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• VM can't ping LAN name but sees it via nslookup

  - by amphibient

  I am trying to connect to a network resource from my 10.04.4 VM (VMware Fusion) but the destination is unreachable by name. What is weird is that the name is visible in DNS: >nslookup my.name Server: 123.45.67.89 Address: 123.45.67.89#53 Non-authoritative answer: Name: my.name Address: 10.20.30.40 I can reach it (via ping) by the IP address (10.20.30.40) but not the name and I thought that was weird because the DNS clearly resolves the name. What can I do to enable access to this resource via the name?

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• No keyring secrets found for [ssid] /802-11-wireless-security, ubuntu 12.04

  - by acimer

  I'm on Ubuntu 12.04 x64bit, installed it couple of days ago. The issue i'm having is this: on startup it connects to my wireless without a problem, but after a while I am disconnected and prompted to enter the key for the wireless network (which is entered - saved) so i just click 'ok', but wireless doesn't connect again. Reseting network manager doesn't help either. Only restart, after which, ubuntu connects to the said wireless without a problem. Terminal outputs this error message: ** Message: No keyring secrets found for cimermanovic /802-11-wireless-security; asking user. cimermanovic is the ssid name. also, here are some error messages that network manager is giving: (nm-applet:31926): GdkPixbuf-CRITICAL **: gdk_pixbuf_scale_simple: assertion `dest_width 0' failed (nm-applet:31693): GdkPixbuf-CRITICAL **: gdk_pixbuf_scale_simple: assertion `dest_width 0' failed (nm-applet:30184): GdkPixbuf-CRITICAL **: gdk_pixbuf_scale_simple: assertion `dest_width 0' failed What should i do to fix this? Thanks!

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• Other people's files showing up in rhythmbox

  - by Avery Boyer

  I have my computer connected to a college network, and right now files that belong to other individuals on campus are showing up under Shared in rhythmbox. This is driving me up the wall, I absolutely despise the idea that files are being thrown around on the network and that other people's s*** is showing up on my computer, and that they may be able to see my files as well. This is a very, very serious problem as far as I am concerned and I want to know how I can ensure that I am sharing nothing with the network in the way of files on my computer and that no one else's files are showing up on my computer.

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• System wide Proxy settings when on a windows network with a password

  - by sav

  I'm using Ubuntu on a windows network. I want to connect to the world wide web. I have followed the steps here which I have found very useful. However when I try to ping a website (eg: ping www.wikipedia.org) I get no reply. I can ping local computers on my network, but I need to go through our proxy to get to the world wide web. I can even browse wikipedia using firefox, I just needed to enter the proxy configuration script location and my username and password. I'm quite sure the reason I'm having this trouble is because I havn't entered a username and password. I'm not sure how to do this on a system wide level. ultimately I would like to be able to use package managers like synaptic but first I need them to be able to connect to the internet. EDIT As sugested I created a /etc/apt/apt.conf file like Acquire::http::Proxy "http://chrisav:[email protected]:8080"; Acquire::https::Proxy "https://chrisav:[email protected]:8080"; Acquire::ftp::Proxy "ftp://chrisav:[email protected]:8080"; Acquire::socks::Proxy "socks://chrisav:[email protected]:8080"; However I still cant ping wikipedia when I try installing stuff I get chris@chris-Ubuntu:~$ sudo apt-get install kate Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package kate

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• wireless card not detected

