%title Blog Issue


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[[index.wiki|Index]] [[/home/tristan/Blog/blog/hello-world.wiki|Hello World]]
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*Date:* 2023/09/05

*Author:* Tristan Ancelet

= Blog Issue =
== DNS ==
Looks like my master DNS server was down for the last 3 days (didn't know until the teacher mentioned it). Had to end up taking a look at my provider and it looks like my master DNS server had crashed at some point. After restarting it I got everything started up and it seems to have come back up. 

I had a backup DNS server as well, but after looking into the VM (that was still running), it turns out that I never whitelisted the DNS port (53/udp) on it. So it's entire life has been failure (as it's been the backup for several months). My thought is that I *DID* whitelist it but not perminately. So after a reboot it cleared the config and DNS traffic wasn't whitelisted it anymore.

Here is the commands it did to whitelist DNS (running firewalld as a device side firewall)

{{{bash
firewall-cmd --perm --zone=public --add-service=dns
firewall-cmd --reload
}}}

After checking that DNS was resolving with dig, I was able to visit my site with no more issues.

{{{bash
dig blog.tristanancelet.com
}}}