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  • Create and manage child name servers (glue records) within my domain?

    - by basilmir
    Preface I use a top level domain provider that only allows me to add "normal" third-party name servers (a list where i can add "ns1.hostingcompany.com" type entries... nothing else) AND "child name servers" which i can later attach to my parent account ( ns1.myowndomain.com and an ip address). They do not provide other means of linking up. I want to host my own server and dns, even with just one name server (at first). My setup: Airport Extreme - get's a static ip address from my ISP Mac Mini Server - sits behind the Airport and get's a 10.0.1.2 My problem is that i can't seem to configure DNS correctly. I added a "child nameserver" with my airport's external static ip address at the top level provider, so to my understanding i should have all DNS traffic redirected to my Airport. I've opened port 53 UDP to let the traffic in. Now, what i don't get is this. My Mini Server is sitting on a 10.0.1.2 address and i have setup dns correctly, with an A record to point and resolve my server AND a reverse lookup to that 10.0.1.2. So it's ok for "internal stuff". Here is the clicker... How, when a request comes from the exterior for a reverse lookup, does the server "know" ... well look i have everything in 10.0.1.2 but the guy outside needs something from my real address. I can't begin to describe the MX record bonanza... How do i set this "right"? Do i "need" my Mini Server to sit on the external address directly (i can see how this could be the preferred solution, being close to a "real" server i have in my mind). If not... do i need a PTR record on the 10.0.1.2 server but with the external address in there? My dream: I will extend this "setup" with multiple Mini's in different cities where i work. I want a distributed something (Xgrid comes to mind). PS. Be gentle, i've read 2 books and the subject, and bought both the Lynda Essentials and DNS and Networking to boot, still i'm far from being on top of things.

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  • Convert a CSV file to a XLS file on the linux command line?

    - by Rory
    I'm using Debian Linux and I want to convert a CSV file to an Excel XLS Spreadsheet file. The catdoc package includes the xls2csv command that converts from XLS to CSV. However it doesn't do the reverse. Since I just have a CSV file, I don't care about formatting or anything like that. I'm not worried if it only generates a very simple XLS file, and doesn't support the fancy new versions. Just so long as it's an XLS spreadsheet.

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  • NGINX Cache Viewstate and Cookies

    - by user42833
    We are running NGINX 7.65 on a Ubuntu 10 server. NGINX is setup as a reverse proxy to an IIS website where the viewstate is passed through the headers. We want to set up the cache feature in NGINX but need to make sure it does not mess up the viewstate and cookies associated with each individual customer. Will adding this to the nginx.conf file fix this - proxy_pass_header Header or is there more that would need to be done? Thanks,

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  • General advice from people in the industry - new graduate

    - by confusified
    I'm 20 years old and have just finished a 4 year Information Technology degree in Ireland, The main focus of the course was programming (mainly java) and software engineering. My question (posted in the wrong place as it may be) is : What technologies that I may not have studied should I attempt to teach myself that will be of the most benefit to me in searching for employment? All input appreciated.

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  • What is the logic behind IE7s Ctrl-Tab order?

    - by torbengb
    Using Ctrl+Tab in Internet Explorer 7 (on Windows XP) seems to follow no sequence that I can work out. Using Shift+Ctrl+Tab even jumps around with no clear logic in what tab order is being followed. It doesn't even work to the reverse as expected from using it in other programs, such as Firefox. Please explain to me how this key combo works in IE7 because I can't figure it out.

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  • Server to server replication and CPU and 32k\ corrupt doc

