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• postfix relay access denied from some IPs

  - by Caballero

  This is driving me nuts. I have Postfix/Dovecot set up on Centos 6 VPS for my emails. I can send and receive emails without any problems on my outlook (home broadband), on my Android phone (3G connection), however when I set up exactly the same email account on Outlook at my friends house I'm getting bouncebacks when I'm trying to send email (receiving works fine): 554 5.7.1 : Relay access denied Now if it wasn't working at all I'd understand, but why is it working on several internet connections, but not everywhere? Can someone shed some light on this? Where should I look for the problem?

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• LInux (Ubuntu Karmic) equivalent to Pawsense

  - by LRE

  I now work from a home office - much to the delight of my cats. One in particular likes to come for a hug several times a day. That in itself is fine but he tends to sit on my laptop keyboard whilst I'm working on my desktop and vice-versa. Also he'll walk across any keyboard I'm actually using at the time. I've found Pawsense and would like to know if anyone can suggest a Linux equivalent (or some incantations to achieve the same). Training him out of sitting on the keyboard is likely to prove fruitless (a suggested here). He's far more pig-headed than I am. This conversation discusses some utilities like xlock et al but I'd prefer if possible to have something more along the lines of Pawsense that doesn't lock the keyboard but "simply" intercepts cat-like typing. Thanks

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• Fiction that includes BASIC programs [closed]

  - by Clinton Blackmore

  Back in what must've been the mid-80s, when every microcomputer included BASIC and Choose Your Own Adventure Books were really popular, there were some novels that had BASIC programs listed in the text, for you to type in and further enjoy. For example, as I recall, in one of these books, the adventurers were infiltrating an undersea base (and eventually wiped the bad guy's data storage [I do believe it was a hard drive, even though they were uncommon then]). One of the programs involved a game were you piloted a submarine and had to avoid or shoot sharks. The code was in BASIC; minor changes (such as 'CLS' - 'HOME') had to be made for your specific computer, and it used good old 40-column text-mode to display the action. IIRC, the plot never depended upon the programs. My question is, does anyone else recall these sorts of books? Do you know any titles that I could look for, or of any online? I am toying with the idea of writing a story like this (no, not in BASIC!), and would really like to see how it was done, back in the day.

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• Do I really need Microsoft Updates?

  - by Tony Wong

  When I install a fresh copy of Windows XP Home (I bought it from the store.. not a copy), my PC rocks like lightening speed. But when I start installing all the updates, patches & less .NET 4.0 client (as the .NET 4.0 Client seems to bring machine to slow crawl). The PC starts to slow down.. like there are more resources to watch or something is happening in the background. So could I not get away with an awesome virus protector and an awesome firewall set-up and avoid all the patches? The machine I have is a quad 4, 4 GB RAM and 2.3 GHz process. Tons of room and the machine can run several applications at one time.. but when the updates happen.. it's s-l-o-w!

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• 1 iPhone, 2 (potentially 3) Macs......& Google Apps Sync?!

  - by Goober

  Currently I use a beast of a G5 Mac at work for all my software/web development, an iMac G5 at home for personal use & a MacBook Pro for when i'm on the go. At work we make heavy use of all the Google Apps features such as calendar & docs etc. We all have an address book (local mac application) that gets synced with a list of contacts stored on our mail server. I want to be able to integrate the Google Apps calendar with my iPhone calendar (or even just iCal - which i can then sync to the iPhone). Essentially I want all three Macs to have the Google calendar synced to their version of iCal including the iPhone. I've heard that Google Sync handles something along these lines but i'm unsure if it's going to fulfill my needs? I'm trying my best to avoid having to use MobileMe..... Help greatly appreciated, Kind regards

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• Using Windows 7 XP Mode for games

  - by Josefvz

  Hi all. I have Win 7 (x64) at home and I want to play some old games (specifically Lands of Lore 3, but also some others). This game does not work properly on Win 7, and there are no patches that I'm aware of to fix its issues. Can I use XP Mode to play this game (and other non Win 7 nice games), or is there a better way? I only have one PC and dual booting scares me... (so no to dual booting!) Another question: Will I have full hardware support (full use of my graphics card, etc) when I use DOSbox or a VM? I have decided to go with VirtualBox or vmware, I'll check which one gives the best performance, thanks for your input!

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• Have you considered switch from Windows to OS X?

