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  • Vmware sphere setting up external network

    - by Tom Beech
    I've just setup vmware vsphere 5 on a remote server (rented dedicated server). I've added my first VPS (centos 5.8) barebones. It's not finding any IP (internal or external) on boot. I've had an extra external IP assigned to my server that I wanted to use on the VPS. I tried editing the eth0 config and adding the IP in there and turning off the DHCP, but it can't find any IP or ping google or do any networking type things. How do I route the IP to my VPS so I can access it remotely?

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  • Procedural, Semi-Procedural and Declarative Programming in SQL

    A lot of the time, the key to making SQL databases perform well is to take a break from the keyboard and rethink the way of approaching the problem; and rethinking in terms of a set-based declarative approach. Joe takes a simple discussion abut a problem with a UDF to illustrate the point that ingrained procedural reflexes can often prevent us from seeing simpler set-based techniques.

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  • Policy Routing with Openvpn?

    - by sadawd
    Dear Everyone I am currently using openvpn for normal browsing. However, I have the following services running: a bit torrent client, a web server, IRC and a git server which I would really want it to not be using my vpn connection (and use my original connection instead). Is there a way to do this? I looked up policy routing and I can't really find any tutorial on how to do this on linux (I am on ubuntu). I don't want the solution to be incredibly complicated - I am pretty new to networking in ubuntu and I only want a very simple solution to this problem. Can someone help me out?

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  • how do web hosting companies host end users domain and give so many public IPs

    - by Registered User
    Hi, I am a Computer Science guy who understands networking very well. But when it comes to Web hosting companies I am clue less. I want to know how do web hosting companies give so many public IPs to so many users and each of them has root login also. How this is technically done that is what I am interested to know. I do not know how you people configure it. In my case if I have to do I will buy a public IP from some one and connect my server to it and at max give some people SSH access to it.In case of Web hosting companies how is it done.

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  • How do I "telnet into [my] favourite Web server"?

    - by rookie
    I'm reading a book about programming, and I want to check an HTTP response message. The book is instructing me to telnet into your favorite Web server. Then type in a one-line request message for some object that is housed on the server: for example: telnet cis.poly.edu 80 GET /~hello/ HTTP/1.1 Host: cis.poly.edu What am I supposed to do, exactly? What program do I need? Where do I need to type this message?

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  • Why does eth0 show an IP if I'm booting into runlevel 1?

    - by banjer
    I'm having some issues with networking on a new Linux server I'm building. The OS is SLES 11. When booting into runlevel 1, I see that eth0 is showing an IP. Physically, there is a network cable plugged into the card associated with eth1, and then there is a network cable plugged into a QLogic iSCSI card (eth4, not shown). I've been troubleshooting this for awhile, and it seems like eth0 is somehow getting assigned an IP, even though it isn't configured in Linux or even plugged into the network for that matter. Thoughts? ifconfig -a Here is the ifconfig output (Sorry, I need more rep before I can post images on SF...)

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  • Cannot remove wireless network profile even though admin account is used

    - by David Karlsson
    On my windows computer which is connected to a company domain. I have problems with the wireless networking. First of all the computer fails to connect. Second of all I cannot remove the network from the list of wireless profiles. The properties window simply claims that "This network is administered by the Administartor Account". I am currently logged in as the local administrator. I have also tried creating a new admin account and still get the same problem when trying to remove the network. My computer has only the microsoft security essentials antivirus and some VMWare+virtual box connections that I can figure might interfere, but disabling realtime protection has not helped me on this. I also cannot delete the virtual network adapters from the control panel / network adapters...

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  • Freebsd or Linux? as BGP router over 100mbps

    - by Yucong Sun
    I am building a server to act as a BGP border router for my 100mbps uplink in ISP. I needs these feature: 1) Dual stack BGP peering/routing (at least 100Mbps, maybe more). 2) Potential full internet BGP feed. 3) Some basic ACL functionality. The hardware is L3426/8G ram. NIC will be on-board dual port Broadcom 5716. I've worked with Linux extensively before and it seems to be able to handle 100mbps, but I heard FreeBSD is faster on networking stuff. Which one should I use? And do we have some performance benchmark numbers out there? Cheers.

