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• List of IP addresses/hostnames from local network in Python

  - by joshhunt

  How can I get a list of the IP addresses or host names from a local network easily in Python? It would be best if it was multi-platform, but it needs to work on Mac OS X first, then others follow. Edit: By local I mean all active addresses within a local network, such as 192.168.xxx.xxx. So, if the IP address of my computer (within the local network) is 192.168.1.1, and I have three other connected computers, I would want it to return the IP addresses 192.168.1.2, 192.168.1.3, 192.168.1.4, and possibly their hostnames.

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• Detecting network adapter changes on the iPhone

  - by theactiveactor

  Say that there are no WIFI networks currently available and my network-enabled app is connected over 3G. How can I detect if a user has roamed into a WIFI network? I would also like to detect the case when the user is connected over WIFI and suddenly received 3G signal. In other words, I would like to be asynchronously notified of network adapter changes. I tried using the SCNetworkReachability framework asynchronously but found that for some reason, I am not receiving Wifi-related events (i.e. adapter on/off) when connected over 3G.

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• Reading a file over a network path

  - by Sin5k4

  I have this weird issue,when I use > File FileToRead = new File("\\\\MYSERVER\\MYFOLDER\\MYFOLDER\\MYPICTURE.JPG"); to read a file over a network,all I get is a null pointer exception.Normally a local path works with this,but when on a network path,I just couldn't manage to get it to work.Any ideas? PS:oh and my network connection seems to work,no issues when accessing data in windows explorer... More of the code: File FileToRead = new File("file://DOKSERVICE/Somefolder/ProductImage/01001.JPG"); // File FileToRead = new File("c:\\dog.jpg"); local test BufferedImage image = ImageIO.read(FileToRead); BufferedImage resizedimage = new BufferedImage(260, 260,BufferedImage.TYPE_INT_RGB ); Graphics2D g = resizedimage.createGraphics(); g.drawImage(image, 0, 0, 260, 260, null); g.dispose(); picture.setIcon(new ImageIcon(image));

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• Setting up a wireless network with Verizon MiFi

  - by winarm

  I am trying to set up a home network. I live in a location without cable internet so I have a Verizon MiFi card. I have a few laptops at the moment and they each connect through the card but I want to set up an Ubuntu 10.10 server and see if I can use it for DHCP. I have a Trendnet TEG-S50G switch and the computer I plan to use for the server has a Linksys WMP-11 Wireless PCI card. Is there any other equipment I need in order to get this to work? Is this even doable? Is there a better way to make this happen?

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• SNMP based network discovery (switches), device (ports on switches) power management

  - by SaM

  In a enterprise network, what would be the right way to generate a list of switches (SNMP managed) Is it reasonable to ask the organization to supply a list such as this: Switch name IP Address of switch Location SNMP community strings Or are there standard ways to run discovery scans - UDP broadcasts? After having generated a repository such as the above; given a single switch, how to query it for the list of all devices attached to it? Finally, how to selectively power down/power up ports? (remotely - using SNMP) Platform is going to be .NET based (C#) and the library being used is SharpSNMP

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• Trouble with cross network permissions for an image through iis7 in an asp.net virtual directory

  - by EdenMachine

  I have load balanced web servers My web application has a function that allows the user to upload their company logo to display in the application header obviously, when they upload the logo image file, it needs to be in a central location or otherwise, the file will not be accessible to the other server on the load balancer. in order to be able to upload the image through the application other on one of either servers and then display it on both servers I need a virtual directory in IIS on both servers that point to a third "file server" (this is the "AcctData" directory shown below with a sub folder "images") the problem is that no matter what I do, I run into a permissioning issue If I use pass-through authentication I get a 401 error. If I use a specific user that's set up on both boxes, I get a 500 error. The "Default" application under "CP" (shown in the image below) uses an AppPool that is a Domain Account that has admin permissions on all the servers. I've also tried sticking a Web.config file in the "AcctData" directory allowing anonymous access. Nothing is working though.