  - by user281219

  i have a old HP Compaq NX6125 with a new lunbuntu 14.04 32 bits install , but the wireless card is not working I have already done this steps and the wireless leds on the laptop are on but can't see any where the wireless interface , cloud`t do the last two steps . sudo apt-get remove bcmwl-kernel-source sudo apt-get install firmware-b43-installer b43-fwcutter Then Reboot And you need to activate the card from settings/network/wireless make it ON After this search for wireless icon at the task bar and look for your wifi. lshw -class network: *-network:0 description: Ethernet interface product: NetXtreme BCM5788 Gigabit Ethernet vendor: Broadcom Corporation physical id: 1 bus info: pci@0000:02:01.0 logical name: eth0 version: 03 serial: 00:0f:b0:f7:d1:0f size: 100Mbit/s capacity: 1Gbit/s width: 32 bits clock: 66MHz capabilities: pm vpd msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.134 duplex=full firmware=5788-v3.26 ip=192.168.1.120 latency=64 link=yes mingnt=64 multicast=yes port=twisted pair speed=100Mbit/s resources: irq:23 memory:d0000000-d000ffff *-network:1 description: Network controller product: BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller vendor: Broadcom Corporation physical id: 2 bus info: pci@0000:02:02.0 version: 02 width: 32 bits clock: 33MHz capabilities: bus_master configuration: driver=b43-pci-bridge latency=64 resources: irq:22 memory:d0010000-d0011fff *-network description: Wireless interface physical id: 1 logical name: wlan2 serial: 00:14:a5:77:9e:10 capabilities: ethernet physical wireless configuration: broadcast=yes driver=b43 driverversion=3.13.0-29-generic firmware=666.2 link=no multicast=yes wireless=IEEE 802.11bg

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• Google locking on Ubuntu

  - by user170534

  Problem I'm facing is that Google doesn't respond well timed to connection requests send from any browsers known to Linux. As far as I can tell, this was existent in Mint, which is Ubuntu based. I have no debug or guess about cause but I'm sure there are people with the same problem. ping of terminal is untouched but any other browser keeps unloaded, for example; google loads fine, I search for something. Then I decide to search for something else and ta daa: You gotta wait for 30 seconds for Google server to respond. I tried using google's public DNS without success. Flare the suggestions & ideas!?

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• Internet stopped working suddenly on 12.04

  - by Daniel

  My laptop was running smoothly until yesterday. Today, I can't connect to the Internet at home anymore. I am only able to access the router, but no Internet access. A have a Dell Latitude E6320 with Ubuntu 12.04. At my job, I don't have any problems connecting this laptop both via Wireless and Ethernet. At home, if I try connecting it through Windows, it does work fine. I even checked the MAC address and it's OK. My other laptop, which also runs Ubuntu, is not facing this problem. I have already tried to restart and downgrade network-manager package and its dependencies. Can anyone help me please? I am afraid, I will have to reinstall everything.

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• My internet connection slows or dies unexpectedly

  - by genesis

  I installed Ubuntu 10.04 once again and I'm having some problems which I had before, but I have no idea how I solved them. On Windows, everything's working fine and I had no problems with this. My problem is that sometimes, when browsing through the internet, webpages just start to load really slow, sometimes it doesn't load anything at all (Error 118 (net::ERR_CONNECTION_TIMED_OUT): The operation timed out.) and it starts to work after few minutes. My IPv4 settings are automatic (DHCP), and IPv6 settings are Ignored/Disabled. I think my previous problems had something to do with IPv6, but I'm not sure. Is there a fix for this? iwconfig lo no wireless extensions. eth0 no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"Fsite1" Mode:Managed Frequency:2.442 GHz Access Point: C8:3A:35:40:43:68 Bit Rate=0 kb/s Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:on Link Quality=43/70 Signal level=-67 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0

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• Strange Flash AS3 xml Socket behavior

