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• write file in network shared folder with UnauthorizedAccessException?

  - by sam

  hi the win mobile 6 code tries to write files on network shared folder, but always gets UnauthorizedAccessException. I have checked permission and security setting on the folder and the code can read the file but just cant write to it. The code runs under administrator account which has full control over the folder and files. It is in vs 2008 professional with device emulator.Any help please? thanks very much.

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• How to programmatically execute the Network Setup Wizard and cofigure a lan connection with static

  - by Aakar

  Hi, I am creating an application that is connecting to another computer through an Ethernet cable in XP. I need to execute the network setup wizard to setup a local area connection (with File sharing Turned On) and then set static ips and the default gateway; all this programmatically using C#. How can this be achieved?

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• Open/browse a password protected mapped network drive

  - by Ravisha

  I just want open a mapped network drive from C# code ,it is apssword protected, so when i try to launch directly it gives exception. Can some one throw light on providing username password while opening the this drive

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• Event dispatched when network is disconnected while downloading files (URLs) for URLStream object

  - by Anahas

  I am creating an AIR application which downloads file from a server. I am using URLstream object with complete, progress, IOError, security error and HTTP status events. I am not getting an event if the network is disconnected when the download is in progress. Please can anyone tell me which event is dispatched? Thanks, Anahas

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• A good Java library for network math

  - by perilandmishap

  I'm looking for a Java library that is geared towards network math and already tested. Nothing particularly fancy, just something to hold ips and subnets, and do things like print a subnet mask or calculate whether an IP is within a given subnet. Should I roll my own, or is there already a robust library for this?

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• Secondary fallback/failover network on Cisco ASA

  - by tyranitar

  In my network there is a Cisco ASA 55x0 with "inside" interface (network 192.168.79.0/24) and "outside" interface (network 89.x.x.48/29) There is this nat rule: object network NAToutside nat (inside,outside) dynamic interface and the static route route outside 0.0.0.0 0.0.0.0 89.x.x.49 1 and all ACL rules. Now I have another new outside network by another ISP called "outside2", this network is already natted and the Cisco ASA in in the network 192.168.70.0/24. I would use this network as a fallback one. So I set the nat rule: object network NAToutside2 nat (inside,outside2) dynamic interface and the static route with a different metric route outside2 0.0.0.0 0.0.0.0 192.168.70.1 2 Clearly it doesn't work: when I disconnect the outside ethernet cable no workstation can connect to the Internet throught the outside2 network... What do I need more?

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• XAMPP Redirecting to XAMPP directory on Internal Network

  - by user302252

  I installed XAMPP on my desktop. I set up vhosts for about 5 sites and they are all working properly from the desktop itself. The problem arises whenever I try to access these vhosts from my laptop. I changed the hosts file on the laptop to redirect the laptop dev.domain.com requests to the desktop, however, when I try to access these sites from my laptop on the local network, I only receive the XAMPP welcome screen. It seems like when trying to access the vhosts on the desktop from the laptop the vhosts file is ignored as all requests are redirected to the xampp directory. What might I need to adjust to ensure access to the vhosts on the desktop from the laptop?

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• PHP: upload files to network shared folder

  - by Xi

  Hi there: I have a problem uploading file to a network shared folder. I can connect to the folder by using windows authentication in IE. The script is as followed: $target_path = '\\\\server\\images\\'; $target_path = $target_path . basename( $_FILES['uploadedfile']['name']); if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) { echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded"; } else{ echo "There was an error uploading the file, please try again!"; } when i ran it , I got an error message read: Warning: move_uploaded_file(\server\images\pic_firefox.jpg) [function.move-uploaded-file]: failed to open stream: Permission denied in C:\xxxxxxxxx\uploader.php on line 6 I thought that's because windows authentication doesn't work this way. Is there a way I can upload the file by using username/password? Any thoughts would be appreciated.

