Oh GNS3! What would I do without you baby?

• Download Internet Explorer For Mac Os X Yosemite
• Internet Explorer For Mac Os X Yosemite
• Download Internet Explorer For Mac Os X Yosemite

Ha, GNS3 is like the poor network engineers friend. It’s also a boon to anyone studying for their Cisco certifications such as the CCNA or CCNP. I’ve been a CCNP for several years now and I wish I knew about GNS3. You can actually download a complete GNS3 workbench with built in labs specifically designed to help you earn your CCNA certification.

If OS X Yosemite came preinstalled on your new Mac, you’ll probably never need this article. In this article, you discover all you need to know to install or reinstall OS X, if you should have to. If you’re thinking about reinstalling because something has gone wrong with your Mac, know that an OS X reinstallation should be your last resort. OS X 10.10, aka Yosemite, sports a more modern look and bridges the gap between Apple's desktop and mobile devices. The new Continuity helps you hand off tasks from iPhone to iPad to Mac, but that. Sep 04, 2011 Run Internet Explorer 7, 8, 10, & 11 in Mac OS X the Easy & Free Way. This is achieved by using the freely available VirtualBox software from Oracle, and combining that with free Internet Explorer testing virtual machines from Microsoft, the trick is converting these free IE vm’s so that they work flawlessly under OS X (or Linux, technically), and that is all handled.

How crazy is that? There’s literally no need to purchase the physical Cisco hardware.

Back in my day, I used Dynanips (the hardware emulation engine that drives GNS3) but it was an arcane command line interface and no one really knew how to use it.

Today it’s all changed and man – I can tell you – it’s so much easier to setup.

GNS3 is the de-facto tool for testing and learning how network devices interact. You can setup a complete virtual lab using real Cisco IOS images all on virtual hardware.

And do you know what’s the best part?

The devices have no idea that they’re playing in your little sandbox. It’s 100% transparent. In other words, if you configure a layer 3 IP address on a link, the virtual appliance thinks you’re physically setting in a real server room with a physical console cable plugged into its console port.

But it gets even better.

You can actually add real operating systems like Windows XP, Windows 7 or Windows 8.1 and connect them to your virtual routers. Heck, you can even make your Host machine (the machine that GNS3 is installed on) join the party. Then you can setup DHCP servers and hand out IP addresses, you can setup ASA firewalls and play with access lists and even setup an FTP server and sign in a from a client PC while capturing the traffic.

The password will be in plaintext which will make you look like a super genius when you show it to your boss and explain how the organization should scrap the FTP server for SFTP.

Today I just want to show you how to download and install GNS3. In future tutorials we’ll dive into the delicious details but for now let’s start with the basics:

In this guide you’re going to:

• Install GNS3 in Mac OS X Yosemite
• Configure two Cisco routers
• Create a simple point to point link to confirm connectivity

You can use GNS3 to create an isolated network or you can even bridge it to your real physical network using your edge router as NAT/PAT translation device to the real world. It’s so cool because several years ago this wasn’t even possible.

But let me not get ahead of myself. First let’s grab and install GNS3.

Getting GNS3

GNS3 used to be gns3.net but it recently received a huge infusion of cash which it funneled into making a better product. If you’ve used GNS3 before, you’ll notice the new GNS3 (version 1.x) is faster and generally more pleasant to look at.

The first thing you need to do is signup.

Don’t worry – the guys at GNS3 won’t push you through a bunch of pervasive forms asking for your social security number, the name of your cat and why you broke up with your last girlfriend.

The signup form takes less than a minute to fill out even for slow typers.

Once you join, click Download and slurp down the DMG to your thirsty download folder.

Then just double click the DMG and drop it in your Applications list. (Command + Shift + a)

Gta 4 torrent download for pc. When you double click GNS3, the File Quarantine feature in your Mac will jump to the foreground, raise his hand and bark at you:

Are you sure you want to run this program? You grabbed it from the turbid waters of the internet! I’m going to compare it against a list of known Malware and then I’ll let you decided.

If you grabbed the installer from mediafire.com or some other sketchy file host like that I would click Cancel; otherwise, click Open. We yanked it directly from GNS3 so we don’t have anything to worry about.

Let’s start a new project and call it “My First Network”

Download Internet Explorer For Mac Os X Yosemite

Click OKand get ready to dance.

