Top "Dns" questions

How to overcome root domain CNAME restrictions?

We are hosting many web applications for our customers. As is obvious they want to use their own domains to …

networking dns rfc cname

How to redirect DNS to different ports

TL;DR: DNS resolution of a domain(s) must map to IP:port(s), instead of just IP. Example, sub1.…

networking dns minecraft

How to configure heroku application DNS to Godaddy Domain?

I have created a heroku application and wants to give domain to it from godaddy.com. I have configured all …

heroku dns

What is the difference between 127.0.0.1 and localhost

Assuming the following is defined in .../hosts: 127.0.0.1 localhost What, if any, are the actual differences between using 127.0.0.1 and localhost as …

sockets networking dns localhost

DNS caching in linux

I am confused about DNS caching. I am writing a small forward proxy server and want to use OS DNS …

linux networking operating-system dns

Using dig to search for SPF records

I am using dig installed on my machine to search for SPF records for a particular domain. Is there a …

dns dig

Nginx Different Domains on Same IP

I would like to host 2 different domains in the same server using nginx. I redirected both domains to this host …

nginx dns

Custom domain for GitHub project pages

I have a gh-pages branch in one of my http://github.com repos. The GitHub project pages works fine if …

github dns

Python lookup hostname from IP with 1 second timeout

How can I look up a hostname given an IP address? Furthermore, how can I specify a timeout in case …

python dns hostname nameservers

Get IPv4 addresses from Dns.GetHostEntry()

I've got some code here that works great on IPv4 machines, but on our build server (an IPv6) it fails. …

c# .net dns ipv6 ipv4