CodeWithClarity

  Configuring VPC Network Peering Configuring VPC Network Peering VPC Network Peering in Google Cloud allows two VPC networks to communicate privately using internal IP addresses , without sending traffic over the public internet. Simple example Suppose you have: VPC-A VPC-B 10.10.0.0/16 10.20.0.0/16 │ │ VM-A ───── VPC Peering ───── VM-B 10.10.0.5 10.20.0.5 VM-A can communicate with VM-B using: 10.20.0.5 There is no need for an external/public IP for this communication. How it works Normally: VPC-A ❌ VPC-B They are isolated. After peering: VPC-A ←──── private connection ────→ VPC-B Routes are automatically exchanged between the peered VPC networks. Important points to remember Concept VPC Peering Communication Private Uses internal IPs ✅ Public internet required ❌ Same organization Not required Same project Not required Different projects ✅ Different organizations ✅ Autom...

GCP Networking — Logging & Traffic Analysis 1. What is Cloud Logging? Cloud Logging collects and stores logs generated by Google Cloud resources. In this section, the main focus is on: VPC Flow Logs Flow Analyzer Packet Mirroring Cloud NAT Logging Exporting logs to BigQuery Visualizing logs using Data Studio / Looker Studio Simple flow VM / VPC ↓ Traffic & Logs ↓ Cloud Logging ↓ BigQuery ↓ Data Studio / Looker Studio ↓ Reports & Dashboards 2. VPC Flow Logs What is it? VPC Flow Logs record sampled information about network traffic going to and from VM instances. Think of it as a network traffic diary . For example: VM-A 10.10.0.2 | | TCP traffic ↓ VM-B 10.50.0.2 VPC Flow Logs can tell you things such as: Who communicated with whom? Which port was used? Which protocol? How much data was transferred? When did the communication happen? Important VPC Flow Logs are enabled per subnet . If you enable Flow Logs on: Subnet-A then the VM instances inside tha...