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• What's the best way to Notify network users of outages or maintenance

  - by Dubs

  There are times when one of our applications is down for maintenance and we'd like to let our users know about it before they start flooding our help desk with calls. What's the best way to notify our users of an event on the network? Some users are on our intranet, while others log in from the Web. Is there an application they can install to which we can send notifications messages? I'm interested to hear what others have come up with to address this requirement. Thanks!

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• Programatically check whether a drive letter is a shared/network drive

  - by Philip Daubmeier

  Hi SO community! I searched a while but found nothing that helped me. Is there a way to check whether a drive letter stands for a shared drive/network drive or a local disc in python? I guess there is some windows api function that gives me that info, but I cant find it. Perhaps there is even a method already integrated in python? What I am looking for is something with this or similar behaviour: someMagicMethod("C:\") #outputs True 'is a local drive' someMagicMethod("Z:\") #outputs False 'is a shared drive' That would help me as well: someMagicMethod2() #outputs list of shared drive letters Thanks a lot in advance!

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• Error while storing to a shared network drive when running website on IIS

  - by vini

  System.UnauthorizedAccessException: Access to the path '\\192.168.0.99\c$\DTA\DTA564348.64U20121217161754.dta' is denied. When i store the file by running on my local asp.net website it works fine and gets stored on the shared network drive However when i run this through IIS i get the above error C# Code StrPath = FilePhypath.ToString(); Web.Config <location allowOverride="true"> <appSettings> <add key="FilephyPath" value="\\192.168.0.99\c$\DTA\"/> </appSettings> </location>

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• Request time out error

  - by Neo

  Hi Today i came across strange problem whenever i try to pinging to my server works properly but whenever i send http request from browser the request time out happens. can anybody help me to resolve this issue.

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• SNMP Broadcast on Windows

  - by SNMP Dev

  I'm writing an SNMP agent in windows. The agent responds fine simple get and get-next request sent directly to computer's ip address. But when I do a SNMP broadcast, the computer receives the packet but does not anwer that. Why is that? The firewall is off and the antivirus too.

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• Apache HttpClient CoreConnectionPNames.CONNECTION_TIMEOUT does nothing ?

  - by Maxim Veksler

  Hi, I'm testing some result from HttpClient that looks irrational. It seems that setting CoreConnectionPNames.CONNECTION_TIMEOUT = 1 has no effect because send request to different host return successfully with connect timeout 1 which IMHO can't be the case (1ms to setup TCP handshake???) Am I misunderstood something or is something very strange going on here? The httpclient version I'm using as can be seen in this pom.xml is <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.0.1</version> <type>jar</type> </dependency> Here is the code: import java.io.IOException; import java.util.Random; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpUriRequest; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.params.CoreConnectionPNames; import org.apache.http.util.EntityUtils; import org.apache.log4j.Logger; public class TestNodeAliveness { private static Logger log = Logger.getLogger(TestNodeAliveness.class); public static boolean nodeBIT(String elasticIP) throws ClientProtocolException, IOException { try { HttpClient client = new DefaultHttpClient(); // The time it takes to open TCP connection. client.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 1); // Timeout when server does not send data. client.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 5000); // Some tuning that is not required for bit tests. client.getParams().setParameter(CoreConnectionPNames.STALE_CONNECTION_CHECK, false); client.getParams().setParameter(CoreConnectionPNames.TCP_NODELAY, true); HttpUriRequest request = new HttpGet("http://" + elasticIP); HttpResponse response = client.execute(request); HttpEntity entity = response.getEntity(); if(entity == null) { return false; } else { System.out.println(EntityUtils.toString(entity)); } // Close just in case. request.abort(); } catch (Throwable e) { log.warn("BIT Test failed for " + elasticIP); e.printStackTrace(); return false; } return true; } public static void main(String[] args) throws ClientProtocolException, IOException { nodeBIT("google.com?cant_cache_this=" + (new Random()).nextInt()); } } Thank you.

