Well, the Apache has to serve something when someone accesses it via https://websiteB.com. So it uses the content it has, from websiteA.
This is explained in detail in the Apache documentation, here a quote from it:
Apache automatically discriminates on the basis of the HTTP Host header supplied by the client whenever the most specific match for an IP ...
Have you actually measured the performance and found it degraded? You may actually find it's improved, although the difference may not be very large.
The Dell PowerVault MD3860i seems to be an active/passive (also known as asymmetric, or ALUA) style storage system: it has two storage controllers, and each of the disks are considered "owned by" one of the ...
I have made some checks.
Your private key is in a wrong format.
vsftpd expects it to be a PEM encoded PKCS#8 format private key.
You have it as PEM encoded PKCS#1 format private key. To convert it into the correct format, use the following commands:
openssl pkcs8 -topk8 -nocrypt -in wildcard.key -out wildcard_new.key
mv -f ...
Not certain, but I you need to do something with arp_filter, and/or maybe some of the other arp flags as well.
arp_filter - BOOLEAN
0 - (default) The kernel can respond to arp requests with addresses from other interfaces. This may seem wrong but it usually makes sense, ...
Yes, compiling a deb package is how you can install a single build to many hosts.
Many ways to distribute and install this package, including maintaining your own private apt repo.
If open source, yes you can create a public PPA and use that as your apt repo. Any distribution welcomes package maintainers.
I saw a link to Why is sendmail calling dns_getcanonname for domains of non-recipients in the To: header? in the sidebar and it turned out to have the solution. We needed to add FEATURE(nocanonify', canonify_hosts') in sendmail.mc and that appears to have stopped the additional lookups; the mail that was previously failing to be delivered has now gone ...
You've run squid with the wrong user, which created files with wrong permissions.
squid: ERROR: Could not read pid file
You need to run with sudo: sudo squid -z.
fatal: ipc::mem::segment::create failed to shm_open(/squid-cf__metadata.shm): 13 permission denied
You need to remove Squid's .shm files from /dev/shm or assign the right permissions.