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  • How important is sender validation, and what matters?

    - by Charles Stewart
    When I started learning how to configure email, SPF existed but there were doubts about whether it was a good thing, and the value of offering SPF records in DNS. Now it seems that it is widely accepted that some form of well-known sender validation is good practice. Is this really true? Am I being a bad postmaster by not supporting SPF/DKIM/whatever?

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  • Is it worth while to learn Awk?

    - by user41755
    I am decent with bash scripting and I am catching on to regex, and a little sed usage. Is learning awk still worth while with all the alternatives out there. I am kind of averse to using perl, I see it as dying, for some reason I feel like bash is more of a survivor. Opinions?

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  • Software to capture the packets in an MPEG Transport Stream

    - by Crippledsmurf
    I have a DVB-T capture card and would like to capture the packets from the MPEG stream it receives so i can analyse them just for a bit of fun and learning I've googled and found a lot of converters and software to capture the video from these streams but very little in the area of capturing raw data from a stream. What software exists that can capture and dump the MPEG stream from a tuner?

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  • Win 2k3 - DNS query ?

    - by nXqd
    I'm learning about network and I configured DNS in 2k3. In forward zone : cntt.edu www.cntt.edu [ 192.168.188.4 ] . [ All IP / DNS configuration is right ] After that I use wireshark to catch packet when I enter www.cntt.edu in IE . I see there's no DNS here, I forward directly to 192.168.188.4, there's no query . Any problem ? Thanks for reading this :)

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  • update samba on ubuntu 8.04ltr

    - by Crash893
    I have had a few problems getting windows 7 pc's to join my samba domain. The reason I've gathered is because the samba server software is outdated. What is involved in updating to the newest 3.5.x from the version that comes with 8.04ltr are there any pitfalls i should know about. what about very detailed instructions (I'm still learning Linux in general)

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  • Putting Illustrator CS4 in fullscreen?

    - by thyrgle
    Hi, so I got this drawing tool from my good friend because he got a bigger and better one and I have the Adobe Suite CS4. But, I'm not a good drawer so I am interested in learning and I kind of want to turn Illustrator into a canvas that takes up the whole screen. In addition, I don't want the window to be shown at all. Is there any way to do this? Photoshop or another alternative works also works but I would prefer Illustrator.

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  • Free Software Simulators for SS7, ISDN, SIP, etc., Telecom Protocols.

    - by RBA
    Hi, I am learning Protocols where I have major use of Media Gateway Controllers, Media Gateway, PSTN N/w, VOIP N/w. Calls getting gatewayed from one node to another. Kindly help me in finding out some related software simulators where I can view pictorially the messages being exchanged between the various nodes in telecom architecture. Thanks

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  • How to connect InfoWindow II to 9406-250 console?

    - by Yvan JANSSENS
    How do I connect an InfoWindow II to the 9406-250 console? I recieved an old InfoWindow II (don't know the exact model number yet) from somebody, and want to connect to the console so I can do a manual IPL. I am totaly new to this, and I am still learning how to use everything. Here's the back of the 9406-250 with available connections: https://dl.dropbox.com/u/15854305/connectors.JPG What cabling do I need, and where can I order it?

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  • Does vim have the features to be used as an IDE?

    - by Kuroki Kaze
    I'm learning vim right now as I use it to quickly fix something in files on a server. Recently I've been thinking of switching from my IDE to vim, but I'm interested if all the features I need are in vim or if they can be added with plugins. I develop mainly in PHP and JavaScript. What I'm looking for is: Contextual help(point on function and see its arguments from oxygen docs) Code navigator(list of classes and functions in file to easily move between them)

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  • Storage and bandwidth for a social network

    - by user38141
    I guess i asked a dumb question earlier. I am fairly new at this. I have a socal network being built in PHP wit MYsql. I was wondering how much bandwidth and storage would allow users to have have 500mins of streaming video and allow them to store photos and videos. Please forgive me. I am not a technology guy and just doing some research as I am learning as I go along.

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  • visio alternatives

    - by Jason S
    I need an alternative to Visio for making diagrams (particularly signal processing block diagrams) that includes some kind of custom stencils + connection points. I just spent 2 hrs learning bits and pieces of Dia only to find that it has no rotational capabilities, not even 90 degree rotations. Otherwise it's great. Any suggestions?

