Console.WriteLine(Ping); } } |
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public class NetworkStateMonitor { private System.Threading.Timer _timer; bool _wasConnected = false; public NetworkStateMonitor() { _timer = new System.Threading.Timer(OnPing, null, TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(10)); } public bool CheckInternetConnection() { bool result = false; Ping p = new Ping(); try { PingReply reply = p.Send("www.kutayzorlu.com", 1000); if (reply.Status == IPStatus.Success) return true; catch (PingException) { return false; } } private void OnPing(object state) { var newState = CheckInternetConnection(); if (!newState && _wasConnected) ConnectionLost(this, EventArgs.Empty); else if (newState && !_wasConnected) Connected(this, EventArgs.Empty); _wasConnected = newState; } public event EventHandler ConnectionLost = delegate{}; ******* public event EventHandler Connected = delegate{}; ****** } |