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<a href="index.html">Index</a> <a href="home/tristan/Blog/blog/hello-world.html">Hello World</a>
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<p>
<span id="-Date:"></span><strong id="Date:">Date:</strong> 2023/09/05
</p>

<p>
<span id="-Author:"></span><strong id="Author:">Author:</strong> Tristan Ancelet
</p>

<div id="Blog Issue"><h1 id="Blog Issue" class="header"><a href="#Blog Issue">Blog Issue</a></h1></div>
<div id="Blog Issue-DNS"><h2 id="DNS" class="header"><a href="#Blog Issue-DNS">DNS</a></h2></div>
<p>
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. 
</p>

<p>
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 <span id="Blog Issue-DNS-DID"></span><strong id="DID">DID</strong> whitelist it but not perminately. So after a reboot it cleared the config and DNS traffic wasn't whitelisted it anymore.
</p>

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

<pre bash>
    firewall-cmd --perm --zone=public --add-service=dns
    
    firewall-cmd --reload
</pre>

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

<pre bash>
    dig blog.tristanancelet.com
</pre>

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Added new post 2023-09-06 02:24:55 +00:00			`<!DOCTYPE html>`
			`<html>`
			`<head>`
			`<link rel="Stylesheet" type="text/css" href="style.css">`
			`<title>Blog Issue</title>`
			`<meta http-equiv="Content-Type" content="text/html; charset=utf-8">`
			`<meta name="viewport" content="width=device-width, initial-scale=1">`
			`</head>`
			`<body>`



			`<hr />`
			`<p>`
			`<a href="index.html">Index</a> <a href="home/tristan/Blog/blog/hello-world.html">Hello World</a>`
			`<hr />`
			`</p>`

			`<p>`
			`<span id="-Date:"></span><strong id="Date:">Date:</strong> 2023/09/05`
			`</p>`

			`<p>`
			`<span id="-Author:"></span><strong id="Author:">Author:</strong> Tristan Ancelet`
			`</p>`

			`<div id="Blog Issue"><h1 id="Blog Issue" class="header"><a href="#Blog Issue">Blog Issue</a></h1></div>`
			`<div id="Blog Issue-DNS"><h2 id="DNS" class="header"><a href="#Blog Issue-DNS">DNS</a></h2></div>`
			`<p>`
			`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.`
			`</p>`

			`<p>`
			`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 <span id="Blog Issue-DNS-DID"></span><strong id="DID">DID</strong> whitelist it but not perminately. So after a reboot it cleared the config and DNS traffic wasn't whitelisted it anymore.`
			`</p>`

			`<p>`
			`Here is the commands it did to whitelist DNS (running firewalld as a device side firewall)`
			`</p>`
Added new post 2023-09-06 02:31:11 +00:00
			`<pre bash>`
			`firewall-cmd --perm --zone=public --add-service=dns`

			`firewall-cmd --reload`
			`</pre>`
Added new post 2023-09-06 02:24:55 +00:00
			`<p>`
			`After checking that DNS was resolving with dig, I was able to visit my site with no more issues.`
			`</p>`
Added new post 2023-09-06 02:31:11 +00:00
			`<pre bash>`
			`dig blog.tristanancelet.com`
			`</pre>`
Added new post 2023-09-06 02:24:55 +00:00
			`</body>`
			`</html>`