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• Inform me when site (server) is online again

  - by dede

  When I ping one site it returns "Request timed out". I want to make little program that will inform me (sound beep or something like that) when this server is online again. No matter in which language. I think it should be very simple script with a several lines of code. So how to write it?

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• Monitor network connectivity in WP7 apps

  - by Daniel Moth

  Most interesting Windows Phone apps rely on some network service for their functionality. So at some point in your app you may need to know programmatically if there is network connection available or not. For example, the Translator by Moth app relies on the Bing Translation service for translations. When a request for translation (text or voice) is made, the network call may fail. The failure reason is not evident from any of the return results, so I check the connection to see if it is present. Dependent on that, a different message is shown to the user. Before the translation phase is even reached, at the app start up time the Bing service is queried for its list of  languages; in that case I don't want to show the user a message and instead want to be notified when the network is available in order to send the query out again. So for those two requirements (which I imagine are common in other apps) I wrote a simple wrapper MyNetwork static class to the framework APIs: Call once MyNetwork.MonitorNetworkAvailability() method so it monitors the network change At any time check the MyNetwork.IsConnected property to check for network presence Subscribe to its MyNetwork.ConnectionEstablished event Optionally, during debugging use its MyNetwork.ChangeStatus method to simulate a change in network status As usual, there may be better ways to achieve this, but this class works perfectly for my scenarios. You can download the code here: MyNetworks.cs. Comments about this post welcome at the original blog.

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• Search network device from LAN through my C++ application and change the IP address

  - by Arun Kumar K S

  I am developing an application in C++ to communicate with my network device. I used UDP classes to search the device from the network. I done the code in such a way that from my application a broadcast message will send to the local network. The device will respond to the broadcast message and the application will get the IP address from that response. After establishing a network communication send a message to the device for changing the IP address. That worked fine if my devices IP address is correct. But when I set a wrong IP address and subnet to the device. My application will never get any messages from the device. So I can't able communicate to the device and not able get the device and unable to change the IP address etc. Say example IP address of the device 20.1.1.1 Subnet Mask 255.0.0.0 And in my system that runs the application IP address 192.168.1.23 Subnet Mask 255.255.255.0 I tried the Lantronix device installation software with their Lantronix device in network. It listed the device from the network and I am able to change the IP address from their software. Any one know how this is done in this type of software? How I can search in network to find the device and change the IP address when its IP address is not in range? Which protocol they used to find the device?

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• C# Detect Localhost Port Usage

  - by ThaKidd

  In advance, thank you for your advice. I am currently working on a program which uses Putty to create a SSH connection with a server that uses local port forwarding to enable a client, running my software, to access the service behind the SSH server via localhost. IE: client:20100 - Internet - Remote SSH server exposed via router/firewall - Local Intranet - Intranet Web POP3 Server:110. Cmd Line: "putty -ssh -2 -P 22 -C -L 20100:intranteIP:110 -pw sshpassword sshusername@sshserver" Client would use putty to create a SSH connection with the SSH server specifying in the connection string that it would like to tie port 110 of the Intranet POP3 Server to port 20100 on the client system. Therefore the client would be able to open up a mail client to localhost:20100 and interact with the Internal POP3 server over the SSH tunnel. The above is a general description. I already know what I am trying to do will work without a problem so am not looking for debate on the above. The question is this...How can I ensure the local port (I cannot use dynamic ports, so it must be static) on localhost is not being used or listened to by any other application? I am currently executing this code in my C# app: private bool checkPort(int port) { try { //Create a socket on the current IPv4 address Socket TestSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); // Create an IP end point IPEndPoint localIP = new IPEndPoint(IPAddress.Parse("127.0.0.1"), port); // Bind that port TestSocket.Bind(localIP); // Cleanup TestSocket.Close(); return false; } catch (Exception e) { // Exception occurred. Port is already bound. return true; } } I am currently calling this function starting with a specific port in a for loop to get the 'false' return at the first available port. The first port I try is actually being listened to by uTorrent. The above code does not catch this and my connection fails. What is the best method to ensure a port is truly free? I do understand some other program may grab the port during/after I have tested it. I just need to find something that will ensure it is not currently in use AT ALL when the test is executed. If there is a way to truly reserve the localhost port during the test, I would love to hear about it.

