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  • Cannot bind to IPv6 address

    - by ereOn
    I am facing a strange problem on my Ubuntu Karmic system. When I call getaddrinfo() with AI_PASSIVE and AF_UNSPEC, for an empty host and the UDP 12000 port to get a bindable address, I only get back one IPv4 result (0.0.0.0:12000 for instance). If I change my call and specify AF_INET6 instead of AF_UNSPEC, then getaddrinfo() returns "Name or service not known". Shouldn't I get [::]:12000 as a result ? The same thing happens if I set the host to ::1. When I call getaddrinfo() without AI_PASSIVE (to get a "connectable" address) for the host "localhost" and the UDP 12000 port, I first get [::1]:12000 then 127.0.0.1:12000. So apparently, my system is IPv6 ready (I can ping to both IPv4 and IPv6 addresses, as well as DNS resolution). But how is it that I can't get an IPv6 address to bind to with getaddrinfo() ? Do you guys have any idea about what could be wrong ? My OS is Ubuntu Karmic, fresh install without any networking tweaking. Thank you.

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  • Uniquely identifying mobile devices over a network for webforms

    - by Eric
    I'm designing a system for mobile devices that can be assigned only to one job at a time. So I need to be able to know which mobile device is being used by accessing it's own unique static IP address or its device ID. I don't want to assign an ID myself for every machine that comes in which is why a static IP would work great. However, in trying to retrieve the client ip address I'm retrieving the wireless router's ip or some other ip which is not the mobile device's ip. I want to store that ip in a table and control which jobs are assigned to it. How can I accomplish this? I've tried the following but I'm getting the wireless ip: var hostEntry = Dns.GetHostEntry(Dns.GetHostName()); var ip = ( from addr in hostEntry.AddressList where addr.AddressFamily.ToString() == "InterNetwork" select addr.ToString() ).FirstOrDefault(); I'd rather not set a cookie if there exists a better alternative. TIA!

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  • Change IP settings using C++

    - by Chris
    How do I change the IP settings of a Windows CE 6 box Programatically via C++? Functions for Windows might also work. I found that I can change the hostname via sethostname but couldn't find how to change IP address settings such as: IP Address DHCP Subnet Gateway DNS1 / DNS2 WINS1 / WINS2 Any advice / pointers would be great. Thanks. P.s. How would you get the box to update to those settings - is a refresh or the programming equivalent of ipconfig /renew required?

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  • Error becuase Virtual directory not being configured as an application in IIS

    - by Cipher
    Hi, I was trying to install a CMS in a folder in my website. After the installation on trying to run, it shows this error: Error 14 It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS. E:\Users\Sarin\Documents\Visual Studio 2010\WebSites\WebAssist\blog\web.config 61 I added the webiste as a Virtual Directory and also converted that to application. On trying to browse this application, the following error occurs as shown in the screenshot: http://i.imgur.com/jcRJe.jpg How to make this work?

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  • C++ and virtual methods overriding

    - by silent
    Sorry for this stupid question, but I can't find an answer by myself, I'm too new in C++ :( class DBObject : public QObject { ... protected: virtual QString tableName() { return ""; }; }; class DBUserObject : public DBObject { ... protected: virtual QString tableName() { return "profiles"; }; }; And I have this code in parent: bool DBObject::load(quint32 id) { QString query = QString("select %1 from %2 where id = :id") .arg(fieldList().join(",")) .arg(tableName()); <--- here is trouble ... } So I'm trying to execute: DBUserObject user; user.load(3); But in result I have a query with empty table name cause tableName() method returns empty string. Why not "profiles"?

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  • private virtual function in derived class

    - by user1706047
    class base { public: virtual void doSomething() = 0; }; class derived : public base { **private:** virtual void doSomething(){cout<<"Derived fn"<<endl;} }; now if i do the following: base *b=new child; b->doSomething(); //it calls the derived class fn even if that is private. Question: 1.its able to call the derived class fn even if that is private.How is it possible? Now if i change the inheritance access specifier from public to protected/private then i get compilation error as "'type cast' : conversion from 'Derived *' to 'base *' exists, but is inaccessible" Notes: I am aware on the concepts of the inheritance access specifiers.So in second case as its derived private/protected, its inaccessible. But here it confuses me for the first question. Any input will be highly appreciated

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  • Is it a good idea to use an integer column for storing US ZIP codes in a database?

