vault backup: 2026-01-05 14:26:17

2026-01-05 14:26:17 +08:00
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+
+Great! Since you're using `root`, there's no need to prepend commands with `sudo`. Here's how to configure `iptables` to allow all traffic on `10.194.64.0/24` without `sudo`:
+
+---
+
+### **1. Check Current iptables Rules**
+
+To inspect the current rules:
+
+```bash
+iptables -L -v -n
+```
+
+---
+
+### **2. Add Rules to Allow All Traffic on the Subnet**
+
+#### **2.1. Allow Incoming Traffic**
+
+```bash
+iptables -A INPUT -s 10.194.64.0/24 -j ACCEPT
+```
+
+#### **2.2. Allow Outgoing Traffic**
+
+```bash
+iptables -A OUTPUT -d 10.194.64.0/24 -j ACCEPT
+```
+
+#### **2.3. Allow Forwarded Traffic (if needed)**
+
+If this system acts as a router or forwards traffic:
+
+```bash
+iptables -A FORWARD -s 10.194.64.0/24 -j ACCEPT
+iptables -A FORWARD -d 10.194.64.0/24 -j ACCEPT
+```
+
+---
+
+### **3. Save the iptables Configuration**
+
+To persist these rules across reboots:
+
+#### **3.1. Save Rules (Legacy Method)**
+
+Use `iptables-save` to save the rules into a configuration file:
+
+```bash
+iptables-save > /etc/iptables/rules.v4
+```
+
+#### **3.2. For Systems Using `netfilter-persistent`**
+
+If `netfilter-persistent` is installed:
+
+```bash
+netfilter-persistent save
+```
+
+#### **3.3. For RHEL-Based Systems**
+
+If you're on a RHEL-based system:
+
+```bash
+service iptables save
+```
+
+---
+
+### **4. Verify Rules**
+
+To confirm the rules are applied:
+
+```bash
+iptables -L -v -n
+```
+
+---
+
+### **5. Optional: Test Connectivity**
+
+Test traffic to and from the `10.194.64.0/24` subnet:
+
+```bash
+ping 10.194.64.1
+```
+
+---
+
+### **6. Debugging (if needed)**
+
+If traffic is still blocked:
+
+- Look for conflicting `DROP` rules in the `INPUT`, `OUTPUT`, or `FORWARD` chains:
+    
+    ```bash
+    iptables -L -v -n
+    ```
+    
+- Ensure the system's network interface is properly configured.
+
+Let me know if you need help troubleshooting further or additional features like logging specific traffic!