There are three commands in Linux to easily get a reverse DNS lookup with: dig, host and nslookup. Here are examples of each: shell> dig -x 3.214.2.238 +short
dscacheutil -flushcache System Preferences -> Network -> Advanced -> DNS -> Add 1.1.1.1, 8.8.4.4 and 8.8.8.8 at the top. If they are already there, CHANGE THE ORDER!
When you launch an instance into a VPC, AWS provides the instance with a public DNS hostname only if DNS hostnames are enabled for the VPC. By default, DNS hostnames are enabled only for default VPCs and VPCs that you create using the VPC wizard in the VPC console. If you enable DNS hostnames and […]
To see all the records in a domain, use the ANY keyword with the dig command: dig @your.dns.server. yourDomain.com. ANY Commands for full DNS zone transfer of a domain: nslookup -query=axfr domain server dig -t axfr domain @server host -t axfr domain server
Ran into an odd problem this morning on my Verio server. Was unable to get DNS resolution on either downloads.wordpress.org or akismet.com. I was able to get DNS resolution on both my home systems and the ICI servers. That meant that the issue was specific to Verio. I called them. I was disconnected before i […]
I had some odd issues with slow login via ssh to my host. I looked in Console.app, but was not able to find anything relevant. So here is what I did: 1. System Preferences -> Sharing, Unchecked “Remote Login” 2. In Terminal, as root, ran /usr/sbin/sshd -ddd -e (3 d’s for debug level 3, -e […]
Getting a lot done, just very busy today. Trying to keep everyone happy. I still have a slew of existing clients that require attention. Must finish the Dora domain registration cleanup today – it has been dragging for months. Finally got registry key info from them. Had to also clean up another client’s domain info. […]
erics, September 1st, 2021 
Categories: How-To's, Technology cli, Command, Command line, dig, dig -x, DNS, Host, howto, lookup, nslookup, Reverse, Reverse DNS, tips
| 
No comments 