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• Instant messanger capable of offline messaging & tolerant of network interruptions

  - by Terry

  I am looking for an instant messaging solution to facilitate communications between recovery vehicles in remote rural areas. All the vehicles have internet connections, but they are intermittent depending on location. Ideally we'd like something that has the following features: Offline messaging: messages sent to clients who are offline will be delivered when they next come online, regardless of whether the sender is still online or not. Lightweight: CPU cycles are limited on the machines in these vehicles. A bloated solution will be an issue. Client platform is primarily win32, but support for osx/linux/mobile devices would be a bonus. Non-chatty: Bandwidth is a precious commodity for us, so services which use a minimal amount are ideal. Fault tolerant: We see plenty of packetloss and high latency, so whatever we use needs to be able to function in trying network conditions. I'm not fussed if we use a hosted platform like gtalk/skype/msn/icq/whatever, and likewise I can run a server if need be. Suggestions would be appreciated!

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• Connecting/Adding a private network on windows server 2008

  - by WhyMe

  Hey all, I have a dual server configuration on a host provider using VPS. I was told by my Host provider that in order to use free bandwidth between my two servers (they are in the same location) I need to add a alias "subnet" to a specific ip (A private network, VPN). How do I add an aliased ip in widnwos? in Linux the relevant command is supposed to be (By my search in blogs) "ifconfig eth0:1 10.129.175.165 netmask 255.255.255.0" They also said that another way to connect between the servers (should also be faster) is to use "private lan", but as it happens I don't know how to define one :(. Is there a windows equivalent or another way to do this? I have checked my ip config and found no indication of the private lan or the VPN ip.

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• Home Network Photo Server

  - by CMP

  I am looking for a photo solution for our home network. We have several computers, running windows and OS X. I would like to store all of our photos in a central location, and have them be accessible from any machine. Most of our photos are currently in an iPhoto library, and ideally there would still be a way to import photos from the server to iPhoto easily. This can run really on any operating system, but it must be easily accessible for anybody. A gallery type view would be good, but also must allow direct file access and transfers. Anybody have a solution that works for them, or any ideas of what I could do?

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• network routing between mac & virtual XP

  - by Kevin

  Hi - I have a max laptop running XP inside VirtualBox. The network is setup to be a "Bridged Adapter" so that the IPs for both the host & guest OS's are assigned by my wireless routed. My guest XP has Nortel VPN connecting to corporate lan. When this is connected, I want to allow my host Mac OS to access the corporate network. But I'm struggling. Without Nortel VPN running, I can change routing on the mac so all traffic is sent via the guest XP - this works. But once I activate the VPN, this no longer works. If I try to change the routing on mac to run through the IP address assigned to the Nortel adapter, I get a "Network is unreachable" error. Below is the output from ipconfig /all on the guest XP OS. I'm beginning to believe that what I want to do is not possible because of the way Nortel secure the VPN - but before I give up I thought I'd post the problem here. Thanks, Kevin z:\eclipseworkspace\RESMobileSuite\trunk>ipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : zzzz-3177b42dd0 Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Unknown IP Routing Enabled. . . . . . . . : Yes WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : zzzz.zzz Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : AMD PCNET Family PCI Ethernet Adapter Physical Address. . . . . . . . . : 08-00-XX-XX-XX-XX Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 192.168.1.3 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.1.1 DHCP Server . . . . . . . . . . . : 192.168.1.1 DNS Servers . . . . . . . . . . . : 192.168.1.1 Lease Obtained. . . . . . . . . . : 30 April 2010 12:22:02 Lease Expires . . . . . . . . . . : 01 May 2010 12:22:02 Ethernet adapter {8EB7A442-9683-45FB-A602-56110A4B3434}: Connection-specific DNS Suffix . : zzzz.zz Description . . . . . . . . . . . : Nortel IPSECSHM Adapter - Packet Scheduler Miniport Physical Address. . . . . . . . . : 44-45-YY-YY-YY-YY Dhcp Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : XXX.4.52.62 Subnet Mask . . . . . . . . . . . : 255.255.254.0 Default Gateway . . . . . . . . . : XXX.4.52.62 DNS Servers . . . . . . . . . . . : XXX.6.21.36 XXX.6.21.100

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• Windows 2008 R2 SMB / CIFS Logging to diagnose Brother MFC Network Scanning