The first thing we need to do is get the real Cisco IOS images into GNS3. I suggest you setup a TFTP server on your Mac and then console into a real physical router. Then you can use:

show flash

to get the IOS flash version and

copy tftp flash <filename>

to upload the image to your Mac. Technically you need a valid Cisco SmartNET contract to download IOS images so you can talk to your boss and tell him what you’re trying to do or just grab a supported Cisco router and get started that way. I’m going to use my favorite: the 3725. (the image name is c3725-adventerprisek9-mz.124-15.T14.bin)

Once you have the file, in GNS3, press Command + , (that’s a comma) and go to IOS routers under Dynanips in the left pane and click the New button in the right pane.

Browse to the image and decompress it.

Back in the day, Cisco compressed all the images because flash memory was costly. This made sense but it also means you’ll need to wait for the image to deflate every time you fire up your router. Who has that kind of time? That’s why it’s prudent to click decompress now so you don’t have to wait later.

Click Next through the windows to pick your appliance name, platform, RAM allocations, network adapters and IDLE PC values. You can always change all this stuff later but Control clicking the router and choosing Configure.

Drag out two routers to the main area and then click the Add a link tool in the bottom left corner of the GNS3 window. The button looks like the profile view of a flat console cable with the plastic lip sticking up.

Let’s choose FastEthernet 0/0 for both routers. When you’re done connecting the dots, click the Add a link tool again to deselect it.

The red dots indicate that both interfaces are off. Click the Play button near the top of the window to startup both routers but then right click one and choose Idle-PC from the context menu.

This step is critical.

If you don’t set the Idle-PC value, your routers will eat your CPU down to the very last crumb.

Idle-PC tells GNS3 how to set the optimum CPU values for your router. Pick the one with the checkmark next to it.

Once you have that, double click each router to open the console windows and press Enter. If you fail to do that your CPU will go through the roof as the emulator waits around for your input.

Once you set the Idle-PC you don’t need to set it again and you don’t need to set it on each router you drag out. It’s a one time thing; however, you’ll need to press Enter in the console window of each connected device every time you start them up.

Double click the router to open the console window and then keep hitting enter until the router prompt appears.

Now we’re ready to rock. By the way, forgetting this mundane “Press enter” step can beat up your CPU.

Now let’s setup a simple point to point link and see if we can ping the other directly connected router. This is the simplest network I could think of. I just want you to get comfortable setting up GN3 so you can use it for bigger projects.

Let’s start with Router 1 (R1):

In the right pane of the window is your Topology Summary.

Before we configure an IP address on each directly connected interface we need to know which interface we’re connected to! That’s where the topology summary pane comes in handy. Expand each router and you’ll see the interface name and its connected peer.

So we can see R1 is connected to R2 via its FastEthernet 0/0 interface.

Alright so let’s dive in the console and configure an IP address on the 10.0.0.1 subnet using a slash 24 mask. In other words, each dotted decimal number in an IP address is actually 8 bits, so the slash 24 bit mask says, “Turn on the first 24 bits so we know the first 3 numbers in the IP Address belongs to the network ID and the last 8 bits belong to the host”.

So R1 is the first host with the name .1 on the 10.0.0 network.

Let’s do it.

The Cisco IOS allows abbreviations so config t is shorthand for “configure terminal”.

Once we get there, we can type “int fa0/0” which means “Get me into interface fa0/0”.

Then we set the IP address and mask and type “no shut” (short for no shutdown) to bring the interface up.

Now do the same thing for R2 except change the IP to 10.0.0.2.

After you have both interfaces turned up with IP addresses, type:

This will let you see all the layer 2 goodness that happens when we ping the other router.

Alright, are you ready for this?

Oh by the way, if you have Wireshark installed on your Mac, you can right click the interface in the topology summary view and choose Capture. Then you can really see what’s going on.

From R2 ping R1:

And lookie here!

You can actually see ARP going to work. You can see the ARP frame is sourced from 10.0.0.2 with MAC address c202.1e04.000 and the destination is 10.0.0.1 with MAC address 0000.0000.0000.

Why all the zeros?

Because ARP (the Address Resolution Protocol) is saying

Yo! Everyone in the 10.0.0 network listen up. I’ve got to get something to some device with IP address 10.0.0.1. What’s his MAC address?

The 0000.0000.0000 is just the broadcast address; meaning, the ARP request is sent to every host in on the local subnet.

10.0.0.1 sees the ARP request and replies with his MAC c201.1dfe.0000 and the the ping request passes.

It’s kind of hard to see in the output but you may notice a dot followed by four exclamation points near the end of the last ARP debug output. That first dot (.) the period, means the ICMP request failed for the first time.

Why?