  - by Oscar Reyes

  For several years I wanted to move from Windows to OSX. Mainly because back then Windows95/98/2000 were terrible options. Now I have finally put my hands on this. Just when Vista and Win7 seems to redeem all the mistakes from their predecessors. The most terrible rant is the lack of the following keys: PageUp, PageDown, Home, End, Supr Not having those made my first programming day terrible on OSX. I don't regret switching, but somehow I expected something else. So: Have you considered switch to mac? What has stopped you? What is holding you back? If you have switched already, are you willing to comeback? (Now I run XP/Vista/Ubuntu/OSX in the same machine, yeah!!)

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• Getting Synergy+ to work with Windows 7 64bit and Windows XP 32bit?

  - by john crisp

  My Windows XP box is Dell 4550 dimension. Windows 7 box is Home Premium. Synergy + installs fine on the Windows 7box, but using Windows xp as the client, it won't work? Do I need to disconnect the vga connection from my monitor and control entirely from the win7 dvi connection? In setting up ( links ) on Windows 7 as the server, I have NO way of inputing info? The setup on the Windows xp box is simple and does so OK, but I can't connect to the Windows xp box! It must be the vga connection on the Windows XP box. In order to use both machines, I have to turn one off and the other on. Hence-the VGA is needed on Windows XP. Any info/help most appreciated.

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• How to connect Android phone to a Wifi network using PPPoE?

  - by Slavo

  I have an ISP at home, which provides me with a PPPoE connection. My router supports that and I've configured it to autoconnect periodically, so I don't have to type my username and password each time. When I connect to the Wireless router from the PC, I have internet and everything works fine. However, when I do so using my Android phone, there's no internet connection on the phone. It connects to the router, but I cannot open any web page. How can I enable internet access from such an ISP on my phone? Is it something in the router setup? The router is Linksys WRT54GL.

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• Looking for Kiosk-style / camera store easy photo memory card to CD/DVD burning program for Windows-7 Notebook? For non techie user.

  - by Rob

  I'm looking for a Kiosk-style / camera shop easy photo memory card to CD/DVD burning program? For non technie user. The kind of system you see in a camera shop / store, e.g. in the UK, Jessops and Boots stores. This is for my Dad who is adept at general PC usage as a notebook owner, but would prefer something fairly simple. The task of burning photos to CD/DVD, in their original photo file .jpg form, i.e. NOT as CD or DVD video or slideshow, is what I'm looking for. I'm guessing this might be possible in Picasa, but all the options available might be superfluous and confusing. He could probably learn to use that but thought I would try simpler options first. Looking for something that guides the user through the steps/stages of the process, 'Wizard' style. Any suggestions? Platform: HP Windows 7 Home notebook with CD/DVD burner and SD memory card slot.

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• NVIDIA X Server TwinView isses with 2 GeForce 8600GT cards

  - by Big Daddy

  Full disclosure, I am relatively new to Linux and loving the learning curve but I am undoubtedly capable of ignorant mistakes I have a rig I am building for my home office desktop. The basics: Gigabyte MB AMD 64bt processor Ubuntu 12.04 64bit two Nvidia GeForce 8600GT video cards using a SLI bridge two 22" DVI input HP monitors So here is my issue (it is driving me nuts) with X Server. If I plug both monitors into GPU 0 X Server auto configures TwinView and all is grand, works like a charm, though both are running off of GPU 0. If I plug one monitor into GPU 0 and one monitor into GPU 1, X Server enables the monitor on GPU 0, sees but keeps the monitor on GPU 1 disabled. My presumption (we all know the saying about presumptions) is that all I would have to do is select the disabled monitor on GPU 1 and drop down the Configure pull down and select TwinView...problem is when the monitors are plugged in this way, the TwinView option is greyed out and can not be selected. What am I not understanding here? Is there some sort of configuration I need to do elsewhere for Ubuntu to utilize both GPU's? Any help will be most appreciated, thanks in advance.

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• how do i automatically add a new route to the routing table?

  - by Robbie Mckennie

  I'm looking at linking two networks with a long range Ethernet bridge. I know I can connect my two networks with a router, but my problem is how will my computers know where to send packets if I don't add the route manually? I COULD add them manually, but it seems like a hassle. I have very very limited knowledge of RIP (I know it has something to do with routing), but I don't know how to use it. edit: My vision for the network would be the 2 networks (which are currently independent home networks), connected by a microwave Ethernet link. I assumed i'd need a router on one end of the bridge, to handle communication between the 2 networks.