  - by Steven Potter

  I am attempting to setup network scanning on a brother MFC-9970CDW printer. According to the Brother documentation, the printer is setup to connect to any CIFS network share. I applied all of the appropriate setting in the printer however I get a "sending error" when I try to scan a document. When I look at the logs of the 2008 R2 server that I am attempting to connect to; I can see in the security log where the printer successfully authenticates, however nothing else is logged. I would assume that immediately after the authentication, the printer is making a CIFS request and some sort of error is occurring, however I can't seem to find any way to log this information to find out what is going on. Is it possible to get Windows 2008 to log SMB/CIFS traffic? Followup: I installed Microsoft netmon and captured the packets associated with the transaction: 510 3:04:28 PM 7/9/2012 34.4277743 System 192.168.1.134 192.168.1.10 SMB SMB:C; Negotiate, Dialect = NT LM 0.12 {SMBOverTCP:30, TCP:29, IPv4:22} 511 3:04:28 PM 7/9/2012 34.4281246 System 192.168.1.10 192.168.1.134 SMB SMB:R; Negotiate, Dialect is NT LM 0.12 (#0), SpnegoToken (1.3.6.1.5.5.2) {SMBOverTCP:30, TCP:29, IPv4:22} 519 3:04:29 PM 7/9/2012 34.8986214 System 192.168.1.134 192.168.1.10 SMB SMB:C; Session Setup Andx, NTLM NEGOTIATE MESSAGE {SMBOverTCP:30, TCP:29, IPv4:22} 520 3:04:29 PM 7/9/2012 34.8989310 System 192.168.1.10 192.168.1.134 SMB SMB:R; Session Setup Andx, NTLM CHALLENGE MESSAGE - NT Status: System - Error, Code = (22) STATUS_MORE_PROCESSING_REQUIRED {SMBOverTCP:30, TCP:29, IPv4:22} 522 3:04:29 PM 7/9/2012 34.9022870 System 192.168.1.134 192.168.1.10 SMB SMB:C; Session Setup Andx, NTLM AUTHENTICATE MESSAGEVersion:v2, Domain: CORP, User: PRINTSUPOFF, Workstation: BRN001BA9AD1FE6 {SMBOverTCP:30, TCP:29, IPv4:22} 523 3:04:29 PM 7/9/2012 34.9032421 System 192.168.1.10 192.168.1.134 SMB SMB:R; Session Setup Andx {SMBOverTCP:30, TCP:29, IPv4:22} 525 3:04:29 PM 7/9/2012 34.9051855 System 192.168.1.134 192.168.1.10 SMB SMB:C; Tree Connect Andx, Path = \\192.168.1.10\IPC$, Service = ????? {SMBOverTCP:30, TCP:29, IPv4:22} 526 3:04:29 PM 7/9/2012 34.9053083 System 192.168.1.10 192.168.1.134 SMB SMB:R; Tree Connect Andx, Service = IPC {SMBOverTCP:30, TCP:29, IPv4:22} 528 3:04:29 PM 7/9/2012 34.9073573 System 192.168.1.134 192.168.1.10 DFSC DFSC:Get DFS Referral Request, FileName: \\192.168.1.10\NSCFILES, MaxReferralLevel: 3 {SMB:33, SMBOverTCP:30, TCP:29, IPv4:22} 529 3:04:29 PM 7/9/2012 34.9152042 System 192.168.1.10 192.168.1.134 SMB SMB:R; Transact2, Get Dfs Referral - NT Status: System - Error, Code = (549) STATUS_NOT_FOUND {SMB:33, SMBOverTCP:30, TCP:29, IPv4:22} 531 3:04:29 PM 7/9/2012 34.9169738 System 192.168.1.134 192.168.1.10 SMB SMB:C; Tree Disconnect {SMBOverTCP:30, TCP:29, IPv4:22} 532 3:04:29 PM 7/9/2012 34.9170688 System 192.168.1.10 192.168.1.134 SMB SMB:R; Tree Disconnect {SMBOverTCP:30, TCP:29, IPv4:22} As you can see, the DFS referral fails and the transaction is shut down. I can't see any reason for the DFS referral to fail. The only reference I can find online is: https://bugzilla.samba.org/show_bug.cgi?id=8003 Anyone have any ideas for a solution?

