Information about DNS and network
I am trying to understand why using different DNS gives different results. I have configured my computer to use 1.1.1.1 for DNS. When I visit app.smtp2go.com I get this site cannot be reached. But when I have configured it to use 8.8.8.8 it works fine. These are the results when I do a nslookup app.smtp2go.com … Read More “Why will using Google DNS work but using Cloudflare DNS not work for a website” »
Is this book still relevant? It’s the only book that I can find that seems worth reading. Can anyone suggest good DNS books for noobs? Thanks submitted by /u/TonyShasta_ [link] [comments] Powered by WPeMatico
Hi, I am a college senior studying computer science. I have a lot of background but no particular experience related to DNS. I am doing a fellowship and part of it is working with a client from a small business. His website is down and we’re trying to figure out why and how to get … Read More “Will this cause problems? (potential name server loop?)” »
Let me re-phrase my question: Does AWS “hosted zone” mean all validation records must be with AWS? Support at SiteGround insisted that, after pointing the NS to SiteGround, all DNS related activities should be done in the SiteGround’s. But adding SendGrid records at SiteGround doesn’t seem to be recognized by SendGrid–but the same records in … Read More “Please help with fix DNS errors (AWS, pointing to SiteGround)” »
I have a few recursive servers running Ubuntu 20.04 and pdns-recursor version 4.2.1. From about Feb 2023 there has been a sudden spike in memory usage on all these servers which require server reboots because restarting the service does not help. No configuration changes were made to cause this issue. I have tried to upgrade … Read More “pdns-recursor memory leak?” »
submitted by /u/elliottinvent [link] [comments] Powered by WPeMatico
Hello, everyone. First, I’d like to apologize if I am in the wrong subreddit. So my professor gave me these tasks: Install and configure a DHCP server and. a. Set subnet 192.168.20.0/24 b. Set the gateway to 192.168.20.1 c. Set IP reservation 192.168.20.20 for Ubuntu-Desktop client d. Set up the DHCP server to provide clients … Read More “Need help configuring BIND9.” »
submitted by /u/SafeDNS [link] [comments] Powered by WPeMatico
I currently have the TTL for www.example.com set as 14400. Is 14400 seconds too much or should I reduce it to 1 second? I am running my own name servers using Bind9 on HestiaCP control panel. submitted by /u/Allah19122022 [link] [comments] Powered by WPeMatico
I joined a team last year that has been using hosts files for a long time to work around DNS challenges. I’m hoping to move us away from using hosts files. We have a mix of Windows and Linux servers. Our company laptops are Windows. There are 5 zones I’m aware of that we need … Read More “No More Hosts Files” »