Because TCP/IP was using ARP to figure out how to find 10.0.0.1. If you’re a little confused about why we need both IP addresses and MAC addresses you should check out the article I published on that.

Anyway, I hope this helped you!

Internet Explorer For Mac Os X Yosemite

If OS X Yosemite came preinstalled on your new Mac, you’ll probably never need this article. In this article, you discover all you need to know to install or reinstall OS X, if you should have to.

If you’re thinking about reinstalling because something has gone wrong with your Mac, know that an OS X reinstallation should be your last resort. If nothing else fixes your Mac, reinstalling OS X could well be your final option before invasive surgery (that is, trundling your Mac to a repair shop).

Download Internet Explorer For Mac Os X Yosemite

You don’t want to reinstall OS X if something easier can correct the problem. So if you have to do a reinstallation, realize that this is more or less your last hope (this side of the dreaded screwdriver, anyway).

Reinstalling is a hassle because although you won’t lose the contents of your Home folder, applications you’ve installed, or the stuff in your Documents folder (unless something goes horribly wrong or you have to reformat your hard drive), you might lose the settings for some System Preferences, which means you’ll have to manually reconfigure those panes after you reinstall. And you might have to reinstall drivers for third-party hardware such as mice, keyboards, printers, tablets, and the like. Finally, you might have to reregister or reinstall some of your software.

It’s not the end of the world, but it’s almost always inconvenient. That said, reinstalling OS X almost always corrects all but the most horrifying and malignant of problems. The process in Yosemite is (compared with root-canal work, income taxes, or previous versions of OS X) relatively painless.

How to install (or reinstall) OS X

In theory, you should have to install Yosemite only once, or never if your Mac came with Yosemite preinstalled. And in a perfect world, that would be the case. But you might find occasion to install, reinstall, or use it to upgrade, such as

• If your Mac is currently running any version of OS X except Yosemite

• If you have a catastrophic hard-drive crash that requires you to initialize (format) or replace your boot drive

• If you buy an external hard drive and want it to be capable of being your Mac’s startup disk (that is, a bootable disk)

• If you replace your internal hard drive with a larger, faster, or solid state drive

• If any essential OS X files become damaged or corrupted or are deleted or renamed

The following instructions do triple duty: Of course they’re what you do to install OS X for the first time on a Mac or a freshly formatted hard or solid-state disk. But they’re also what you do if something really bad happens to the copy of OS X that you boot your Mac from, or if the version of OS X on your Mac is earlier than 10.10 Yosemite. In other words, these instructions describe the process for installing, reinstalling, or upgrading OS X Yosemite.

If you’ve never had Yosemite on this Mac, the first thing to do is visit the Mac App Store, download Yosemite, and install it. Once you’ve done that, here’s how to install, reinstall, or upgrade Yosemite, step by step:

1. Boot from your Recovery HD partition by restarting your Mac while holding down the Command+R keys.

   The OS X Utilities window appears. Select Reinstall OS X, and click Continue. The OS X Yosemite splash screen appears. Click Continue.

   A sheet appears informing you that your computer’s eligibility needs to be verified by Apple. Click Continue to begin the process of installing or reinstalling OS X.

   If you’re not connected to the Internet, you’ll be asked to choose a Wi-Fi network from the AirPort menu in the top-right corner.

2. The Yosemite software license agreement screen appears. Read it and click Agree.

   A sheet drops down, asking whether you agree to the terms of the license agreement. Yes, you did just click Agree; this time you’re being asked to confirm that you indeed clicked the Agree button.

   If you don’t click Agree, you can’t go any farther.

3. Choose the disk on which you want to reinstall OS X by clicking its icon once in the pane where you select a disk.

   If only one suitable disk is available, you won’t have to choose; it will be selected for you automatically.

4. Click the Install button.

5. A sheet asks for your Apple ID and password. Type them in the appropriate fields; click Sign In, and your Yosemite installation (or reinstallation) begins.

   The operating system takes 30 to 60 minutes to install, so now might be a good time to take a coffee break. When the install is finished, your Mac restarts itself.

If you were reinstalling Yosemite on the hard disk that it was originally installed on, or upgrading from Mavericks, you’re done now. Your Mac will reboot, and in a few moments you can begin using your new, freshly installed (and ideally trouble-free) copy of OS X Yosemite.

If, on the other hand, you’re installing Yosemite on a hard disk for the first time, you still have one last step to complete. After your Mac reboots, the Setup Assistant window appears. You need to work your way through the Setup Assistant’s screens as described below.

