MAC addresses are important. I want to ping that device. How do I do that? I use the ARP process. But we have an intervening network device here. The Layer 2 switch passively learns MAC addresses by listening. It will have learned the MAC addresses of these two endpoints. If by some chance both of these machines claim to have duplicate MAC addresses, the switch will not know what to do with that traffic. In fact, if I added a router to this picture.
How far reaching is the MAC address? That is, when does it cease to have network meaning? That is the extent of the network. This packet is flying through the network. These are like hops. This interface has a MAC address on it.
It turns out if you follow this, the source of this information SIP is that guy in his house. That never changes. All the way along this hop, by hop, by hop process, the MAC addresses, they do change. The destination MAC address is that one.
Bottom line answer, how far reaching is a MAC address, is it only matters at Layer 2. No, neither does he care. In this video, you will gain an understanding of Agile and Scrum Master Certification terminologies and concepts to help you make better decisions in your Project Management capabilities. How does an investigator hunt down and identify unknown malware? Save my name, email, and website in this browser for the next time I comment.
Subscribe to this author's posts feed via RSS.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. On hardware where these properties are not set, the generation of a persistent MAC address will fail.
What do you think, teg? Do you think this makes sense? I see the problem. But not sure I follow the patch. I guess what we want is in case the name of a device is set explicitly i. Does that make sense? So when it returns falsewe assume that the name can be used to seed the persistent MAC.
For example, bond0 that is created by default when the bonding module is loaded. I assume that's what we want though? Is there a reason the proposed fix hasn't been applied? This is blocking OpenVPN being able to bridge in some configurations. I made the patch, and confirmed it is working for a bridge device. Is there any problem on this solution?
Please grafi-ttcan you share your patch? Any update on this matter?
This also seems to cause issues for me in systemd v when using LXC:. A patch or workaround, maybe from grafi-ttwould be greatly appreciated as I am stuck right now. I am not really sure it is the right way to address the issue though. As I said, virtual device that is not exactly created by user will still make udev error out.
I wonder if we need to by some means make udev actually ignore them when it applies the MACAddressPolicy in any case, so that this issue is fully addressed. I mean, what's the sense of having systemd-wide i.When presented with the recovery options, you might need to enter your password first if you use FileVault encryption click Utilities at the top and choose Terminal 3.
Type; csrutil disable 4. Reboot as normal. Once back onto your desktop, download the telnet and ftp files -from here- and extract them to your downloads folder. Next, open a terminal and type. When presented with the recovery options, click Utilities at the top and choose Terminal Type; csrutil enable Et Voila!
EVE-NG should be back and working as normal, and your command line tools have been restored. I cannot freaking type anything on my terminal after the below message, so step 6 is not possible for me. Any workaround? All step 6 is doing is copying the files from the downloads folder into the directory — you can use finder to do the same thing. Wasted 6hrs to get to this page. Thank You very much for sharing this.
Thanks again for the effort to put this online. It stopped working again after upgrading to catalina on MAC OS and now it keeps saying it tried doing the filesystem is read only mode. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment.
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How to set up the UNetLab or EVE-NG network emulator on a Linux system
Skip to content. Great post! Man, thanks a lot and good job 5 August Reply. Thanks, worked flawlessly, Awesome! Thank You 6 October Reply. How can I do? Thanks a lot, this article helped me. Now everything looks good and works perfect like 19 November Reply.
Kofi Ghana. Finally a workaround that works!!!Open-Source Routing and Network Simulation. UNetLab is the current, stable version of the network emulator and EVE-NG is an updated version of the same tool, available as an alpha release. Its graphical user interface runs in a web browser.
The procedure is the same for UNetLab. EVE-NG is a clientless network emulator that provides a user interface via a browser. Users may create network nodes from a library of templates, connect them together, and configure them. Advanced users or administrators may add software images to the library and build custom templates to support almost any network scenario. EVE-NG supports pre-configured multiple hypervisors on one virtual machine. They are also developing an EVE-Cloud hosted solution that I assume will allow users to pay for access in exchange for a hosted solution on a remote cloud server.
However, the developers have stopped developing UNetLab. As a first step, we will install applications that EVE-NG uses when interacting with nodes and we will integrate new protocol handlers into the Internet browser.
In this case, I am using Firefox but this procedure should support other browsers, also. To install the script, execute the following commands in a terminal window on your Linux computer:. The script installs telnet, wireshark, and a VNC viewer. It also configures the new protocol handlers. This nested virtualization setup is not supported by VirtualBox — my usual VM manager. In this example, we download the file VMware-Player The VMware install wizard will start. Accept the license terms and follow the prompts to install VMware.