  - by Rnd_d

  I have a problem which I can't understand. To understand it I wrote a socket client on AS3 and a server on python/twisted, you can see the code of both applications below. Let's launch two clients at the same time, arrange them so that you can see both windows and press connection button in both windows. Then press and hold any button. What I'm expecting: Client with pressed button sends a message "some data" to the server, then the server sends this message to all the clients(including the original sender) . Then each client moves right the button 'connectButton' and prints a message to the log with time in the following format: "min:secs:milliseconds". What is going wrong: The motion is smooth in the client that sends the message, but in all other clients the motion is jerky. This happens because messages to those clients arrive later than to the original sending client. And if we have three clients (let's name them A,B,C) and we send a message from A, the sending time log of B and C will be the same. Why other clients recieve this messages later than the original sender? By the way, on ubuntu 10.04/chrome all the motion is smooth. Two clients are launched in separated chromes. windows screenshot Can't post linux screenshot, need more than 10 reputation to post more hyperlinks. Listing of log, four clients simultaneously: [16:29:33.280858] 62.140.224.1 >> some data [16:29:33.280912] 87.249.9.98 << some data [16:29:33.280970] 87.249.9.98 << some data [16:29:33.281025] 87.249.9.98 << some data [16:29:33.281079] 62.140.224.1 << some data [16:29:33.323267] 62.140.224.1 >> some data [16:29:33.323326] 87.249.9.98 << some data [16:29:33.323386] 87.249.9.98 << some data [16:29:33.323440] 87.249.9.98 << some data [16:29:33.323493] 62.140.224.1 << some data [16:29:34.123435] 62.140.224.1 >> some data [16:29:34.123525] 87.249.9.98 << some data [16:29:34.123593] 87.249.9.98 << some data [16:29:34.123648] 87.249.9.98 << some data [16:29:34.123702] 62.140.224.1 << some data AS3 client code package { import adobe.utils.CustomActions; import flash.display.Sprite; import flash.events.DataEvent; import flash.events.Event; import flash.events.IOErrorEvent; import flash.events.KeyboardEvent; import flash.events.MouseEvent; import flash.events.SecurityErrorEvent; import flash.net.XMLSocket; import flash.system.Security; import flash.text.TextField; public class Main extends Sprite { private var socket :XMLSocket; private var textField :TextField = new TextField; private var connectButton :TextField = new TextField; public function Main():void { if (stage) init(); else addEventListener(Event.ADDED_TO_STAGE, init); } private function init(event:Event = null):void { socket = new XMLSocket(); socket.addEventListener(Event.CONNECT, connectHandler); socket.addEventListener(DataEvent.DATA, dataHandler); stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler); addChild(textField); textField.y = 50; textField.width = 780; textField.height = 500; textField.border = true; connectButton.selectable = false; connectButton.border = true; connectButton.addEventListener(MouseEvent.MOUSE_DOWN, connectMouseDownHandler); connectButton.width = 105; connectButton.height = 20; connectButton.text = "click here to connect"; addChild(connectButton); } private function connectHandler(event:Event):void { textField.appendText("Connect\n"); textField.appendText("Press and hold any key\n"); } private function dataHandler(event:DataEvent):void { var now:Date = new Date(); textField.appendText(event.data + " time = " + now.getMinutes() + ":" + now.getSeconds() + ":" + now.getMilliseconds() + "\n"); connectButton.x += 2; } private function keyDownHandler(event:KeyboardEvent):void { socket.send("some data"); } private function connectMouseDownHandler(event:MouseEvent):void { var connectAddress:String = "ep1c.org"; var connectPort:Number = 13250; Security.loadPolicyFile("xmlsocket://" + connectAddress + ":" + String(connectPort)); socket.connect(connectAddress, connectPort); } } } Python server code from twisted.internet import reactor from twisted.internet.protocol import ServerFactory from twisted.protocols.basic import LineOnlyReceiver import datetime class EchoProtocol(LineOnlyReceiver): ##### name = "" id = 0 delimiter = chr(0) ##### def getName(self): return self.transport.getPeer().host def connectionMade(self): self.id = self.factory.getNextId() print "New connection from %s - id:%s" % (self.getName(), self.id) self.factory.clientProtocols[self.id] = self def connectionLost(self, reason): print "Lost connection from "+ self.getName() del self.factory.clientProtocols[self.id] self.factory.sendMessageToAllClients(self.getName() + " has disconnected.") def lineReceived(self, line): print "[%s] %s >> %s" % (datetime.datetime.now().time(), self, line) if line=="<policy-file-request/>": data = """<?xml version="1.0"?> <!DOCTYPE cross-domain-policy SYSTEM "http://www.adobe.com/xml/dtds/cross-domain-policy.dtd"> <!-- Policy file for xmlsocket://ep1c.org --> <cross-domain-policy> <allow-access-from domain="*" to-ports="%s" /> </cross-domain-policy>""" % PORT self.send(data) else: self.factory.sendMessageToAllClients( line ) def send(self, line): print "[%s] %s << %s" % (datetime.datetime.now().time(), self, line) if line: self.transport.write( str(line) + chr(0)) else: print "Nothing to send" def __str__(self): return self.getName() class ChatProtocolFactory(ServerFactory): protocol = EchoProtocol def __init__(self): self.clientProtocols = {} self.nextId = 0 def getNextId(self): id = self.nextId self.nextId += 1 return id def sendMessageToAllClients(self, msg): for client in self.clientProtocols: self.clientProtocols[client].send(msg) def sendMessageToClient(self, id, msg): self.clientProtocols[id].send(msg) PORT = 13250 print "Starting Server" factory = ChatProtocolFactory() reactor.listenTCP(PORT, factory) reactor.run()

