Hello! I’m a newbie to DNS, and I was doing some research into the Dyn attack of October 2016 as a sort of learning case study. One thing that I noticed was that while Reddit was widely reported as being down, all the historical nameserver lookups I’ve done have AWS nameservers listed for reddit at … Read More “Dyn Attack Question!” »

DNS rookie here, I set up an AD domain as corp.domain.com on a windows server 2012r2 DC which I also want to use as DNS server. It created a forward lookup zone for the parent domain.com So the issue I have is that I can’t reach www.domain.com. How can I set this up correctly? I … Read More “External domain resolution” »

I recently implemented dmarc onto our Office365 environment. On occasion I see an email get blocked due to “dmarc=temperror” (error in processing during lookup of domain.example: DNS Timeout) Can anyone assist in troubleshooting this issue? Office365 with hybrid on-premise server DNS hosted by 3rd party TTL 1 hour, recommended by 3rd party submitted by /u/ItHurtzWhen-IP … Read More “DNS Timeout (dmarc)” »

I would just like a push in the right direction, as I am fairly new to networking.. especially DNS, and I did not create the original network. I think I’m going through a “is it dns? it cant be dns… its dns”. Basically, 10.0.0.0/24 -critical (works) 10.0.1.0/23 -clients (works) 10.0.2.0/24 -new subnet I can ping … Read More “Subnet wont translate FQDN or single-label names, sort-of works when using 8.8.8.8” »

Hello, I’m trying to make a local network for to make a phishing server so i can test my employees to see how IT mature they are. i have: 1 Windows 7 client 1 Mailserver (iRedMail) 1 DNS server (Bind9) 1 Phish server (Gophish) my dns server works fine within my linux devices but not … Read More “Help with records” »

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I want to start a research project regarding email domains. How would one script a query to gather all email domains that have mx records? (I know, crazy right?) I would pipe that script to a txt file and use it for the remaining part of my research. Appreciate the tips in advance! submitted by … Read More “Cumulative Email Domain Gathering” »

My SO purchased a domain through namecheap to redirect to her Etsy shop. I was able to set up the redirect easily, for when you type www.example.com it will go to www.etsy.example.com However, I am unsure how to get make example.com work. (So people don’t have to type in the www before it.) Is this … Read More “Removing www from in front of website (noob)” »

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