Letters (except stressed à), Numbers 0-9 and Hyphen. http://en.wikipedia.org/wiki/Domain_name excerpt: Valid characters that can be used in a domain name are: a-z 0-9 – but not as a starting or ending character . as a separator for the textual portions of a domain name From https://www.rfc-editor.org/rfc/rfc1035 Various objects and parameters in the DNS have size … Read more
After more trial and error, the answer seems to be The Github custom domain should indeed be matrix.jeti.io I did not need the apex records. In fact, Github emailed me discouraging it. So I deleted the apex records. In OVH, I added a DNS CNAME entry like this: The thing that was confusing me is … Read more
Besides the fact that from a security standpoint it is a bit easier to isolate an app within a subdomain, I will just comment on what I think is the biggest difference between the two. Pro’s for subdomains: You can isolate configuration (for for example apache) per-domain. It will be easier to migrate parts of … Read more
*.vcap.me VMWare maintains this for their open cloud platform.
There are several ways to determine tenant on HTTP level: domain – tenant is determined by whole Host header sub-domain – sub-domain part of Host header, path based – path segment, usually by prefix host.com/tenantId/… cookie based – cookie value contains tenant id (good framework encrypts this!) user based – user session or some data … Read more
I think question is about to understand A & CNAME records deeply. I have also found this confusing but after reading couple of blogs, I came up with following understanding: The A and CNAME records are the two common ways to map a host name (name hereafter) to one or more IP address. Before going … Read more
cgi-bin historically was the only place where executable or script code (binaries, shell scripts, etc.) could be stored. It is mostly a historic relic since most hosts allow execution of scripts from anywhere.
It happens that /etc/hosts file doesn’t support wild card entries. You’ll have to use other services like dnsmasq. To enable it in dnsmasq, just edit dnsmasq.conf and add the following line: address=/example.com/127.0.0.1
A sub domain is part of the domain, it’s like subletting a room of an apartment. A records has to be setup on the DNS for the domain e.g mydomain.example has IP 123.456.789.999 and hosted with Godaddy. Now to get the sub domain anothersite.mydomain.example of which the site is actually on another server then login … Read more
There are a ton of good reasons to include it, the best of which is here: Yahoo Performance Best Practices Due to the dot rule with cookies, if you don’t have the ‘www.’ then you can’t set two-dot cookies or cross-subdomain cookies a la *.example.com. There are two pertinent impacts. First it means that any … Read more