Since you went to the trouble of blocking out your mac addresses you should also block out the qr code that also encodes the mac addresses. In this video tutorial, I've shown you How to Change MAC Address in Devices running on Windows 10, whether it is Laptop or Desktop, this method works with al.Obvious disclaimer: Using the information below to circumvent the license validation mechanism of a commercially licensed software product is almost certainly illegal in your city, state, nation, tribe, or religiously fundamental militia.sameBoatz. Enter Your MAC Address (00-11-22-33-44-55) - OR - Server. If your server has multiple MACs due to the presence of multiple NICs, enter the first (ETH0) MAC if possible. To activate your license please enter your Activation Code (s), enter your server's MAC Address or Serial Number and the information below, and then click 'Activate License'.Download Change MAC Address installer. During this operation, it is possible to select a different manufacturer or generate a completely random MAC address. With a few clicks, users will be able to change their MAC addresses. The serial number is identical to the products hardware address (MAC.With our program, you can now easily spoof the MAC address. The product is licensed on a per-machine basis, and you’re responsible for designing and implementing the license validation mechanism.Serial numbers for Axis network video, print and document servers generally start. Its not on the device or anywhere on the management screen that I Let’s say you’re a software developer putting the finishing touches on a product that’s due to go to market shortly.If you base your license validation mechanism on MAC addresses, you will face a stream, maybe even a flood, of requests by customers to associate a new MAC address with an existing license. When your customers replace an old VM with a new one, the new VM will, in all likelihood, have a different MAC address, and may have a different IP. One thing is certain: basing your license validation mechanism on the static properties of an inherently ephemeral, virtual machine will introduce you to a world of hurt. The VMs may be onsite, they may be hosted by a third-party service provider, or both. In all likelihood, your customers will run your product on x86 virtual machines rather than AIX appliances. It is 2015, and the concept of a machine has evolved from a static, hardware-based entity into an ephemeral, virtual one.
Change Address Serial Number And TheBut if I modify the eth0 entry in my /etc/network/interfaces file to the following:Eth0 Link encap:Ethernet HWaddr ea:04:89:05:02:58Inet6 addr: 2601:9:500:a0e:e804:89ff:fe05:258/64 Scope:GlobalInet6 addr: fe80::e804:89ff:fe05:258/64 Scope:LinkRX packets:4824 errors:0 dropped:0 overruns:0 frame:0TX packets:4147 errors:0 dropped:0 overruns:0 carrier:0RX bytes:3758601 (3.5 MiB) TX bytes:559613 (546.4 KiB)Now if I try to run your software, license validation will succeed. The eth0 interface has a MAC address of 43:87:35:96:2e:75 burned into it assuming no bugs in your code, your software will refuse to start when I run it on this machine. If your license validation routine checks for a static MAC address attached to a license, and I buy a license for MAC address ea:04:89:05:02:58, I would not be able to run your software on my Debian machine possessing the following network interfaces:Eth0 Link encap:Ethernet HWaddr 43:87:35:96:2e:75Inet addr:192.168.0.12 Bcast:192.168.0.255 Mask:255.255.255.0Inet6 addr: 2601:9:500:a0e:3e97:eff:fe9b:3e71/64 Scope:GlobalInet6 addr: fe80::3e97:eff:fe9b:3e71/64 Scope:LinkUP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1RX packets:521 errors:0 dropped:0 overruns:0 frame:0TX packets:541 errors:0 dropped:0 overruns:0 carrier:0RX bytes:205515 (200.6 KiB) TX bytes:72870 (71.1 KiB)RX packets:356 errors:0 dropped:0 overruns:0 frame:0TX packets:356 errors:0 dropped:0 overruns:0 carrier:0RX bytes:184321 (180.0 KiB) TX bytes:184321 (180.0 KiB)This machine has a single Ethernet interface with the usual loopback interface, about as simple as it gets. Pixma printer driver for macA MAC VLAN is conceptually layered atop an existing interface, and can have its own MAC address and IP address. Rather than override the MAC address on eth0 itself, I create a new MAC VLAN interface on my machine:# ip link add link eth0 address ea:04:89:05:02:58 vlan0 type macvlanI’ve named this new interface vlan0 and given it the MAC address that’s associated with the license I currently have. This isn’t a big deal if I’m required to do this on an infrequent basis, but if I have to do this often, it will introduce significant delays to my otherwise instant provisioning and configuration procedures.Not wanting to deal with the deterimental consequences to my own operations as a result of your inflexible license validation scheme, I go back to the technical drawing board. This likely forces me to wait a few hours at best and a day or more at worst. Thus, only one machine will ever be reachable at a time.Furthermore, some enterprise environments maintain a whitelist of MAC addresses and associated metadata although implementations of this whitelist and associated software vary, the point is usually to prevent any unknown NICs, or duplicate (spoofed) NICs, from ever achieving network connectivity.At this point, I could admit defeat, open a support case with you, and request that the license I bought have the associated MAC address changed. If I spin up multiple machines with the MAC address overridden in this fashion, and these machines are on the same network, the entry for ea:04:89:05:02:58 in the router’s MAC table will change continually as each machine sends frames across the network. The validation code has to be maintained, the licenses have to be generated and recorded, changes to the licenses have to be triaged by support personnel - but where are the benefits?Support doesn’t benefit, because there’s nothing to be gained from having paying customers submit their licenses with every SR. It is effectively pointless. Now, any application that queries for the system’s MAC address will be presented with the value ea:04:89:05:02:58, allowing me to use my current license on the machine without running into the problems caused by overriding the physical interface’s MAC address directly.I present the narrative above not from the adversial perspective of an illicit consumer, but as a software developer that fails to see the efficacy of a license validation mechanism that uses MAC addresses. After bringing the new interface up:Running ifconfig shows the newly added interface as follows:# ip route change 192.168.0.0/24 dev vlan0 proto kernel scope link src 192.168.0.20# ip route change 169.254.0.0/16 dev vlan0 scope link metric 1000# ip route change default via 192.168.0.1 dev vlan0A quick check of tcpdump -i vlan0 shows that traffic is now being routed through the interface successfully. Adopting such a licensing scheme eliminates all of the inconveniences of per-machine licensing for both provider and consumer, along with the temptation to employ technical circumventions such as the one detailed here. If licensing costs are to be tied to a metric, an auditable or puplicly disclosable value should be used, such as employee count, quarterly revenue, quarterly profit, etc. Add in the historically new ability to dynamically expand and contract environment footprints in terms of machines and data centers, and per-machine licensing becomes uneconomical and impractical.Per-machine licensing is indicative of short-sighted management, and leads to technical implementations like MAC address validation that completely fail to accomplish the goal of enforcing one license per machine in the first place.
0 Comments
Leave a Reply. |
AuthorJason ArchivesCategories |