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• Wifi is connected but internet not working?

  - by Philip

  I have a lenovo x230 running ubuntu 12.04lts. I've been using it just fine for a while, but all of a sudden the internet's stopped working. It's connected to the router just fine (I can see the antenna bars saying it's connected) but when I try to go to a webpage, it's just loading forever. I've tried the fix listed here (http://ubuntuforums.org/showthread.php?t=1985079) but it hasn't done anything (the instructions are a little confusing though). I'm booting windows 7 right now and the internet works just fine when I'm on windows, so I know it must be a problem with ubuntu. I haven't touched any network settings before this problem happened, and I've been using it just fine for months, so I don't know why I'm getting this problem all of a sudden. Oh and I haven't updated anything in a few weeks (you know when the update manager pops up every so often listing all the things there's an update for) so I know it's not some update that broke it.

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• Fixing IP Renewal After Laptop Suspend

  - by Cerin

  I have a laptop running Ubuntu 10.04, and I've noticed that with some wifi networks, but not all, I'm unable to reconnect after coming out of suspension. I've tried both Network Manager and Wicd management daemons, and both get through validation, but get hung up on "Acquiring IP address...". The only solution I've found is to reboot the machine, after which it acquires an IP address very quickly. What's the underlying issue here? What would be a more efficient way to resolve the problem? EDIT: I've noticed that if I open Wicd and manually press "Connect", it fails to acquire an IP. However, if I do nothing and let it automatically try and connect, it acquires an IP and connects just fine...

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• No enable mobile broadband option

  - by noboot

  I just migrated from Wubi to actual dual booting Ubuntu and Windows 7 my machine is an Aspire 4750G. When I had (Wubi) Ubuntu 12.04 LTS 64-bit the network applet included the "enable mobile broadband" option. Now, I am using Ubuntu 12.04 LTS (32-bit) actual install as the 64-bit does not work. And my problem is that it does not show the "enable mobile broadband" option. This is so weird considering that I did not encounter the same problem in Wubi based installation.. Kindly help.. I have managed to connect to the internet via Sakis3G Script, still I find the previous method a lot more convenient..

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• How to change Port 27000 from filtered to open status

  - by Nadarajah Ranjan

  In my ubuntu box I am running flexlm licensing software on port 27000 and I am able to pull the license from the this port to run the simulation software locally. I am also trying to run the same software in another Linux machine (opensuse) by using the flexlm license from the Ubuntu box. However, my opensuse box is unable to communicate with port 27000 in my Ubuntu box. I have turned off the firewall on the Ubuntu box, played around with iptables and when I do a nmap from my opensuse box to Ubuntu box the message I get is that port 27000 is on filtered status. My understanding is that filtered status does not allow the opensuse box to communicate with Ubuntu. My question is how to change port 27000 from filtered status to open status? Hope someone can help me out. Thank you.