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• Proxied calls not working as expected

  - by AndyH

  I have been modifying an application to have a cleaner client/server split to allow for load splitting and resource sharing etc. Everything is written to an interface so it was easy to add a remoting layer to the interface using a proxy. Everything worked fine. The next phase was to add a caching layer to the interface and again this worked fine and speed was improved but not as much as I would have expected. On inspection it became very clear what was going on. I feel sure that this behavior has been seen many times before and there is probably a design pattern to solve the problem but it eludes me and I'm not even sure how to describe it. It is easiest explained with an example. Let's imagine the interface is interface IMyCode { List<IThing> getLots( List<String> ); IThing getOne( String id ); } The getLots() method calls getOne() and fills up the list before returning. The interface is implemented at the client which is proxied to a remoting client which then calls the remoting server which in turn calls the implementation at the server. At the client and the server layers there is also a cache. So we have :- Client interface | Client cache | Remote client | Remote server | Server cache | Server interface If we call getOne("A") at the client interface, the call is passed to the client cache which faults. This then calls the remote client which passes the call to the remote server. This then calls the server cache which also faults and so the call is eventually passed to the server interface which actually gets the IThing. In turn the server cache is filled and finally the client cache also. If getOne("A") is again called at the client interface the client cache has the data and it gets returned immediately. If a second client called getOne("B") it would fill the server cache with "B" as well as it's own client cache. Then, when the first client calls getOne("B") the client cache faults but the server cache has the data. This is all as one would expect and works well. Now lets call getLots( [ "C", "D" ] ). This works as you would expect by calling getOne() twice but there is a subtlety here. The call to getLots() cannot directly make use of the cache. Therefore the sequence is to call the client interface which in turn calls the remote client, then the remote server and eventually the server interface. This then calls getOne() to fill the list before returning. The problem is that the getOne() calls are being satisfied at the server when ideally they should be satisfied at the client. If you imagine that the client/server link is really slow then it becomes clear why the client call is more efficient than the server call once the client cache has the data. This example is contrived to illustrate the point. The more general problem is that you cannot just keep adding proxied layers to an interface and expect it to work as you would imagine. As soon as the call goes 'through' the proxy any subsequent calls are on the proxied side rather than 'self' side. Have I failed to learn or not learned something correctly? All this is implemented in Java and I haven't used EJBs. It seems that the example may be confusing. The problem is nothing to do with cache efficiencies. It is more to do with an illusion created by the use of proxies or AOP techniques in general. When you have an object whose class implements an interface there is an assumption that a call on that object might make further calls on that same object. For example, public String getInternalString() { return InetAddress.getLocalHost().toString(); } public String getString() { return getInternalString(); } If you get an object and call getString() the result depends where the code is running. If you add a remoting proxy to the class then the result could be different for calls to getString() and getInternalString() on the same object. This is because the initial call gets 'deproxied' before the actual method is called. I find this not only confusing but I wonder how I can control this behavior especially as the use of the proxy may be by a third party. The concept is fine but the practice is certainly not what I expected. Have I missed the point somewhere?

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• Solaris mounting partitions

  - by Benco

  I'm trying to mount a partition in solaris 10... bash-3.00# mount /dev/dsk/c0t0d0s3 /data mount: /dev/dsk/c0t0d0s3 is already mounted or /data is busy As far as I know c0t0d0s3 isn't already mounted elsewhere, so what's really going on here? From /etc/mnttab : /dev/dsk/c1t0d0s0 / ufs rw,intr,largefiles,logging,xattr,onerror=panic,dev=7800001285811136 /devices /devices devfs dev=4840000 1285811125 ctfs /system/contract ctfs dev=48c0001 1285811125 proc /proc proc dev=4880000 1285811125 mnttab /etc/mnttab mntfs dev=4900001 1285811125 swap /etc/svc/volatile tmpfs xattr,dev=4940001 1285811125 objfs /system/object objfs dev=4980001 1285811125 sharefs /etc/dfs/sharetab sharefs dev=49c0001 1285811125 /usr/lib/libc/libc_hwcap1.so.1 /lib/libc.so.1 lofs dev=780000 1285811131 fd /dev/fd fd rw,dev=4b40001 1285811136 swap /tmp tmpfs xattr,dev=4940002 1285811137 swap /var/run tmpfs xattr,dev=4940003 1285811137 -hosts /net autofs nosuid,indirect,ignore,nobrowse,dev=4c00001 1285811148 auto_home /home autofs indirect,ignore,nobrowse,dev=4c00002 1285811148 cordb:vold(pid530) /vol nfs ignore,noquota,dev=4bc0001 1285811149 I suspect the problem is not related to the mount point, but rather the disk slice I'm trying to mount: bash-3.00# newfs -v /dev/dsk/c0t0d0s3 /dev/rdsk/c0t0d0s3: Device busy