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  • What programming languages have you taught your children?

    - by Dubmun
    I'm a C# developer by trade but have had exposure to many languages (including Java, C++, and multiple scripting languages) over the course of my education and career. Since I code in the MS world for work I am most familiar with their stack and so I was excited when Small Basic was announced. I immediately started teaching my oldest to program in it but felt that something was missing from the experience. Being able to look up every command with the IDE's intellisense seemed to take something from the experience. Sure, it was easy to grasp but I found myself thinking that a little more challenge might be in order. I'm looking for something better and I would like to hear your experiences with teaching your children to program in whatever language you have chosen to do so in. What did you like and dislike? How fast did they pick it up? Were they challenged? Frustrated? Thank you very much!

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  • Bad style programming, am I pretending too much?

    - by Luca
    I realized to work in an office with a quite bad code base. The base library implemented in years and years is quite limited, and most of that code is, honestly, horrible. Projects developed in the office are very large. Fine. I could define me a "perfectionist" (but often I'm not), and I thought to refactor an application (really a portion), which need a new (complex) feature. But, today, I really realized that it's not possible to refactor that application modules with a reasonable time (say, 24/26 hours, respect the avaialable time for the task, which is 160 hours). I'm talking about (I am a bit ashamed to say) name collisions, large and frequent cut & paste code, horrible and misleading naming, makefiles without dependencies (!), application login is spread randomly across many different sources, dead code, variable aliasing, no assertion, no documentation, very long source files, bad/incomplete include file definition, (this is emblematic!) very frequent extern declaration of variables and functions, ... I'm sure to continue ... buffer overflows because sprintf, indentation (!), spacing, non existent const modifier usage. I would say that every source line was written quite randomly when needed, without keeping in mind some design (at least, the obvious one). (Am I in hell?) The problem arises when the application is developed by a colleague of mine. I felt very frustrated. So, I decided to expose the "situation" to my colleague; at the end, that was a bad idea. He is justified in saying that "the application was developed in haste, so it is natural that it is written vaguely; you are wasting time to think and implement an elegant implementation" .... I'm asking too much from my colleague to write readable code, which is managed and documented? I expect too much in not having to read thousands of lines of code to understand how a particular logic?

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  • Programming by dictation?

    - by Andrew M
    ie. you speak out the code, and someone else across the room types it in Anyone tried this? Obviously the person taking the dictation would need to be a coder too, so you didn't have to explain everything and go into tedious detail (not 'open bracket, new line...' but more like 'create a new class called myParser that takes three arguments, first one is...'). I thought of it because sometimes I'm too easily distracted at my computer. Surrounded by buttons, instant gratification a click away, the world at my fingertips. To get stuff done, I want to get away, write my code on paper. But that would mean losing access to necessary resources, and necessitate tedious typing-up later on. The solution? Dictate. Pros: no chance to check reddit, stackexchange, gmail, etc. code while you pace the room, lie down, play billiards, whatever train your brain to think more abstractedly (have to visualize things if you can't just see the screen) skip the tedious details (closing brackets etc.) the typist gets to shadow a more experienced programmer and learn how they work the typist can provide assistance/suggestions external pressure of typist expecting instructions, urging you to stay focussed Cons might be too hard might not work any better rather inefficient use of assisting programmer need to find/pay someone to do this

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  • Programming 101 [closed]

    - by Ashish SIngh
    i just got placed after completing my b.tech as an assistant programmer i am curious to know about some things.... i am not at all a very good programmer(in java) as i just started but whenever i see some complicated coding i feel like how man... how they think so much i mean flow and all... what should i do? should i just go with the flow or what?? java is very vast so nobody can memorize everything then how they find so many specific functions to use... should i try to memorize all the syntax stuff or just use google to things and with time it ll be all handy.... what should be my strategy to enhance my skills PS: i love java (crazy about it...) and one more thing, in my company i m not under much pressure so it is good or bad for me???? please guide me. i know you all can help me with your experience :) thank you.