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• Hanging of host network connections when starting KVM guest on bridge

  - by Chris Phillips

  Hi, I've a KVM system upon which I'm running a network bridge directly between all VM's and a bond0 (eth0, eth1) on the host OS. As such, all machines are presented on the same subnet, available outside of the box. The bond is doing mode 1 active / passive, with an arp_ip_target set to the default gateway, which has caused some issues in itself, but I can't see the bond configs mattering here myself. I'm seeing odd things most times when I stop and start a guest on the platform, in that on the host I lose network connectivity (icmp, ssh) for about 30 seconds. I don't lose connectivity on the other already running VM's though... they can always ping the default GW, but the host can't. I say "about 30 seconds" but from some tests it actually seems to be 28 seconds usually (or at least, I lose 28 pings...) and I'm wondering if this somehow relates to the bridge config. I'm not running STP on the bridge at all, and the forwarding delay is set to 1 second, path cost on the bond0 lowered to 10 and port priority of bond0 also lowered to 1. As such I don't think that the bridge should ever be able to think that bond0 is not connected just fine (as continued guest connectivity implies) yet the IP of the host, which is on the bridge device (... could that matter?? ) becomes unreachable. I'm fairly sure it's about the bridged networking, but at the same time as this happens when a VM is started there are clearly loads of other things also happening so maybe I'm way off the mark. Lack of connectivity: # ping 10.20.11.254 PING 10.20.11.254 (10.20.11.254) 56(84) bytes of data. 64 bytes from 10.20.11.254: icmp_seq=1 ttl=255 time=0.921 ms 64 bytes from 10.20.11.254: icmp_seq=2 ttl=255 time=0.541 ms type=1700 audit(1293462808.589:325): dev=vnet6 prom=256 old_prom=0 auid=42949672 95 ses=4294967295 type=1700 audit(1293462808.604:326): dev=vnet7 prom=256 old_prom=0 auid=42949672 95 ses=4294967295 type=1700 audit(1293462808.618:327): dev=vnet8 prom=256 old_prom=0 auid=42949672 95 ses=4294967295 kvm: 14116: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079 kvm: 14116: cpu0 unimplemented perfctr wrmsr: 0xc1 data 0xffdd694a kvm: 14116: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x530079 64 bytes from 10.20.11.254: icmp_seq=30 ttl=255 time=0.514 ms 64 bytes from 10.20.11.254: icmp_seq=31 ttl=255 time=0.551 ms 64 bytes from 10.20.11.254: icmp_seq=32 ttl=255 time=0.437 ms 64 bytes from 10.20.11.254: icmp_seq=33 ttl=255 time=0.392 ms brctl output of relevant bridge: # brctl showstp brdev brdev bridge id 8000.b2e1378d1396 designated root 8000.b2e1378d1396 root port 0 path cost 0 max age 19.99 bridge max age 19.99 hello time 1.99 bridge hello time 1.99 forward delay 0.99 bridge forward delay 0.99 ageing time 299.95 hello timer 0.50 tcn timer 0.00 topology change timer 0.00 gc timer 0.04 flags vnet5 (3) port id 8003 state forwarding designated root 8000.b2e1378d1396 path cost 100 designated bridge 8000.b2e1378d1396 message age timer 0.00 designated port 8003 forward delay timer 0.00 designated cost 0 hold timer 0.00 flags vnet0 (2) port id 8002 state forwarding designated root 8000.b2e1378d1396 path cost 100 designated bridge 8000.b2e1378d1396 message age timer 0.00 designated port 8002 forward delay timer 0.00 designated cost 0 hold timer 0.00 flags bond0 (1) port id 0001 state forwarding designated root 8000.b2e1378d1396 path cost 10 designated bridge 8000.b2e1378d1396 message age timer 0.00 designated port 0001 forward delay timer 0.00 designated cost 0 hold timer 0.00 flags I do see the new port listed as learning, but in line with the forward delay, only for 1 or 2 seconds when polling the brctl output on a loop. All pointers, tips or stabs in the dark appreciated.