    - by nick wall
    Summary: if database contains a doc with 32K issue or corrupt, on server to server replication it causes marked increase in CPU in nserver.exe task, which effectively causes our server(s) to slow right down. We have a 5 server cluster (1 "hub" and 4 HTTP servers accessed via reverse proxy and SSO for load balancing and redundancy). All are physically located next to each other on network, they don't have dedicated network\ ports for cluster or replication. I realise IBM recommendation is dedicated port for cluster. Cluster queues are in tolerance and under heavy application user load, i.e. the maximum number of documents are being created, edited, deleted, the replication times between servers are negligible. Normally, all is well. Of the servers in the cluster, 1 is considered the "hub", and imitates a PUSH-PULL replication with it's cluster mates every 60mins, so that the replication load is taken by the hub and not cluster mates. The problem we have: every now and then we get a slow replication time from the hub to a cluster mate, sometimes up to 30mins. This maxes out the nserver.exe task on the "cluster mate" which causes it to respond to http requests very slowly. In the past, we have found that if a corrupt document is in the DB, it can have this affect, but on those occasions, the server log will show the corrupt doc noteId, we run fixup, all well. But we are not now seeing any record of corrupt docs. What we have noticed is if a doc with the 32K issue is present, the same thing can happen. Our only solution in that case is to run a : fixup mydb.nsf -V, which shows it is purging a 32K doc. Luckily we run a reverse proxy, so we can shut HTTP servers down without users noticing, but users do notice when a server has the problem! Has anyone else seen this occur? I have set up DDM event handlers for many of the replication events. I have set the replication time out limit to 5 mins (the max we usually see under full user load is 0.1min), to prevent it rep'ing for 30mins as before. This ia a temporary work around. Does anyone know of a DDM event to trap the 32K issue? we could at least then send alert. Regarding 32K issue: this prob needs another thread, but we are finding this relatively hard to find the source of the issue as the 32K event is fairly rare. Our app is fairly complex, interacting with various other external web services, with 2 way data transfer. But if we do encounter a 32K doc, we can't look at field properties, so we can't work out which field has issue which would give us a clue as to which process is culprit. As above, we run a fixup -V. Any help\ comments on this would be gratefully received.

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  • Is it possible to use Linux as a Fibre Channel Raid Disk Box?

    - by SvenW
    You probably all know the relatively simple RAID boxes exporting a bunch of SATA disks as one big drive via FC, SAS or iSCSI, like the HP StorageWorks MSA2000, Infortrends EonStore series or many different other models from different manufacturers. Is it possible to create such a device with Linux, a few disks and an FC controller, using the controller in the reverse direction than usual? This would come handy to test some ideas and concepts in an emerging SAN environment.

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  • Looking for a solid redirection infrastructre

    - by isoman
    We have critical servers (webservers and databases) that are fully replicated, except for the reverse proxy that we use to hide the internal stuff. This proxy is acting like a router that filters and redirects traffic to the main server and switch for failover if the main one is down. We want to find an alternative to this proxy because one single entry point is not enough. Is there any company that has a solid and redundant infrastructure that offers redirection to an IP and allows quick switching to another one?

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  • What's the logic behind the Ctrl-Tab order in Internet Explorer 7?

    - by torbengb
    Using Ctrl+Tab in Internet Explorer 7 (on Windows XP) seems to follow no sequence that I can work out. Using Shift+Ctrl+Tab even jumps around with no clear logic in what tab order is being followed. It doesn't even work to the reverse as expected from using it in other programs, such as Firefox. Please explain to me how this key combo works in IE7 because I can't figure it out.

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  • Nginx: bug using if in location, how do I rectify

    - by Quintin Par
    I am using nginx in reverse proxy mode. In my server section I have this code to set expire and cache control of my static files. location ~* ^.+\.(css|js|png|gif)$ { access_log off; expires max; add_header Cache-Control public; if (!-f $request_filename) { proxy_pass http://localhost:82; } } This is quite obviously creating issues. Can someone help me correct this code to use try_files or rewrite?

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  • What good Computer Science Podcasts are out there

    - by Hannes de Jager
    I listen to several podcasts about technology like Java,PHP,Linux and then I listen to Software Engineering Radio to help me along with Software Architecture, but I need a good podcast on Computer Science concepts and advances, especially one that will cover data structures like Trees and Graphs and its applications. Anyone know of such a podcast?

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  • summer training

    - by rohit-garg
    hi i wanna make a retail store software for my family retail store .... can anyone help me out with which language to use and just give me some basic ideas I'm an engineering student and have good knowledge of ASP, HTML, CSS, VBSCRIPT and have gone through java , c ,c++. please help me anyone

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  • PIC question..~

    - by RyozKidz
    I am currently undertaking software engineering program in one of the local universities at my country. And i am interesting in software and hardware. So i decided to learn it by myself. One of my seniors told me to start with PIC 16 or 18 first. Anyone of here has any links for the related website? And where can i get a device to program PIC other than ebay? thx in advance.