    - by Yadyn
    From first glance, it would appear I have two basic choices for storing ZIP codes in a database table: Text (probably most common), i.e. char(5) or varchar(9) to support +4 extension Numeric, i.e. 32-bit integer Both would satisfy the requirements of the data, if we assume that there are no international concerns. In the past we've generally just gone the text route, but I was wondering if anyone does the opposite? Just from brief comparison it looks like the integer method has two clear advantages: It is, by means of its nature, automatically limited to numerics only (whereas without validation the text style could store letters and such which are not, to my knowledge, ever valid in a ZIP code). This doesn't mean we could/would/should forgo validating user input as normal, though! It takes less space, being 4 bytes (which should be plenty even for 9-digit ZIP codes) instead of 5 or 9 bytes. Also, it seems like it wouldn't hurt display output much. It is trivial to slap a ToString() on a numeric value, use simple string manipulation to insert a hyphen or space or whatever for the +4 extension, and use string formatting to restore leading zeroes. Is there anything that would discourage using int as a datatype for US-only ZIP codes?

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  • Getting a VMnet0 error in VMWare workstation after updating host computer from Windows 8 to 8.1

    - by Andrew
    Yesterday, I updated my computer from Windows 8 to 8.1. I have VMWare Workstation 10 running Windows XP on this computer and prior to the update I had no issues connecting to my network. However, since updating, I haven't been able to connect to any network and I'm getting the following error: "The network bridge on device VMnet0 is not running. The firtual machine will not be able to communicate with the host or with other machines on your network. Failed to connect virtual device Ethernet0" I've checked all of my settings which currently have my network adapter set for a bridged connection and under device status "connected" is checked. Not really sure where to go from here, but after doing some research I have seen that others users have reported getting this error when updating the OS (any OS, not windows 8 specifically) of the host computer. Thanks in advance to anyone who can help.

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  • Terminal proxy or screen without terminal emulation

    - by ZyX
    How can I make terminal applications immune to terminal emulator close, but still able to use all virtual terminal features? I see this must be something like screen, but without VT100 terminal emulation, something which will just apply whatever application does with "terminal proxy"'s terminal (like outputting something to stdout/stderr or using stty to set terminal options) to the terminal this proxy runs in. // I know about screen and altscreen on, but it makes either this (screen with TERM=screen): or this (screen with TERM=rxvt-unicode): while I want this (rxvt-unicode without screen): I have figured out that everything looks fine if I compile rxvt-unicode with USE=-xterm-color (in fact vim looks like on the second picture even without screen if I add this USE flag) and set TERM=screen-256color, but I do not like this workaround because it actually changes colors and I can't be sure that it will always change them only this way:

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  • STUN-server using AWS

    - by Yrlec
    We are about to hire some consultants to help us set up an AWS-based server environment that will enable us to handle NAT Traversal for our P2P application. One important part of the NAT Traversal infrastructure is the STUN-server (http://en.wikipedia.org/wiki/STUN). They just told us that in order for the STUN-server to work you must have two public static IP-addresses pointing to the same server. To more specific they said this: It appears that you need 2 static IPs for each server for the STUN to work. Please note, these IPs have to be put into the configuration file, therefore, each time you restart the instance you have to make sure you either use the same IPs or you have to update configuration. As you plan to use AWS for your installation, please confirm that you can have 2 static IP for each server. Our question is if this is possible using AWS and if so, how? If not, do you know any other way to set up a STUN-server using AWS?

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  • VM can’t connect to outside in bridged mode

    - by Kamal
    Hi Guys, I am not able to ping any machine(not even the host) from Guest VM in bridged mode. But I got an IP which is on the same subnet as host. I can ping my guest VM from the host and can use ssh to connect to the guest. I am using Vmware workstation 6.5. Guest VM is a centos VM and host is windows xp. Every thing works fine in NAT mode. Any clues as to what could be happening. I tried disabling all the firewalls I have. My virtual network editor shows that my ethernet adapter(the one my host uses) is used for bridging. It is connected. I don't understand how I can get an IP address from DHCP server. I can't ping any of the DNS servers in generated /etc/resolv.conf which are the same as that of my host

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  • apache2 force proxy for specific url on a subdomain

    - by Tony G.
    Hi, I have a site that has dynamic virtual subdomains using mod_rewrite, as defined like this: <VirtualHost *:80> ServerName example.com ServerAlias *.example.com DocumentRoot /var/www/example.com/www RewriteEngine on RewriteCond %{HTTP_HOST} ^[^.]+\.examle.com$ RewriteRule ^(.+) %{HTTP_HOST}$1 [C] RewriteRule ^([^.]+)\.example.com(.*) /var/www/example.com/$1$2 </VirtualHost> The problem is that I want a specific url, say subdomain.example.com/CONTROL/ to point back to www.example.com/ using a proxy (not url redirecting). I have tried adding: RewriteRule ^([^.]+)\.example.com/CONTROL(.*) /var/www/example.com/www$2 [P] But that didn't work. Any ideas?

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  • Display tracert on Google or Bing Maps

    - by WebDevHobo
    Is there a program of perhaps website that can display a list of ip-adresses on Google or Bing maps? For instance, if I do tracert -d www.youtube.com, I'll get a bunch of IP-addresses, displaying the path my request travelled. I'd think it funny to see this on a map, but I find it hard to enter all these IP-addresses manually. Does anybody know a program that can do this?