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  • dialup connection script

    - by BParker
    I've just started working for a company who produce a specialist modem. In the test department they simulate actual use with a bunch of pc's acting as clients connecting over this modem. As such each needs to dial a set of dial-up connections. Each of these has to be created manually, and currently takes quite a while on each machine, so i was hoping to be able to automate the creation process. Back in the early days of the internet i remember getting CD's from ISP's where the dial-up connection was configured automatically, and i was wondering if anyone lknew how to do this, or if they could point me in the direction of a tutorial about it. To be clear, i don't want to automate actually dialing the connection, but i do want to run a script which creates the icons in the networking applet that allows us to dial these connection. Thanks in advance!!!

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  • Resources for SQL Server programming?

    - by Undh
    I have tried to search from the web resources for SQL Server programming. Basically I'm trying to search good tutorial for programming SQL Server (creating procedures, triggers, cursors etc.). Can you give some helping hand and show some links for good tutorials?

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  • How can email possibly be routed to the right place with no to: address?

    - by agent154
    I'm no novice on networking technology, but one thing I don't really know much about in detail is email and headers. How does email work SPECIFICALLY? I'm getting spam in my hotmail inbox when I've made painful attempts to not give out my actual email. I use my own domain name to forward email to my inbox using several aliases. Yet now I'm getting spam with no address in the to: line, or also "undisclosed recipients". Looking at the headers is of no help whatsoever. So from a technical standpoint, I have to wonder... if I send an email to a certain address in my personal domain and it gets forwarded to my hotmail account, how does hotmail know what inbox to dump the message in if that address is not listed in the headers?

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  • How did programming work when programmers used punchcards?

    - by Thomas Dignan
    I saw this: Learning to program on punchcards and I've seen this: http://en.wikipedia.org/wiki/Computer_programming_in_the_punched_card_era but they leave much to be desired. Can anyone explain to me how programmers programmed when they used punchcards? Specifically, the system of input computers used to derive instructions from the punched card itself. I do not know much about retrocomputers, so any one system of input you are familiar with would be fine. More general answers are also appreciated.

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  • Multicast accross the subnets

    - by Hasan Khan
    My application sends some UDP packets on a multicast address. In our office we have 3 subnets connected via routers. Sitting in my subnet I'm able to ping the IP of the other subnet. Will multicast packets cross my subnet and reach the machines of other subnets? Or router will need some configuration? Or do I have to program a bridge for it? Please note that I do not know anything about Networking. Kindly tell me something that I can ask my network admin to do.

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  • Wall jacks to patch panel?

    - by rj454me
    OK, I'm by no means a seasoned networking pro and I had no say so in the design of our current server room which is in dire need of an extreme makeover. Basically, in our server room we have 12 wall plates with 4 RJ-45 ports on each - 48 total RJ-45 ports. From these 48 ports is a spaghetti bowl of network cables feeding our servers located in a rack - there is no patch panel currently, just straight from the wall jack to each server. What I was wondering is, is it feasible to mount a 48 port patch panel in our server rack and feed into this patch panel from the wall jacks (of course nicely routing this cable through some new cable trays)? We really don't have the funds to mount the patch panel and have it fed directly from the switches in the telcom closet which is several hundred feet away. Current: Switch (Telcom Closet) - Wall Jacks - Servers Proposed: Switch (Telcom Closet) - Wall Jacks - Patch Panel - Servers

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  • When does "proper" programming no longer matter?

