Does what it says, spits out basic data about an IP like whois info, ASN, rDNS hostname, etc. Can curl it for info about the IP of a box you’re on or can add any IP trailing the domain to get info about that.
Gives you the path a specific URL click is taking, shows you redirects/server response codes/headers along the way (click on each listed redirect for the full header output). Great for diagnosing little issues with a site or just find out when someone’s trying to shove you through a half dozen goo.gl shortcuts to hide affiliate links.
Makes your local dev site publicly assessable with a single click. While you can obviously do this on your own for free, I just love the service. It also works on 4G and it’s https without configuring anything.
I’ve been personally using BGPView, MXToolbox, and Godaddy’s whois server. This is all, seriously.
Other than that, I got a bunch of free / freemium software installed locally, such as WinSCP, Putty, Gyazo, etc.
You guys are giving me war flashbacks with that mxtoolbox talk
Here’s what I use a lot:
Sometimes I want to know what domain pointed to an IP on a certain date, or what IP a domain pointed to on a certain date. This is a huge help. The scenario is this: “I never used that server.” Well, your domain pointed to it on X day, and archive.org also shows it up that day so… yeah you kind of did. Which brings me to:
Historical context is key to so many investigations for abuse, complaint, discussion, whatever.
I want it all. I want to know what domains point to your IP, who your ISP is, who they peer with, everything. One-stop shop. One search.
I do a lot of Web Hosting work for clients, probably my 3 most used web-based tools are:
I use https://who.is/ for WHOIS lookups. I’m open to suggestions for a better one - it’s kind of filled with ads and stuff but it’s always been reliable and gives me all of the information I’m looking for. It also lets you manually refresh their WHOIS cache. Though, I probably use this site at least 2 dozen times a day so it’s almost muscle memory for me to Ctrl + T then type “who.is”.
For random IP info, I absolutely love http://ipalyzer.com/ and wish it was more popular. I think I found it a few years ago on reddit, and I’ve loved it so much I even donated a few bucks to the owners. It just makes IP lookups really easy - it covers a lot of really important stuff in a streamlined view with no ads.