When you get to the license window, select the button that you agree to use VMware Player for only non-commercial use.Do not expand current HDD. Follow the guide to the link below. A: For backup EVE content copy following folders:. A: from the EVE cli type:. It usually solves automatically in 15 minutes.
You must be able to ping named ping, like: ping www. After mins check License with with fix permissions command:. A: Usually it can be 2 issues. To check if HDD is not overloaded, please issue command:. Same could happen if you had used suspend VM. To fix SQL database issue cli command:. Take note of the path of the file system from the above image and shown below. Your root file system name will probably be different, so use the information displayed on your system, which is used in the next command.
Use the fsck command with the file system path determined above. This is in the following format. Finally enter the reboot command at the initramfs command prompt. Q: Why Qemu nodes are slow on my I7 64G ram? Avoid using AV on Vmware binary. Is an upgrade possible? A: No. What to do? Q: How to fix permissions? A: Run bellow command from cli. A: Add a network object to the lab topology and connect multiple nodes to it. A: Correct, if lab was created before version v2.
Solution to keep your configurations: The best way if you have exported those configuration using export cfg feature. Q: Which ports I must open on Firewall to grant telnet access from remote connection? Of course you have to be sure open ports 80 if you use SSL and To force EVE Pro license validations please do: 1.
Q: How to upgrade my EVE?I really like EVE-NG, for proof of concept work, testing, and just learning new products I cant think of any product better. Note : You can probably skip down to allowing promiscuous mode below.
Above you can see the original eth0, and the one I just added eth1. But just in case, run the following command. Repeat for any additional network cards. By default VMWare will block that.
Above, if you remember the vNIC eth1 was bridged to pnet1. These used to be labelled pnet1, pnet2, etc. Now they are labelled Cloud1, Cloud2, etc. Select Cloud1 remember this is mapped to pnet1, which is bridged to eth1. For your information, I use vlan tagging on my home lab. For more information, see interfaces 5.
Cloud devices iface eth1 inet manual auto pnet1 iface pnet1 inet static address Screenshots you have added, it is for the vSphere web client. I am not sure how to enable promiscuous mode on VMware Workstation. There is no vSwitch concept in VMware Workstation, you enable it directly on a vmic on the machine, by editing the vmx file. Thanks so much about this answer, I keep fighting with the problem until I found this message.
Maybe it would be useful to put in the tutorial the commentary to avoid this issues. Thanks a lot. Thanks for this post. I set up my Lab on ESX today and have been troubleshooting this particular problem since install complete.
Enable Promiscuous mode worked for me.
EVE-NG (VMware) Connecting to the Internet
Your email address will not be published. Thank you! This post saved me some time and nerve!EVE-NG Client Pack:
Post a Reply. HI, Thanks a lot for this post, very helpful. Thanks Post a Reply. This was a lifesaver, thanks! Thank you very much, sir!Remotely accessing a Mac is designed to be easy. Apple has spent a lot of time ensuring anyone can log in to their Macs — both desktop and laptop — from any other Mac device, anywhere.
And, besides, there are a variety of third-party apps ready to help with that too. Still, remotely managing their Mac sounds overly complicated to a lot of people.
From how you connect to sharing files or screens to using your Apple device as a remote mouse, we want to demystify the process in the easy-to-follow guide below. There're two ways: you can allow remote login to your Mac from another computer, or allow others to access your computer using Remote Desktop it's available from the App Store. You can either select All Users, which means any other device on your network, or any Mac you own, can access and connect, or click the plus sign to pick the exact users.
When you want to remotely log in to your Mac from another device, you need to know your username the name that appears when you login and your computer's IP address. Write them down and keep them safe, as allowing access to your Mac does make it potentially less secure, especially over cellular or public Wi-Fi networks.
Accessing, controlling, or viewing information on your Mac can be done with a built-in Terminal or any other SSH app using your username and IP address. Collaboration has become of utmost importance to today's workplaces. And with more and more people working remotely, being on the same screen ahem, page is a must.
Screens allows you to work remotely with any computer regardless of your location. Whether you are on a business trip or traveling, stay confident knowing you can access any file on your home computer at any time. To start using Screens, get the app from Setapp and configure the following:. Today we have plenty of ways to send and share files.
But ask someone to send something, and you are likely to get it through email. Due to the ubiquitousness of email, it's still the default method for file sharing, despite its obvious flaws and constraints. Few people know that their Mac has native file sharing functionality built in. If you only want to share specific folders, add them to the Shared Folders list. If you only want specific users to access the folder, add them to its Users list.
Otherwise, everyone will be able to access it.