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• How to change the IP address on my Ubuntu virtual NIC

  - by DextrousDave

  I have a physical windows system, on which I run Vmware Workstation. Now on VMware I run Ubuntu 12.10. I am running a webserver on Ubuntu via LAMP, inside VMware. Problem: Now my local IP address for my virtual NIC (the one Ubuntu is using) has an address of 192.168.159.7, and my home router only issues IP addresses of the range 10.0.0.x. So if I want to port forward to the virtual NIC, which has a 192.168 address, I cannot, so my LAMP webserver cannot be accessed externally since the router does not know to send the packets on port 80 to the virtual NIC... How do I fix that? The only way I guess is to assign a 10.0.0.x ip address to the virtual NIC?? But how do I do that? I tried to do it on the host Windows machine with 'Get my IP address automatically' but it issues a 192.168 address every time... Thank you

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• System freeze after opening Wi-Fi menu can boot into the machine and use Internet in recovery mode

  - by Michael

  So right now sitting in front of my Alienware area 51 desktop. It has a Broadcom Netlink BCM 5784M gigabit ethernet PCI E card. Most of the time able to get through the login screen and to the main screen if I click on the wireless settings on the top right-hand corner the system immediately freezes the cursor does not move at all keyboards are unresponsive. I was doing some quick Google searching and I found a suggestion to boot into recovery mode I did this and did a apt-get Distribution update which ran successfully installed then I rebooted into the regular system same thing I'm pretty sure it's the network card because even if I don't click the settings if a network related dialog opens such as disconnection or connection the system again immediately freezes. I'm running Ubuntu 13.04 ** update 1 ** Just was able to use my system for a little bit however when I went into Firefox and hit the web it again froze so obviously a driver problem but I'm not sure how to get drivers for Broadcom which apparently according to the description on stack-overflow is terrible Any ideas? Sorry for lack of punctuation on an ipad.

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• Quickly and Python Twisted

  - by Aaron

  I am creating a Quickly application that makes use of Python Twisted. When the user launches a window, I want to start the Twisted server I wrote. However, when I do this, it freezes the GUI, because the reactor.run method is constantly running after it is started. I need a way to start the Twisted reactor in its own thread, so that the GUI will continue to operate while the reactor is running. I have read about using Twisted with pyGTK in the Twisted documentation, but I am not sure how I would accomplish this with a Quickly application. What is the best way to start my Twisted server when a window opens without freezing the GUI? Update: My if __name__ == '__main__' statement at the end of my dialog file is: print 'Preparing GLib' GLib.idle_add(before_running) print 'Staring Reactor' from twisted.internet import reactor reactor.run()` I have imported and installed twisted.gtk3reactor earlier on in the file. The before_running method contains dialog = ClientDialog() and dialog.show, as well as the rest of the code I want to run when the dialog opens.

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• Sending state diffs (deltas) and unreliable connections

  - by spaceOwl

  We're building a realtime multiplayer game, in which each player is responsible for reporting its state on every iteration of the game loop. The state updates are broadcasted using unreliable UDP. To minimize state data sending, we've come up with a system that will send only deltas (whatever state data that was changed). This method however is flawed, since a lost packet will mean that other players will not receive the delta, making the game behave in an unexpected way. For example: Assume that state is comprised of: { positionX, positionY, health } Frame 1 - positionX changed --> send a packet with positionX only. Frame 2 - health changed // lost ! Frame 3 - positionY changed --> send a packet with positionY only. // Other players don't know about health change. How can one overcome this issue then? sending the entire data is not always feasible.

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• Programming bots in games

  - by Bane

  I'm interested in how bots are usually written. Here's my situation: I plan to make an online 2D mecha game in HTML5, and the server-side will be done with node. It is intended to be multiplayer, but I also want to make bots in case there aren't enough players. How does my game logic see them, as players or as bots? Is there a standard by which I should make them? Also, any general tips and hints will be OK.

