Update docs/tech_docs/OpenWrt.md

docs/tech_docs/OpenWrt.md

@@ -1,3 +1,81 @@
+Here's an updated OpenWRT container configuration with a smaller footprint:
+
+### Proxmox Container Creation
+
+Use the following command to create a new container with reduced memory and storage:
+
+```bash
+pct create 101 /var/lib/vz/template/cache/openwrt-rootfs.tar.xz --unprivileged 1 --arch amd64 --ostype unmanaged --hostname openwrt-0 --storage local-lvm --memory 128 --swap 0 --rootfs local-lvm:2,size=1G \
+--net0 name=eth0,bridge=vmbr0,firewall=1 \
+--net1 name=eth1,bridge=vmbr1,firewall=1
+```
+
+Key changes:
+- Reduced memory to 128MB (`--memory 128`)
+- Disabled swap (`--swap 0`)
+- Reduced rootfs size to 1GB (`--rootfs local-lvm:2,size=1G`)
+
+### OpenWRT Firewall Configuration
+
+The network interface and firewall configuration remains the same as before:
+
+#### **Define Network Interfaces**:
+Update `/etc/config/network` to reflect `eth1` as the WAN interface:
+
+```bash
+config interface 'wan'
+    option ifname 'eth1'
+    option proto 'dhcp'
+```
+
+#### **Update Firewall Settings**:
+Append rules to `/etc/config/firewall` to allow SSH and HTTPS access:
+
+```bash
+config zone
+    option name 'wan'
+    list network 'wan'
+    option input 'REJECT'
+    option output 'ACCEPT'
+    option forward 'REJECT'
+    option masq '1'
+    option mtu_fix '1'
+
+config rule
+    option name 'Allow-SSH'
+    option src 'wan'
+    option proto 'tcp'
+    option dest_port '22'
+    option target 'ACCEPT'
+
+config rule
+    option name 'Allow-HTTPS'
+    option src 'wan'
+    option proto 'tcp'
+    option dest_port '443'
+    option target 'ACCEPT'
+```
+
+### Applying the Configuration
+
+After updating the configuration files:
+
+- **Restart Network Services**:
+  ```bash
+  /etc/init.d/network restart
+  ```
+
+- **Reload Firewall Settings**:
+  ```bash
+  /etc/init.d/firewall restart
+  ```
+
+This setup reduces the memory and storage footprint of the OpenWRT container while maintaining the necessary network and firewall configurations for SSH and HTTPS access.
+
+Remember to test connectivity and functionality thoroughly after applying these changes to ensure the reduced resource allocation meets your requirements.
+
+---
+
 To streamline your guide for setting up Proxmox containers with OpenWRT and configuring the necessary firewall rules for SSH and HTTPS access, here’s a refined and concise approach:
 
 ### Proxmox Container Creation