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  • What list of words can be used in commit messages after fixing a bug?

    - by mkafkas
    I am currently working on a senior project on software engineering and implementing a defect prediction mechanism in software projects which use version control system. Therefore, i want to ask the community about their commit message procedures. Which words in the commit messages may infer "bug fixed" meaning? So that, i can understand that the modified files in that revision was in a buggy state?

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  • Url rewrite rule

    - by vvr
    How to redirect a page form show.php?id=(15charstring) to show/(15charstring) I tried like this it is doing reverse means it is redirecting /show/(15chars) to show.php?id=(15chars) RewriteEngine on RewriteRule ^/show/([a-zA-Z0-9]{15})$ http://site.com/show.php?id=$1 Second case is i have to redirect to another page if he added &m=true to the url show.php?id=(15chars)&m=true html/show.php?id=(15chars).

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  • Is there ever a good reason to store time not in UTC?

    - by landon9720
    I am wondering if there are any good reasons to ever store time information in anything other that UTC (GMT)? I believe that this is a solid rule for all software engineering. The conversion to local time is merely a translation that happens at the UI layer for display purposes. I have also seen cases where the translatation is needed in order to implement an algorithm correctly (for handling midnight date changes, etc.).

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  • What kind of scaling method is it, when you add new software to a single server to handle more users? [on hold]

    - by Phil
    I have read about scaling (in terms of terminology and methods). This got me confused about the following: On a single computer, running a web server (say apache), if the system administrator adds a front, caching, reverse-proxy such as Varnish, which in that scenario increase the amount of requests this server is able to handle. My question: Setting up such cache increases the capacity of the server to handle work, hence scales it, but without increasing neither the amount of nodes or the node's capacity. What is the name for this type of scaling?

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  • rsync directories

    - by Buzzzz
    Hello, I'm trying to sync my music collection between my mac and my linux workstation but fails to mirror from my server share to linux. rsync -avz --progress Music/ /volumes/myserver/music works fine but the reverse on my linux ws doesnt. rsync -avz --progress /path/to/samba/share/music/ ~/Music does nothing.. Any clue what I have gotten wrong with this?? Best Regards Anders Olme

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  • Flexible array members in C - bad?

    - by Lionel
    I recently read that using flexible array members in C was poor software engineering practice. However, that statement was not backed by any argument. Is this an accepted fact? (Flexible array members are a C feature introduced in C99 whereby one can declare the last element to be an array of unspecified size. For example: ) struct header { size_t len; unsigned char data[]; };

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  • IE rendering problem of data

    - by pradeep
    http://ratingscorner.com/product_rating.php?alias=Rashtreeya-Vidyalaya-College-of-Engineering-Mysore-Road-Bangalore&product=colleges i have a page like the above .the page gets rendered properly in FF and other browsers. but in IE a small problem exits . IF you see the 1st box that is where the image and other features are displayed. the width of the box is differently shown in IE and FF. in IE the right hand side is getting cut off.

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  • How to match a variable list of items separated by commas

    - by user261915
    I want to turn something like this CS 240, CS 246, ECE 222, ... (more or less); Software Engineering students only into ('CS 240', 'CS 246', 'ECE 222', 'ECE 220') in Python, code that matches a single course looks like >>> re.search('([A-Z]{2,5} \d{3})', 'SE 112').groups() ('SE 112',) I prefer a regular expression only method because I have a bunch of other alternate reg exps using '|' to combine them. However, a method with split is acceptable.

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  • Session attacks, what are the new breeds of attacks ?

    - by user352321
    Hello, I am collecting as information as possible about http(s) session attacks. There is a plenty of information about existing attacks, but, i would like to know if some new breeds of attacks are now made possible either by security flaws in popular software or technologies or by new smarter security engineering. Do you have some recommendations about new techniques or tools ? Thanks,

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