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• Network: Incoming connections work, outgoing fails

  - by anirvan

  i recently set up my own server at home to run Ubuntu 12.04 server ed. on booting up, i noticed that a message related to networking comes up, and the booting process pauses. the message read something like - waiting for network configuration and after a while - waiting another 60 seconds... on booting up, I realised that any command which requires a network connection was not working - ping, apt-get install, etc. on firing the ifup eth0 command, I get the error RTNETLINK answers: File exists. Failed to bring up eth0. I also realised, while searching the web for this problem, that this is probably one of the most common networking related issues - however, most of the questions are around setting up multiple IPs for the same machine. ifdown eth0 also fails, stating that eth0 is not configured. my /etc/network/interfaces file has a simple configuration for a static IP: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address xx.xx.xx.xx netmask xx.xx.xx.xx broadcast xx.xx.xx.xx gateway xx.xx.xx.xx dns-nameservers xx.xx.xx.xx The strangest part of this problem is that, while I can't connect to anything outside, I can ping to this particular server using the static IP configured in the interface file, and, i can even SSH into it! I'm really at ends here with this problem, and any guidance is much appreciated. Thanks!

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• Digital HD Transition

  - by Bill Evjen

  The HD Experience Roughly 53% of the viewing public has HD capable devices in their home 24% think they are watching HD while they have no subscription to any HD content Today’s HD Considerations Choices abound: format resolution – 720p, 1080i/p frame rates compression and wrapping audio compression and delivery metadata packaging, delivery, and usage content delivery protocols Metadata is going to be a part of the overall experience With emerging technologies: Super Hi-Vision (SHV, UHDTV 4320p), 3D HEVC/H.265, WEBM/VP8 HDBaseT, P2PTV Dolby Pulse/HE-AAC Industry standardization Metadata registration, packaging, and delivery standards Improved picture and sound quality is a logical next step but we need to also think about the end to end viewing experience including; 3D video and audio content Mixed-mode viewing to bring interactive and immersive experiences Content Transportability both on-to and off-of the aircraft High Definition Standardization Analog switch off around the world DTV transition completed: 17 countries DTV transition in progress: 45 countries The EU has mandated the end of 2012 as the final date for Analog Switch Off D-Cinema was standardized by SMPTE in 2006 Airlines are installing HD displays today Passengers are bringing their own devices now HD TV on airlines are getting bigger and bigger – bigger than SD was – now up to 23” Gray scale data input for color – 6 to 8 bit Contrast – 400 to 700 Backlit – LED Encryption – can it be the same for HD? PPV in the cabin?

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• rsync - how to set/keep directory permissions?

  - by Dylan

  I'm using CwRsync to connect from my Windows development machine to a linux webserver : rsync -avuz -e ./ssh --exclude=".svn" /cygdrive/c/xampp/htdocs/project123/ [email protected]:/home/user123/public_html This syncs my development project directory nicely and fast to the server. But after doing this, all directory properties are reset to the local user 'user123' only, so the website is not available anymore. I need to manually reset those properties. Why is this happening, and how to prevent it? PS. coming from a Windows environment I'm having a really hard time understanding rsync. I copied the above command from some examples... just need to get this one small thing working too...

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• Is there a way to make scp run faster on a Mac OS X?

  - by paul_sns

  I'm trying to a upload a Flex generated SWF file from my Macbook (running Snow Leopard) using the command scp main.swf server.com:/ I had setup key authentication to prevent typing the user/pass every time. This process normally takes up to two minutes using my connection at home (768kbps down/300+ kbps up). The interesting part is that when I use WinSCP in my Windows XP machine, the process only takes 30 seconds max. Both my MacBook and Windows XP machine use the same internet connection. The MacBook is connected to the router via cable (which should be faster right?) while the Windows XP connects through Wifi. Let me know if you need additional information in order to diagnose the problem. Thanks!

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• Minimum Requirements for (open) Solaris?

  - by Electrons_Ahoy

  I'm thinking about knocking together a Solaris box at home to act as a combination server and learning exercise. What are the minimum hardware specs I can throw at it such that it'll be actually usable? I'd be cobbling the machine together from a stack of various x86 PC spares/leftovers. Does anyone have experience with Solaris at the lower end of the spectrum? The Sun site, for example, claims it'll run with as little as 255 megs of ram, but is it worth the exercise with less than a gig? Will my old Pentium II 450 cut the mustard? (I'm willing to throw a couple of bucks at pricewatch/mwave/newegg on this, but if I need to build a better rig than my main PC, I may not bother.)