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  • Forwarding port to a VM - How to?

    - by Peter Gadd
    I use Win 8 Ent x64 on my PC, and I also have a Win 7 VMware virtual machine set up using a bridged network adapter. The IPv4 number for the Win 7 VM is 192.168.1.115. I require access to the VM from the Internet through port 1688. How do I set up port forwarding to achieve this? My router is a Cisco Linksys WAG120N. ========= If you require any further information to help me with this, I will gladly supply it. ========= Thanks in advance.

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  • How can I: Convert Physical to VM, the machine it's running on

    - by Daisetsu
    I have virtualized laptops before, when someone gets a new one and doesn't want to quite let go of their old laptop for fear of losing something. This was using VMWare Workstation 7.X. In 8.0 when I go to "Convert a Physical Machine to a Virtual Machine", it asks for an IP address and doesn't give the option to virtualize the machine it's running on. How to I get VMWare to virtualize it's current system? I tried typing in Localhost, and 127.0.0.1 but that didn't do it.

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  • Windows 2008 server hosting in Europe

    - by Lasse P
    Hi, I'm searching for a Windows 2008 server in Europe, preferably in Germany or UK or anything with good routing to Denmark (as its where the primary traffic will be generated from). The server will be used as web server (asp.net mvc, php), mail server and database server. We are running a few sites with around 200 concurrent users, which isn't much, but we intend to expand in the near future and the server should be easy to scale in form of adding more RAM and HDD space - if its possible. I think a virtual server may be the best choice - hyper-v or virtuozzo? - considering cost vs specs - but i'm open to suggestions. The max budget is in the range of $1000-1200/year. You guys have any suggestions? Let me know if you need further info.

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  • VPS IP redirects to website instead of the IP directory? CentOs 6

    - by Travis
    So before I started putting websites on my VPS, I could access the IP directly and it would access the html folder in the /var/www/ area. But ever since I placed websites on the VPS, I can no longer access that HTML folder, it goes to the first domain I have listed on the httpd.conf file. Is there a way I can make the IP its self look like a website in the httpd conf file? I tried to construct it like the other websites but httpd would stop working.

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  • Hyper-V performance comparisons vs physical client?

    - by rwmnau
    Are there any comparisons between Hyper-V client machines and their physical equivalent? I've looked around and can find 4000 articles about improving Hyper-V performance, but I can't find any that actually do a side-by-side comparison or give benchmarking numbers. Ideally, I'm interested in a comparison of CPU, memory, disk, and graphics performance between something like the following: Some powerful workstation (with plenty of RAM) with Windows 7 installed on it directly Same exact worksation with Hyper-V Server 2008 R2 (the bare Server role) and a full-screen Windows 7 client machine Virtual Server 2005 had performance that didn't compare at all with actual hardware, but with the advances in CPU and hardware-level virtualization, has performance improved significantly? How obvious would it be to a user of the two above scenarios that one of them was virtualized, and does anybody know of actual benchmarking of this type?

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  • What could prevent one Amazon EC2 instance from pinging another instance's Private IP?

    - by ks78
    I have multiple Amazon EC2 instances which need to communicate using private IPs. However, so far I've been unable to ping one instance's private IP from another instance. I can ping external addresses, such as their Elastic IPs and other sites (yahoo, google, etc), so it seems there's nothing wrong with the instances' network configuration. Also, they are all in the same zone, so that shouldn't be an issue. Does anyone have any idea what I could be doing wrong? Could this related to the Security Group settings?

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  • How to increase video memory in libvirt/KVM gui?

    - by Dejan
    In the 'Virtual Hardware details', it lists the model as 'cirrus' with 9MB of RAM. The RAM field cannot be changed, but how to increate the video RAM? My host OS is RH6 and gust OS is Fedora16. EDIT: From guest OS, when I run xvinfo it displays 'no adaptors present'. I was trying to play a video using gstreamers xvimagesink plugin (XFree86 video output plugin using Xv extension). The problem is that xvimagesink is using hardware acceleration for video performance and hence the error Could not initialize Xv output. I guess I'll have to configure hardware acceleration for the guest.

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  • Backing up VM data to host drive on Windows 7

    - by malcolms
    Hi, I have created a VM for Virtual PC in windows 7. I am writing a batch file to backup data in the VM to a host USB drive. I have shared the host drives. I have a USB drive that I want to backup to. But how do refer to the USB drive in the batch file. I cannot seem to map a drive to it, It is called "H on Malcolm-Desktop" in windows explorer. This is what I have tried. XCOPY C:\Inetpub\wwwroot "\\H on Malcolm-Desktop\HALII_VHD_Backup\DataBackup\Inetpub\wwwroot" /S /E /Y /D How do I write this command? Malcolm

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