64 lines
2.0 KiB
HTML
64 lines
2.0 KiB
HTML
|
<!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)
|
||
|
|
```bash
|
||
|
|
</p>
|
||
|
|
<ol>
|
||
|
|
<li>
|
||
|
|
Adding the DNS service to the public zone and reloading firewalld to make sure the config change takes
|
||
|
|
|
||
|
|
</ol>
|
||
|
|
<p>
|
||
|
|
firewall-cmd --perm --zone=public --add-service=dns
|
||
|
|
firewall-cmd --reload
|
||
|
|
```
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<p>
|
||
|
|
After checking that DNS was resolving with dig, I was able to visit my site with no more issues.
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<p>
|
||
|
|
```bash
|
||
|
|
dig blog.tristanancelet.com
|
||
|
|
```
|
||
|
|
</p>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|