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• Gaming Community CMS, with forum integration [closed]

  - by Tillman32

  Possible Duplicate: Which Content Management System (CMS) should I use? I've had a simple website that I coded myself for a while now, the site is a gaming community. It's very forum and news driven. It was a HORRIBLE idea to take on coding this thing myself. Although we've used it for about a year now, we're just getting too big, and I need to streamline our work. I need writers to post news, etc. I've been doing it through code. ( A year ago I thought it would be a cool idea ) Anyway, I've been messing with just about every CMS out there, and I'm struggling to get something that I really like. The main issue I'm facing, is a good news system, and good forum integration. I'm sort of picky when it comes to looks, its a curse. Reading on here, I see a lot of people saying Drupal is the best for the 3 things I need, community interaction, and forums. I think the main issue that I ran into with drupal, was ease of use, and themes. I am not a web designer, and I need a good theme. For an idea of what I'm looking for, go check out http://www.clgaming.net, they have forums integrated, a nice news area on home page/news section, and nice user accounts. It looks very professional, and I doubt I'll get close to that with a free theme, but their functionality is exactly what I need. Any ideas would be greatly appreciated.

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• Internet Explorer 8 only running as process not application

  - by Lord Peter

  Internet Explorer 8 on XP SP3 starts without browser window. Task manager doesn't show application, but iexplore.exe is listed twice in process window. Process Explorer reports "no visible windows found for this process" when I try to "bring to front" in the iexplore.exe properties dialog. Have reinstalled (twice), full scanned with MBAM/MSSE/SpyBot etc, re-registered ieproxy.dll (another Google-inspired tip!), run without addons (-extoff switch), and still same problem. Recently uninstalled VMWare Player and wondered whether problem related to VM network adapter somehow, but Firefox still works perfectly. This is one of my home machines, not critical, and it is backed up, so I will restore if I have to. But any and all suggestions will be gratefully received. It would be nice to understand what might have happened, and perhaps others may benefit from any knowledge that comes to light.

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• Creative software leftovers - ASIO error message

  - by Tony Patriarche

  I temporarily installed an old Creative Audigy 2 soundboard on my Vista x64 Home Premium computer. Bad idea! I uninstalled the board & all software visible on the control panel. Now, with one particular app. (Sibelius) I keep getting a start-up message "CTASIO Warning: Creative ASIO: there are no Creative audio products installed on the system that support ASIO". I offer this as a candidate for "Most useless message", but that's beside the point. I used a commercial registry cleaner (PC-Tools Registry Mechanic) and then edited the registry looking for "creative", "audigy" and "ASIO". After removing everything I could find, I still get the message. Any suggestions?

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• Installing linux mint in one partition

  - by sha404

  So, I have a disk with a MBR setup(image below). I've managed to have 50 GB unallocated space for intalling Linux Mint 14. And I want to keep the current windows OS too(but don't want the Mint inside windows). Now I've seen in some tutorials that Linux Mint needs several partitions for bootloader, swap, & home. I don't like to have so many partitions & maybe MBR stuff won't let me create more than one now. So, is it possible to install Linux Mint in one partition only? If it is really impossible than what's the minimum number? & how can I accomplish that? Thanks in advance.

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• how're routing tables populated?

  - by Robbie Mckennie

  i've been reading "tcp/ip illustrated" and i started reading about ip forwarding. all about how you can receive a datagram and work out where to send it next based on the desination ip and your routing table. but what confused me is how (in a home network setting) the table itself is populated. is there a lower layer protocol at work here? does it come along with dhcp? or is it simply based on the ip address and netmask of each interface? i do know (from other books) that in the early days of ethernet one had to set up routing tables by hand, but i know i didn't do that.

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• Jumbo Frames on DIR-655

  - by Spookyone

  Hello, I am trying to set up jumbo frames on my gigabit home LAN but no luck so far. My setup is: D-Link DIR-655 router, HW Revision A3, Firmware 1.21 EU Synology DS107+, Firmware 3.0-1337 Laptop w/ Win7 x64, external PCIx NIC managed by "Generic Marvel Yukon 88E8053 based Ethernet Controller" The router is supposed to support jumbo frames but doesn't feature any relevant setting. I set the Jumbo Packet value to 9000 on both the NIC and the Synobox but it doesn't work, ping -f -l 8972 says "Packet needs to be fragmented but DF set". Is there any other setting I overlooked, the DIR-655 doesn't actually support jumbo frames, or what else could be the problem?

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