Running several name-based web sites on a single IP address.
- Post Link In Commentsmr. Mac's Virtual Existence Key
- Post Link In Commentsmr. Mac's Virtual Existence Address
Your server has multiple hostnames that resolve to a single address, and you want to respond differently for www.example.com
and www.example.org
.
Note
Creating virtual host configurations on your Apache server does not magically cause DNS entries to be created for those host names. You must have the names in DNS, resolving to your IP address, or nobody else will be able to see your web site. You can put entries in your hosts
file for local testing, but that will work only from the machine with those hosts
entries.
The asterisks match all addresses, so the main server serves no requests. Due to the fact that the virtual host with ServerName www.example.com
is first in the configuration file, it has the highest priority and can be seen as the default or primary server. That means that if a request is received that does not match one of the specified ServerName
directives, it will be served by this first .
The Mac famously doesn't come with a mouse or trackpad that has a distinct right mouse button, but that doesn't mean you can't right-click on the Mac. Whether you use the built-in trackpad on your Mac laptop, a Magic Trackpad, a Magic Mouse, or a third-party mouse that has a distinct right button (such as the Logitech MX Master 3 ), here's how. With no doubt, VirtualBox is perhaps the most popular tool for running macOS Virtual Machine. The problem is, running macOS on VirtualBox comes with its fair share of challenges and bottlenecks. This is often the case if the VirtualBox does not enjoy full CPU support or does not use a graphics card. Consequently, the whole.
The above configuration is what you will want to use in almost all name-based virtual hosting situations. The only thing that this configuration will not work for, in fact, is when you are serving different content based on differing IP addresses or ports.
- The solution is to determine the serial number of the real Mac by opening About This Mac or running System Information. It is an alphanumeric string. On my Mac Pro 5,1 it begins with a letter and is 11 characters long. In Terminal run the following command substituting the name of your VirtualBox virtual machine and your serial number (all one.
- The suit claims Mac Isaac's reputation was damaged by Twitter when the social media platform limited access to a link to the Post story, with the claim that the piece was suspected of being based on hacked content. Mac Isaac said he was authorized to examine and take possession of the hard drive when Biden did not take possession.
- In a virtual machine does not violate the EULA as long as. The VM is run on Apple hardware. From the EULA for Lion (iii) to install, use and run up to two (2) additional copies or instances of the Apple Software. Within virtual operating system environments on each Mac Computer you own or control that. Is already running the Apple Software.
Note
You may replace *
with a specific IP address on the system. Such virtual hosts will only be used for HTTP requests received on connection to the specified IP address.
However, it is additionally useful to use *
on systems where the IP address is not predictable - for example if you have a dynamic IP address with your ISP, and you are using some variety of dynamic DNS solution. Since *
matches any IP address, this configuration would work without changes whenever your IP address changes.
A couple weeks ago, our Network Operations team stumbled upon numerous MACs flapping on their Cisco switches. We began investigating where these MACs were in the data center as every switch stack in every row was seeing this issue. An example of what we saw is listed below:
10/24/2012 2:27:19 PM | appsw01-c8-gis-omaedc | Warning | 1622524: . Host 0021.5add.383d in vlan 700 is flapping between port Po9 and port Po8 |
10/24/2012 2:27:19 PM | appsw01-c8-gis-omaedc | Warning | 1622523: . Host 0025.b382.2561 in vlan 707 is flapping between port Po37 and port Po36 |
10/24/2012 2:27:19 PM | appsw01-c8-gis-omaedc | Warning | 1622520: . Host 0025.b382.2561 in vlan 425 is flapping between port Po37 and port Po36 |
10/24/2012 2:27:19 PM | appsw01-c8-gis-omaedc | Warning | 1622522: . Host 0025.b382.2561 in vlan 703 is flapping between port Po37 and port Po36 |
10/24/2012 2:27:19 PM | appsw01-c8-gis-omaedc | Warning | 1622521: . Host 0025.b382.2561 in vlan 450 is flapping between port Po37 and port Po36 |
After digging, we found that it was the stacking link MAC address on our Virtual Connect modules in our HP c7000 enclosures. Next, I had to determine if it was from every enclosure, 29 total, or only certain enclosures that had something in common. An email was sent to our HP Account Support Manager about the issue and if he had any prior experience. He mentioned he has seen instances relating to ESX servers, NIC drivers, or LLDP packets not handled correctly.
Through our investigation, enclosures without ESX servers were causing this issue. We doubted the NIC driver issue, since it was the stacking link. Our network team went down the LLDP route initially but it resulted in no change. We called HP support to go further and one of the engineers provided the following customer advisory. The description matched our issues as the one thing we noticed was that the enclosures with VC 3.15 (we are on our last month of VC upgrades to 3.60, just in time to start upgrades to 3.70!) were not causing the issues. The advisory indicates the Network Loop Protection setting was put into place in version 3.51 and affects later versions. The NLP frame being transmitted every five seconds was aligned with what we saw in the logs as well.
Post Link In Commentsmr. Mac's Virtual Existence Key
HP support could not comment on whether any pings would be lost when the setting was disabled. The description is a bit vague on that question but they, along with our Account Support Manager said it shouldn't but they didn't have first hand knowledge as to if it would cause any network disruption during the disable process. We scheduled a change time late at night.
Good news followed immediately. As soon as I applied the change, no pings were lost and our switch logs began clearing up. Days later, there is still no flapping seen and our switch CPU usage has dropped to normal levels. Unfortunately, it doesn't look like this issue is in the fixes under VC 3.70.