You can look up the name servers associated with a domain name using either “whois” or “dig NS”. In some rare occasions, I have gotten back two different answers using these two techniques. In my experience, “dig NS” is the more trustworthy of the two.
I’ve started compiling a list of name server domain names and the companies associated with them. This list has been helpful in guiding clients to the correct company to contact when modifying DNS records. You can determine your clients’ name servers by using a command line utility like whois or dig (e.g. whois salferrarello.com or […]
Historically, I used ipfw from the command line to do port forwarding on my Mac. Unfortunately, as of Yosemite OS X 10.10 ipfw has been removed. (In all fairness, ipfw has been deprecated for some time but I continued using it because it was way easier than pfctl on the command line). Command Line pfctl […]
Net neutrality is a fundamental principal of the Internet and should be defended. ISPs herding users to sites of their choosing is a gross abuse of their power. My ISP is a pipe of information delivered to my home. I pay for a pipe that is capable of carrying a certain amount of bandwidth each […]
dig is command line DNS Lookup program pre-installed on *nix and Macs. If you don’t have access to dig from the command line, there are some websites that offer a web interface to dig (e.g. Google Toolbox’s Online Dig). Basic Lookup (Similar to ping) dig example.com Advantages over ping: Doesn’t get grumpy when you include […]
Find Your Local IP Address on Your Mac ipconfig getifaddr en0 (primary) or ipconfig getifaddr en1 (secondary) How do I know which to use? It is common for Mac laptops to have one (wireless only) or two (wired and wireless) network connections. When a wired connection is present, it is the primary connection (with wireless […]