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• BSD Sockets don't behave in a iPhone 3G environment

  - by Kyle

  I noticed that many times while developing for an iPhone 3G, BSD socket functions will simply fail. I also noticed at the time, the 3G antenna wasn't even ON, nor was there WIFI Access to back up the network call (So it seems ridiculous that it doesn't turn on to support the network request).. This information was verified with an app from Apple in the SDK called Connectivity Test, or something of the sort. Basically if you load Safari or something, then quickly load up the App it would be fine.. Of course that's not ideal. Apparently, to apple, gethostbyname() or something of the sort is by no means a reason to turn on the Antenna. I contacted Apple about this, and they said that the BSD functions do not switch the Antenna on, but calling all of the Objective-C CFNetwork functions do. I want portable code, so is there a way to keep my existing BSD setup? I really dislike coding in Objective-C, so if anyone knows a work around, that would be awesome.

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• Cross-platform (microcontroller-PC) algorithm development

  - by Kyr

  Hello people! I was asked to develop a algorithm for network application on C. This project will be developed on Linux for PC and then it will be transferred to a more portable platform, something that will include a microcontroller. There are many microcontroller/companies out there that provide very nice and large libraries for TCP/IP. This software will hold statistics on the network performance. The whole idea of a cross platform (uC - PC) seems rubbish to me cause eventually the code should be written in a more platform specific way for the microcontroller, but I am not expert to judge anyway. Is there any clever way of doing this or is there a anyone that did this before? My brainstorming has "Wrapper library" and "Matlab"... Any ideas? Thx!

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• lowest latency, least overhead app server?

  - by Mark Harrison

  I'm designing an application which will have a network interface for feeding out large numbers of very small metadata requests. The application code itself is very fast, basically looking up data cached in memory and sending it to the client. What's the absolute lowest latency I can get for a network application server running on a linux box? This will be an internal app running on gigE with no authentication. Any language/framework considered, with a preference for C, C++, or Python. Likewise for protocol, although HTTP would be nice.

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• Updating a deallocated UIWebView from a background thread

  - by Dan Ray

  As you can see from the title, I've programmed myself into a corner and I've got several things working against me... In a UIViewController subclass that manages a large and complex view. One part of it is a UIWebView that contains output from a web request that I had to build and execute, and manually assemble HTML from. Since it takes a second or two to run, I dropped it into the background by calling self performSelectorInBackground:. Then from that method I call there, I use self performSelectorOnMainThread: to get back to the surface of the thread stack to update the UIWebView with what I just got. Like this (which I've cut down to show only the relevant issues): -(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { //then get mapquest directions NSLog(@"Got called to handle new location!"); [manager stopUpdatingLocation]; [self performSelectorInBackground:@selector(getDirectionsFromHere:) withObject:newLocation]; } - (void)getDirectionsFromHere:(CLLocation *)newLocation { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; CLLocationCoordinate2D here = newLocation.coordinate; // assemble a call to the MapQuest directions API in NSString *dirURL // ...cut for brevity NSLog(@"Query is %@", dirURL); NSString *response = [NSString stringWithContentsOfURL:[NSURL URLWithString:dirURL] encoding:NSUTF8StringEncoding error:NULL]; NSMutableString *directionsOutput = [[NSMutableString alloc] init]; // assemble response into an HTML table in NSString *directionsOutput // ...cut for brevity [self performSelectorOnMainThread:@selector(updateDirectionsWithHtml:) withObject:directionsOutput waitUntilDone:NO]; [directionsOutput release]; [pool drain]; [pool release]; } - (void)updateDirectionsWithHtml:(NSString *)directionsOutput { [self.directionsWebView loadHTMLString:directionsOutput baseURL:nil]; } This all works totally great, UNLESS I've backed out of this view controller before CLLocationManager hits its delegate method. If this happens after I've already left this view, I get: 2010-06-07 16:38:08.508 EverWondr[180:760b] bool _WebTryThreadLock(bool), 0x1b6830: Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now... Despite what this says, I can repeatably cause this crash when I back out too early. I'm not at all convinced that attempting a UI update from a background thread is really the issue; I think it's that my UIWebView is deallocated. I suspect that the fact I was just IN a background thread makes the runtime suspect something's up about that, but I feel fairly sure that's not it. So how do I tell CLLocationManager not to worry about it, when I'm backing out of that view? I tried [self.locationManager stopUpdatingLocation] inside my viewWillDisappear method, but that didn't do it. (Incidentally, MapQuest's apis are FANTASTIC. Way WAY better than anything Google provides. I can't recommend them highly enough.)