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  • Sql Server Managmenet Studio Alternative - Are there any?

    - by JohnM2
    I am looking for lightweight MS SQL Server Managmenet Studio (2005) alternative (open source/freeware is a bonus). Something more like HeidiSQL for MySQL. LINQPad is not an option (although it's great for learning Linq). It can only query database (and has many cons for my needs). I am looking for management/alteration functionality also, not only making queries and viewing the results.

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  • Instructions per cycle?

    - by Matt Simmons
    I've been learning a little bit more about how processors work, but I haven't been able to find a straight answer about instructions per cycle. For instance, I was under the impression that a four core CPU could execute four instructions per cycle, so a four core CPU running at 2Ghz would execute 8 billion operations per second. Is this the case? I'm sure it's oversimplifying things, but if there's a guide or something else I can use to set myself straight, I'm definitely open to ideas.

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  • What presentation software suits my needs?

    - by claws
    Background: I'm teaching biology to 12th grade students. The syllabus I'm teaching is huge. I mean literally, very huge. There is a lot for students to remember. There are no less than 1000 facts (weird names, dates etc) for students to remember. They'll have to remember all of them, they don't have a choice. The notes I compiled for their learning itself is upto 80 printed pages(Just the bullet outline & facts). That's just one chapter. We have 34 chapters. Also my students are very hardworking, they study upto 8-10hrs per day (Yeah! we are from India :). So, I want to ensure maximum retaining by the students at each and every stage (Teaching & Learning). I'm trying to as many memory training techniques as possible. I'm trying to incorporate, mnemonics, strong visual aids (pictures, 3D-animations, real videos etc.), spaced repetition etc. I think MS powerpoint is not suitable for my needs: There are about 200 slides per chapter. Its very easy for students to get lost while teaching. Because the problem with powerpoint is that it gives facts (as bullets) but it doesn't exploit the association & organization (Concept Map) of the content, which helps students learn quickly. I found an amazing software called XMind. You can see the screenshot here. Problem is that it is not as powerpoint in terms of powerpoint. This software can be used for just for concept maps. In the above screenshot, each topic occupies a single slide. I have an Image/picture(Detailed huge picture) and about 5-10 bullet points and probably a video or an animation of somethings. And this XMind is not good at presenting, in terms that it doesn't allow me to set what to present after what. I want to present a top down view, with a slide for each topic. PS: I Don't like prezi.com. I tried but it simply is too confusing for my students. It zooms here and there. I didn't tried it but I've seen few presentations.

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  • Trying to find books

    - by robblot
    When I was learning Visual Basic.net 2008 I found a book that not only taught the basics but by the end of the book I had developed a fully working database application. Does anyone know where I might find a simular book but using Visual C++?

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  • List of good Inkscape tutorial

    - by marco.ragogna
    Inkscape seems to be a great open source software to draw and create vector graphics. Now, I would like to learn more how to use it and I would like to ask you to list here good tutorials and articles that helped you in learning Inkscape. Thank you

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  • Firewalls: What is the difference between Policy, NAT and Routes?

    - by Jakobud
    I'm learning fwbuilder and firewalls in general. I don't understand the differences between Policy, NAT and Routes. They all seem like they are just ways to tell the data where to go depending on what it is and where its coming from. What is the real difference? Is a properly configured firewall taking advantage of all three (Policy, NAT and Routes) or are they just three different ways to accomplish the same thing and you only need one of them?

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  • Looking for good Open Source email server

    - by rockinthesixstring
    I'm currently running MailEnable as my email server, it's ok but lacking. I'm looking for a better alternative and am wondering about Open Source. I'm a huge fan of the Smarter Mail, and will pay if it's the best I can get... But I have been learning that there is some good stuff out there in the Open Source community (IE: I've started using PFSense and I love it). Does anyone have any suggestions?

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  • How to maintain a SSD drive on Ubuntu ?

    - by Julien Nicoulaud
    I am running Ubuntu 10.04 on a Intel X25-M PostVille 160 Go SSD drive. How can I tell if there's something wrong ? What should/can I do to maintain its performance/health ? Should I use TRIM and how often ? This may look as a duplicate of this question, but I am more asking in term of good practices and learning how to use this new technology the right way...

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