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Abstract

ation was trying to delete a subnet that had deployed successfully, after the subnet was successfully deployed and a NACL got associated to it. Huh?<figure id="fb9e"><img src="https://cdn-images-1.readmedium.com/v2/resize:fit:800/1*V0hFMrw0yK-VmzOls_itsA.png"><figcaption></figcaption></figure>What I did is tried to create a second subnet and inadvertently gave the second subnet the same stack name. Because the parameters were different, CloudFormation tried to delete the subnet and create a new one but it couldn’t do the the reference to the SubnetAssociation stack.The real culprit was this typo which caused the second subnet I created to have the same “rttype” (not rttpye) and therefore the same name as the prior subnet:<figure id="62a7"><img src="https://cdn-images-1.readmedium.com/v2/resize:fit:800/1*qt1NyjkRq-T_37-6B6DNJg.png"><figcaption></figcaption></figure>Follow for updates.Teri Radichel | © <a href="https://2ndsightlab.com/?source=post_page---------------------------">2nd Sight Lab</a> 2023<div id="8b5f"><pre>About Teri Radichel:

⭐️ Author: Cybersecurity Books
⭐️ Presentations: Presentations by Teri Radichel
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⭐️ Recognition: SANS Award, AWS Security Hero, IANS Faculty
⭐️ Certifications: SANS ~ GSE 240
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🔒 Cybersecurity Speaker for Presentation</pre></div><div id="1e85"><pre>Follow <span class="hljs-keyword">for</span> more stories like <span class="hljs-keyword">this</span>:

❤️ Sign Up my Medium Email List ❤️ Twitter: @teriradichel ❤️ LinkedIn: https://www.linkedin.com/in/teriradichel ❤️ Mastodon: @teriradichel@infosec.exchange ❤️ Facebook: 2nd Sight Lab ❤️ YouTube: @2ndsightlab</pre></div><figure id="7286"><img src="https://cdn-images-1.readmedium.com/v2/resize:fit:800/1*4oxP4LXk8l8c3mpRvO7ejg.png"><figcaption></figcaption></figure></article></body>

CloudFormation Attempts to Delete a Subnet When A SubnetAssociation is Being Deployed

Confusing dependency issue ~ why was the subnet getting deleted in the first place?

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I had this issue where for some reason CloudFormation was trying to delete a subnet that had deployed successfully, after the subnet was successfully deployed and a NACL got associated to it. Huh?

What I did is tried to create a second subnet and inadvertently gave the second subnet the same stack name. Because the parameters were different, CloudFormation tried to delete the subnet and create a new one but it couldn’t do the the reference to the SubnetAssociation stack.

The real culprit was this typo which caused the second subnet I created to have the same “rttype” (not rttpye) and therefore the same name as the prior subnet:

Follow for updates.

About Teri Radichel:
~~~~~~~~~~~~~~~~~~~~
⭐️ Author: Cybersecurity Books
⭐️ Presentations: Presentations by Teri Radichel
⭐️ Recognition: SANS Award, AWS Security Hero, IANS Faculty
⭐️ Certifications: SANS ~ GSE 240
⭐️ Education: BA Business, Master of Software Engineering, Master of Infosec
⭐️ Company: Penetration Tests, Assessments, Phone Consulting ~ 2nd Sight Lab

Need Help With Cybersecurity, Cloud, or Application Security?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
🔒 Request a penetration test or security assessment
🔒 Schedule a consulting call
🔒 Cybersecurity Speaker for Presentation

Follow for more stories like this:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
❤️ Sign Up my Medium Email List
❤️ Twitter: @teriradichel
❤️ LinkedIn: https://www.linkedin.com/in/teriradichel
❤️ Mastodon: @teriradichel@infosec.exchange
❤️ Facebook: 2nd Sight Lab
❤️ YouTube: @2ndsightlab