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• how to use XML sent by html form?

  - by user32167

  i have html form with textarea in which i paste some XML, for example: <network ip_addr="10.0.0.0/8" save_ip="true"> <subnet interf_used="200" name="lan1" /> <subnet interf_used="254" name="lan2" /> </network> When user submit form, that data is send to Java server, so in headers i get something like that: GET /?we=%3Cnetwork+ip_addr%3D%2210.0.0.0%2F8%22+save_ip%3D%22true%22%3E%0D%0A%3Csubnet+interf_used%3D%22200%22+name%3D%22lan1%22+%2F%3E%0D%0A%3Csubnet+interf_used%3D%22254%22+name%3D%22lan2%22+%2F%3E%0D%0A%3C%2Fnetwork%3E HTTP/1.1 how can i use that in my Java applications? I need to make some calculations on that data and re-send new generated XML.

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• Kickstart: ifcfg-eth0 file genorated by kickstart when install from network but from initrd when install form USB

  - by dooffas

  When I install Fedora 19 with a kickstart file and via network, the generated ifcfg-eth0 file is genorated by the kickstart: # Generated by parse-kickstart However if I use the same kickstart file and install via a USB stick, the ifcfg file is generated by initrd. # Generated by dracut initrd The line in the kickstart file to set the network settings is as follows: network --device=eth0 --bootproto=dhcp --hostname=SOMEHOSTNAME Is there away to keep network device settings set in the kickstart file when not installing via network?

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• Problem during JBoss Launch

  - by Rob

  Hi folks, I've a problem with JBoss 3.2.6. When I try to launch it, I get this error. 09:19:22,449 ERROR [StatefulSessionContainer] Starting failed jboss.j2ee:jndiName=TypicalBean,service=EJB java.rmi.ServerException: Could not bind home; nested exception is: javax.naming.CommunicationException: Network is unreachable [Root exception is java.io.IOException: Network is unreachable] at org.jboss.proxy.ejb.ProxyFactory.bindProxy(ProxyFactory.java:385) at org.jboss.proxy.ejb.ProxyFactory.start(ProxyFactory.java:187) and so on ... I use Java 1.6, and I can access to the Web, so I can't really figure out why this problem appears ... Thanks (and sorry for my poor english) Rob

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• XmlSerializer.Deserialize blocks over NetworkStream

  - by Luca

  I'm trying to sends XML serializable objects over a network stream. I've already used this on an UDP broadcast server, where it receive UDP messages from the local network. Here a snippet of the server side: while (mServiceStopFlag == false) { if (mSocket.Available > 0) { IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Any, DiscoveryPort); byte[] bData; // Receive discovery message bData = mSocket.Receive(ref ipEndPoint); // Handle discovery message HandleDiscoveryMessage(ipEndPoint.Address, bData); ... Instead this is the client side: IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Broadcast, DiscoveryPort); MemoryStream mStream = new MemoryStream(); byte[] bData; // Create broadcast UDP server mSocket = new UdpClient(); mSocket.EnableBroadcast = true; // Create datagram data foreach (NetService s in ctx.Services) XmlHelper.SerializeClass<NetService>(mStream, s); bData = mStream.GetBuffer(); // Notify the services while (mServiceStopFlag == false) { mSocket.Send(bData, (int)mStream.Length, ipEndPoint); Thread.Sleep(DefaultServiceLatency); } It works very fine. But now i'me trying to get the same result, but on a TcpClient socket, but the using directly an XMLSerializer instance: On server side: TcpClient sSocket = k.Key; ServiceContext sContext = k.Value; Message msg = new Message(); while (sSocket.Connected == true) { if (sSocket.Available > 0) { StreamReader tr = new StreamReader(sSocket.GetStream()); msg = (Message)mXmlSerialize.Deserialize(tr); // Handle message msg = sContext.Handler(msg); // Reply with another message if (msg != null) mXmlSerialize.Serialize(sSocket.GetStream(), msg); } else Thread.Sleep(40); } And on client side: NetworkStream mSocketStream; Message rMessage; // Network stream mSocketStream = mSocket.GetStream(); // Send the message mXmlSerialize.Serialize(mSocketStream, msg); // Receive the answer rMessage = (Message)mXmlSerialize.Deserialize(mSocketStream); return (rMessage); The data is sent (Available property is greater then 0), but the method XmlSerialize.Deserialize (which should deserialize the Message class) blocks. What am I missing?