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• How to migrate existing udp application to raw sockets

  - by osgx

  Hello Is there a tutorial for migration from plain udp sockets (linux, C99/C++, recv syscall is used) to the raw sockets? According to http://aschauf.landshut.org/fh/linux/udp_vs_raw/ch03s04.html raw socket is much faster than udp. Application is client-server. client is proprietary and must use exactly same procotol as it was with udp server. But server can be a bit faster with raw sockets. What parts of udp I must to implement in server? Is there a "quick migration" libraries?

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• Do the Nagle Algorith and Delayed ACK's affect TCP Connection Setup?

  - by Robert S. Barnes

  Do the client's SYN and the servers SYN+ACK get delayed by Nagle? Will the client's ACK of the server's SYN get delayed? Will connect return after rtt+spt or will it take rtt + spt + 2x Nagle Delay? Or more generally, how do the Nagle Algorith and Delayed ACK's affect TCP Connection Setup?

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• Books for transport layer protocol implementation in Computer Networks

  - by bala1486

  Hello. I am trying to implement a transport layer protocol for my project. I am going to use Linux as my operating system. Could you please suggest me some books or links that explain the implementation of transport layer (like TCP)? Thank you.. Thanks, Bala

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• check if remote host is up in python

  - by ed1t

  How would I check if the remote host is up without having a port number? Is there any other way I could check other then using regular ping. There is a possibility that the remote host might drop ping packets

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• Routing algorithm

  - by isaac

  Hello, I'm giving a presentation about computer routing and I want to make a good analogy with a real-world situation. However, I could not find it. Do you have in mind any of the situations like the computer routing. If yes, could you please provide me with it

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• Python: How to transfer varrying length arrays over a network connection

  - by Devin

  Hi, I need to transfer an array of varying length in which each element is a tuple of two integers. As an example: path = [(1,1),(1,2)] path = [(1,1),(1,2),(2,2)] I am trying to use pack and unpack, however, since the array is of varying length I don't know how to create a format such that both know the format. I was trying to turn it into a single string with delimiters, such as: msg = 1&1~1&2~ sendMsg = pack("s",msg) or sendMsg = pack("s",str(msg)) on the receiving side: path = unpack("s",msg) but that just prints 1 in this case. I was also trying to send 4 integers as well, which send and receive fine, so long as I don't include the extra string representing the path. sendMsg = pack("hhhh",p.direction[0],p.direction[1],p.id,p.health) on the receive side: x,y,id,health = unpack("hhhh",msg) The first was for illustration as I was trying to send the format "hhhhs", but either way the path doesn't come through properly. Thank-you for your help. I will also be looking at sending a 2D array of ints, but I can't seem to figure out how to send these more 'complex' structures across the network. Thank-you for your help.

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• How can I share the TV card on my home network? with a solution like `ln -s`?

  - by Boris

  My environment: - 2 PCs, a desktop and a laptop, both on Oneiric - they are connected together by ethernet wire - nfs-common is installed and configured: the desktop is the server - a TV tuner card is installed on the desktop, I can watch the French TNT TV with the software Me-TV It works fine, TV on desktop, and my network too: I share folders thanks to NFS. But I would like more: how can I share my TV tuner card from the desktop and be able to watch TV on the laptop too? If possible I would like a solution that allows me to keep using the software Me-TV, on both PCs. I bet that there is a solution to create a fake TV card on the 2nd PC. Something like ln -s on /dev/dvb/adapter0/.

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