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• Procedural object generation and unique identification

  - by 2080

  My question relates to procedural content generation and data management of the emerging objects in a database. I assume a networked game, with a server-client model. Unspecified objects in the game world are generated while the game is running with procedural algorithms (for example perlin noise). The players (/clients) can modify the properties of these objects, but have to notify the server of these changes. How could this communication address unique objects, so that both the server and the client know of which object they are speaking? Not only the inner properties of the objects can differ, but also visible, such as the position. When the player wants to select one of these objects the game has to find out the id - does anyone know which methods or algorithms can accomplish that?

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• How do i Setup Different Users to Folders

  - by Erin

  I am trying to setup a Ubuntu Server for an office. Its going to be a file share server that 4-5 desktops connect to and access the files. Im planning on having different access for certain computers so computer 1 has full access but say computer 2 can only see a certain folder. My question is, is this possible and how would i go about setting it up? All workstations are using Windows XP - Vista.

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• 12.04 - why does the network icon dissapear every time my machine is turned off

  - by Howard Walker

  After spending an hour or two working out how to find the network Icon, I find that when I reboot the machine, I have to go through the whole procedure again. 1. The network menu is not there - so first I have to find the terminal. This has no particular location that I can find but usually I have to type terminal in the dash. 2. Then I have to type nm-applet in terminal 3. The network manager icon then appears, but only works if the terminal window remains open. Shut down the terminal window and the network disappears. This is a pain - plus I have to type my password in every time, which is another waste of time, thought this has always been a problem. So can anyone tell me how to make the web automatically connect at startup without any intervention from me.

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• Ubuntu 12.04 lts cannot build a wireless connection

  - by Jupiterr

  Hi i just got a new notebook and it came with ubuntu 12.04 lts operation system. But it can't make a wireless connection. I plugged in my Ethernet cable and i can reach the Internet with it but I need wireless connection so much. This is the first time I'm using ubuntu so i'm really confused. I can see wireless networks (including mine) but i cannot use them. It seems like it's establishing a connection but soon it gives up. Please help, I don't have much time for this and I do not have any idea about operation systems.

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• Wireless not connecting on Ubuntu 13.10, Toshiba Satellite pro L 650

  - by user204842

  I have just installed Ubuntu 13.10 on my Toshiba Satellite Pro L650. After several reboots, installing/ uninstalling the broadcom driver I still can't connect. It detects the wi fi signals and the icon flashes as if it's trying to connect but never actually does. I'm really quite rubbish with code and stuff, but I really like Ubuntu as an OS and would really appreciate any suggestions anyone can offer! 02:00.0 Ethernet controller: Qualcomm Atheros AR8151 v1.0 Gigabit Ethernet (rev c0) 03:00.0 Network controller: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01)

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• Ubuntu ver 14.04 Network discovery not showing up on windows 8 but on windows 7

  - by Schwabber

  I have an old PC that is now my new Ubuntu machine. Currently I was working on sharing a drive so that backups and streaming could take place. I have it set up perfectly on my windows 7 laptop (able to read and write to it). For some reason however my wife's windows 8 laptop is not showing up on the Ubuntu and vice versa. I turned on network discovery on the win8 machine, but that didn't help. Thanks in advance edit- I have my win7 and win8 in the same homegroup and both can see each other in the network. Also the workgroup is the same.

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• Advice on how to understand in general and in practice IT Infrastructure

  - by Luca

  My IT knowledge resides mainly in SW development. I have just some basic know how about networks. On the net I tried to get information and read books in order to better understand the overall IT infrastrcuture, but all the sources I found are too generic or, mainly, too detailed in just one aspect, making me lost. Could anyone suggest some books or web resources as good compromise in details? My goal would be able to understand the network issues and security threats when, for example, two remote system have to be setup and put in connection each other. Considering this scenario there are several aspects to consider: firewalls, intranet/internet interconnections, certificates for httpS, etc. The argument is quite wide, therefore I was looking for something that might help to start to understand this subject without going too deep in details (Computer Networks from A.Tanenbaum is a wonderful milestone, but way too specific for my scope). Thanks

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