    - by Kai Qing
    I've been a full time programmer for about 8 years now. Web based mostly, ranging in weird jobs for clients. Never anything I "want" to do. So my experience is limited to what I've been contracted to do, having no real incentive to master anything in particular. So here's my scenario and ultimately what I wonder about... I've been building an android game in my spare time. It's using the libgdx library so quite a bit of the heavy lifting is done for me. I don't read much of the docs cause unless it's in tutorial format I will just not care, and ultimately most of my questions have already been asked on stackoverflow. I get along fine and my game works as expected... Suspiciously well, even. So much so that I wonder why one should bother to be "proper" when coding if the end result is ultimately the same. To be more specific, I used a hashtable because I wanted something close to an associative array. Human readable key values. In other places to achieve similar things, I use a vector. I know libgdx has vector2 and vector3 classes, but I've never used them. When I come across weird problems and search stackoverflow for help, I see a lot of people just reaming the questions that use a certain datatype when another one is technically "proper." Like using an ArrayList because it does not require defined bounds versus re-defining an int[] with new known boundaries. Or even something trivial like this: for(int i = 0; i < items.length; i ++) { // do something } I know it evaluates item.length on every iteration. I just don't care. I know items will never be more than 15 to 20 items. So why bother caring if I evaluate items.length on every iteration? So I wonder - why does everyone get all up in arms over this? Who cares if I use a less efficient datatype to get the job done? I ran some tests to see how the app performs using the lazy, get it done fast and don't look back method I just described versus the proper, follow the tutorial and use the exact data types suggested by the community. The results: Same thing. Average 45 fps. I opened every app on the phone and galaxy tab. Same deal. No difference. My game is pretty graphic intensive. It's not like it's just a simple thing. I expected it to perform kind of badly since I don't care to optimize image assets or... well, you probably get the idea. I'm making the game for fun. As a joke, really. But in doing so I'm working outside the normal scope of my job, which is to always follow the rules and do it the right way. So to say, I am without bounds here and this has caused me to wonder why I ever really care to be "proper" So I guess my question to you is this: Is there a threshold when it no longer matters to be proper? Is there a lasting, longer term consequence to the lazy, get it done and don't look back route? Is it ok to say - "so long as it gets the job done, I don't care?" Disclaimer: When I program my game, I am almost always drunk. I do it to remember why I got into this stuff to begin with because the monotony of client based web work will make you hate being a programmer. I'm having a blast and my game is not crashing, tests well, performs well, looks good on all devices so far and has no noticeable negative impact on any of my testing devices. I expected failure because I was being so drunkenly careless with my code, but to my surprise, it had no noticeable impact. I am now starting to question the need to be careful. Help me regain the ability to care! ... or explain why it's not a bad thing to not care. Secondary disclaimer: I am aware of the benefits of maintainability. For myself and others. Agreed. But it's not like someone happening across my inefficient int[] loop won't know what it does. As an experienced programmer those kinds of things are just clear on sight. I document the complex stuff for myself knowing I was drunk and will probably need a reminder. Those notes would clarify any confusion for someone who might ever gaze upon my ridiculous game - though the reality is that either I maintain it myself or it fades into time. I'm ok with that. But if it doesn't slow the device down, or crash, then crossing the t's and dotting the i's might actually require more time than it's worth.

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  • Hostname problems in CentOS 5.5

    - by spoon16
    I just set up a CentOS 5.5 machine on my local network and attempted to modify the hostname by editing /etc/sysconfig/network file. When I'm logged in locally the change to the hostname is reflected and seems to be working fine. When I open a SSH session via PuTTY from Windows this is what I see at the prompt: [root@? ~]# cat /etc/sysconfig/network NETWORKING=yes NETWORKING_IPV6=yes HOSTNAME=mini.local [root@? ~]# sysctl kernel.hostname kernel.hostname = ? [root@? ~]# hostname ? [root@? ~]# hostname -f hostname: Unknown server error A couple of other symptoms that may be helpful in troubleshooting this problem. I can ping the CentOS box from my Windows machine via IP but not hostname. Also, my Netgear router does not display the hostname when I view the "Connected Devices", I do see the mac address and the proper IP listed though. How can I make it so that the hostname is properly propagated throughout my network?

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  • A Simple Guide to Web Programming Services

    The internet has evolved dramatically over the past 10 years or so. From simple static webpages containing no more than text and images, it has transformed to highly interactive content. It has come to the point that the web may very well be your virtual desktop. This article describes the basic foundation of these websites and what makes them tick.

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  • XP Mode as a server, Win 7 as a client

    - by Spyro
    I have two virtual machines (XP Mode). They are connected to each other by a network setting - Internal Network. It is the only working setting. This is the only way I got two virtual XP to ping each other. Now I want to connect each of them from the application that runs on Windows 7 which is hosting both virtual machines, but I can't do that. The firewall on both XP-Mode machines is disabled. Any other networking setting added as additional adapter on Xp-Mode machine does not allow me to connect from Windows 7. So my question is this - how to enable connection from Windows 7 application to XP mode application (client - server)? Point 2 (pass message) work perfectly because of the "internal network" setting. The problem is point 1 and 3.

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