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• Java Servlet says file does not exist

  - by Austin

  Hello World! I have developed a java servlet that monitors a folder on a network drive for new files then does some actions on them depending on what kind of file it is. It worked in Eclipse when Eclipse and Tomcat were running with each other, but now that I have deployed it onto a server(different machine), the servlet keeps logging that it cannot find the folder to be mapped. The exact same network drive is mapped, and the folder definitely exists. This problem only occurs when the servlet is run on the server, not on the development machine. Thanks! PS: It is a Windows Server 2003 Enterprise Server with Tomcat v6 installed.

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• When [script] file download fails, how can I tell why?

  - by Bruce

  My web application sends me diagnostic info from the browser javascript telling me that a [script] tag I've injected has failed to download the associated .js file. I can't reproduce this locally, and there is no particular pattern to which file fails, or what the browser type is. There is a pattern to the geo location of the requests - Mexico and Brazil are always more frequent - so I'm guessing that perhaps the internet in general is just more flaky there, and it is just network issues causing the failures. I'd really like to know for sure, though. Is there any way to determine, from the browser javascript, whether the failure occurred because of an error returned by the server, from a network error, or from a protocol timeout? I don't care if the mechanism is browser-specific, since it seems likely that the same issue is causing the error on all browser types.

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• Wireless not working on XP (with Intel® PRO/Wireless 2200BG Network Connection card and Zyxel router

  - by JohnIdol

  Hi all, I just got a new router, cant' get my old xp laptop (Toshiba Satellite) to connect to it, no matter if it's WPA-PSK or WEP (I was kind of thinking with WEP it would've worked but it doesn't). When I go connect and put in credentials the dialog stays up for a few minutes then disappears with no message and no connection is established. Here's the spec of router and wireless card: Wilreless card: Intel® PRO/Wireless 2200BG Network Connection Router: Zyxel P-660-HW-T1 v3 Everything works fine on my Vista machine (for once). Any help appreciated!

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• Setting static IP on CentOS without system-config-network

  - by Josh

  Background information: I have a problem installing system-config-network. It appears it cannot find an update to sqlite (checks every mirror and comes back empty handed.) I have tried the skipping broken option and package cleanups from yum-utils. Since I cannot get it installed, I decided to set an ip manually from console. A quick Google search comes back empty handed as for an easy how-to guide that works. What do I need to do for a currently configured DHCP ip to change it to a Static IP from console. Thanks, Josh

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• Windows Network Load Balancing on ESX Cluster with Dell PowerConnect stacks

  - by dunxd

  We recently switched out our Cisco 6500 core switch for a pair of Dell PowerConnect 6248 stacks. Since then, our Network Load Balanced Sharepoint, which runs on two virtual machines on an ESX cluster has been behaving very poorly. The symptoms are that opening and saving documents stored in sharepoint takes a very very long time. There are no errors showing up on the Sharepoint servers or SQL server, just a lot of annoyed users. Initially I thought there was no way NLB could cause this, but as soon as we repointed the DNS records for our intranet to the ip address of one of the web front ends, the problems disappeared. We suspect there is an issue related to multicast in the Dell configs - NLB is configured for multicast, but not IGMP. Has anyone got a similar set up to us and fixed this sort of issue? Sharepoint on VMware ESX, with Dell PowerConnect switches.

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