Target machine receives ARP probe packets but not spoofed ARP response packets

I’m doing an ARP spoofing experiment in my local network, but I’ve encountered an issue. The target machine can successfully receive ARP probe packets (e.g., network discovery packets) sent from the attacking machine, but it does not recei… Continue reading Target machine receives ARP probe packets but not spoofed ARP response packets

How did I obtain a wildcard SSL certificate without port 80 opened for a challenge?

I wanted to secure my apps running in a private subnet with SSL. Albeit not necessary, it is very nice to have.
Because of my constant changes, I opted for a wildcard ssl certificate through my DNS provider Cloudflare by providing Nginx Pr… Continue reading How did I obtain a wildcard SSL certificate without port 80 opened for a challenge?

Does Vault (or basically any other system) require TLS when it only connects to a host on the LAN? [duplicate]

I’m trying to understand where TLS is required. I’ve heard that TLS encrypts data when a client communicates with a server through HTTP by verifying the server and passing encryption keys. This protection is done through a TLS certificate signed by a CA (Certificate Authority). I can imagine a hacker trying to claim who they are while communicating through the web.

But will this apply to a LAN system? For example, in Hashicorp’s Vault, they mentioned: “End-to-End TLS. Vault should always be used with TLS in production.”. If system A (say Vault) tries to communicate with system B (say Backend Service) connected through LAN how can the systems be verified through a CA? (or perhaps the question should be, does it need one?)

The image below helps illustrate the question I’m facing.
enter image description here

Reference:
https://www.cloudflare.com/learning/ssl/what-is-ssl/
What’s the point of certificates in SSL/TLS?
https://developer.hashicorp.com/vault/tutorials/operations/production-hardening

Continue reading Does Vault (or basically any other system) require TLS when it only connects to a host on the LAN? [duplicate]