Getting set up with the Setup Assistant

Assuming that your installation process goes well and your Mac restarts itself, the next thing you should see (and hear) is a short, colorful movie that ends by transforming into the first Setup Assistant screen (Apple Assistants such as this are like wizards in Windows, only smarter), fetchingly named Welcome.

To tiptoe through the Setup Assistant, follow these steps:

1. When the Welcome screen appears, choose your country from the list by clicking it once, and then click the Continue button.

   If your country doesn’t appear in the list, select the Show All check box, which causes a bunch of additional countries to appear.

   After you click Continue, the Select Your Keyboard screen appears.

2. Choose a keyboard layout from the list by clicking it once; then click Continue.

   If you want to use a U.S. keyboard setup, click the U.S. listing. If you prefer a different country’s keyboard layout, select the Show All check box, and a bunch of additional countries’ keyboards (as well as a pair of Dvorak keyboard layouts) appear in the list. Choose the one you prefer by clicking it — and then click Continue.

   The Select Your Wi-Fi Network screen appears.

3. Click the name of the wireless network you use to connect to the Internet, type in its password, and then click Continue.

   If you don’t see the network you want to use, click Rescan. If you don’t use a wireless network, click Other Network Setup, and then choose one of the available options, or choose My Computer Does Not Connect to the Internet. Click Continue.

   The Migration Assistant (also known as the Transfer Information to This Mac) screen appears.

4. Choose to transfer data, then click Continue, or choose not to transfer data, then click Continue.

   If this is a brand-new Mac or you’re installing OS X Yosemite on a Mac and have another Mac or Time Machine backup disk nearby, you can transfer all of your important files and settings by following the onscreen instructions and connecting the new and old Macs via FireWire or Ethernet cable.

   Transferring data can take hours — that’s the bad news.

   The good news is that once the data transfer finishes, you’re finished, too. In other words, you can ignore the steps that follow (which are only for brand new installations with no data to transfer).

   Goodbye and good luck.

   Assuming you chose not to transfer data, the Sign In With Your Apple ID screen appears.

5. If you want to use your Apple ID with this Mac, type it (such as tcook@me.com) and your password in the appropriate fields, and then click Continue. Or, if you don’t have an Apple ID or prefer not to use one with this Mac, click Don’t Sign In, and then click Continue.

   To learn more about getting an Apple ID, click the blue “Learn More” link. In a nutshell, it lets you make one-click purchases at the iTunes Store, iPhoto, or the Apple Store, and includes free iCloud membership.

   The Allow iCloud to Use the Location of This Mac for Find My Mac sheet appears.

6. Click Allow or Not Now.

   The Terms and Conditions screen appears.

7. Read the Terms and Conditions and click Agree. A dialog confirms your agreement. Click Agree again.

   The Create A Computer Account screen appears.

8. Fill in the Full Name, Account Name (sometimes called Short Name), Password, Verify Password, and Hint fields, and then click Continue. Or, check the Use my iCloud Account to Log In checkbox. Then fill in the Account Name (sometimes called Short Name), and click Continue.

   This first account that you create will automatically have administrator privileges for this Mac. You can’t easily delete or change the name you choose for this account, so think it through before you click Continue.

   You can’t click the Continue button until you’ve filled in the first two fields. Because a password is optional, you can choose to leave both password fields blank if you like. If you do, your Mac warns you that without a password, your Mac won’t be secure. If that’s okay, click OK. If you change your mind and want to have a password, click Cancel.

   Click on the little picture to the right of your name (it’s labeled “edit”) if you want to choose a different picture or take a picture of yourself with your Mac’s built-in camera.

   If you choose to take a picture, click the Take Photo Snapshot button. When the picture appears, you can change its size by using the slider control directly below the image and/or move it around in the frame by clicking your face and dragging. If you’re not happy with this snapshot, click Retake a Video Snapshot. When you’re happy with it, click Continue.

   If you choose to select a picture from the Picture library, click the picture you want to represent you — the butterfly, dog, parrot, flower, or whatever — and then click Continue.

   The iCloud Keychain screen appears.

9. Click Set Up iCloud Keychain or Set Up Later.

   If you choose Set Up iCloud Keychain, a screen requesting your passcode appears. Type your four digit passcode, and click Continue.

   If you’ve forgotten your passcode or don’t have one, click Forgot Code to reset iCloud Keychain.

   In either case, a verification code is sent to your iPhone or other Apple device; type it in, and click Continue.

   The OS X Finder’s Desktop appears.

And that’s all there is to it. You’re done.