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@@ -7,6 +7,7 @@ RUN apt-get update && apt-get install -y \
     iproute2 \
     net-tools \
     curl \
+    sudo \
     && rm -rf /var/lib/apt/lists/*
 
 # Configure SSH
@@ -18,11 +19,6 @@ RUN useradd -m -s /bin/bash tunneluser
 
 WORKDIR /app
 
-RUN chmod -R 777 /app
-
-# Ensure the app runs as the same user as the Space UI
-
-
 COPY . /app
 
 RUN chmod +x entrypoint.sh

entrypoint.sh

@@ -16,7 +16,7 @@ fi
 echo "Detected public IP: $PUBLIC_IP"
 
 # Configure SSH server
-sudo  /app/ssh-config/sshd_config /etc/ssh/sshd_config
+sudo cp /app/ssh-config/sshd_config /etc/ssh/sshd_config
 chmod 600 /etc/ssh/sshd_config
 
 # Generate SSH host keys if they don't exist
@@ -30,7 +30,7 @@ fi
 echo "SSH server started."
 
 # Configure Dante SOCKS5 server
-sudo  /app/socks5-config/danted.conf /etc/danted.conf
+sudo cp /app/socks5-config/danted.conf /etc/danted.conf
 chmod 644 /etc/danted.conf
 
 # Start Dante SOCKS5 server

huggingface_fixes.md

@@ -0,0 +1,73 @@
+# Hugging Face Environment Fixes
+
+## Issues Encountered and Resolutions
+
+### 1. Read-only File System Error for IP Forwarding
+
+**Error:**
+```
+./entrypoint.sh: line 8: /proc/sys/net/ipv4/ip_forward: Read-only file system
+```
+
+**Root Cause:** 
+In containerized environments like Hugging Face Spaces, the `/proc` filesystem might be mounted as read-only for security reasons, preventing direct writes to system parameters.
+
+**Resolution:**
+- Commented out the direct write to `/proc/sys/net/ipv4/ip_forward` in `entrypoint.sh`
+- Removed `sysctl` commands from the Dockerfile
+- Rely on Docker's default networking capabilities for IP forwarding, which is typically handled by the Docker daemon or host system
+
+**Changes Made:**
+```bash
+# In entrypoint.sh - commented out:
+# echo 1 > /proc/sys/net/ipv4/ip_forward
+
+# In Dockerfile - removed:
+# RUN echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
+# RUN sysctl -p
+```
+
+### 2. Permission Denied Error for SSH Configuration
+
+**Error:**
+```
+cp: cannot create regular file '/etc/ssh/sshd_config': Permission denied
+```
+
+**Root Cause:** 
+The user running the `entrypoint.sh` script within the Docker container does not have write permissions to the `/etc/ssh/` directory, which is a system directory requiring elevated privileges.
+
+**Resolution:**
+- Added `sudo` prefix to the `cp` commands in `entrypoint.sh` for copying configuration files to system directories
+- This ensures the script has the necessary permissions to modify system configuration files
+
+**Changes Made:**
+```bash
+# In entrypoint.sh - changed from:
+cp /app/ssh-config/sshd_config /etc/ssh/sshd_config
+cp /app/socks5-config/danted.conf /etc/danted.conf
+
+# To:
+sudo cp /app/ssh-config/sshd_config /etc/ssh/sshd_config
+sudo cp /app/socks5-config/danted.conf /etc/danted.conf
+```
+
+## Additional Considerations for Hugging Face Spaces
+
+1. **Container Security:** Hugging Face Spaces may run containers with restricted privileges for security reasons. Using `sudo` helps bypass permission restrictions for necessary system operations.
+
+2. **Networking Limitations:** Some networking features might be restricted in cloud environments. The application should gracefully handle cases where certain network operations are not permitted.
+
+3. **File System Permissions:** System directories like `/etc/` typically require elevated privileges to modify. Always use `sudo` when copying configuration files to system locations.
+
+## Testing Recommendations
+
+When deploying to Hugging Face Spaces:
+
+1. Monitor container logs for permission-related errors
+2. Verify that SSH and SOCKS5 services start successfully
+3. Test connectivity from external clients
+4. Ensure the application handles restricted environments gracefully
+
+These fixes should resolve the common issues encountered when running the SSH/SOCKS5 NAT Gateway application in Hugging Face Spaces or similar containerized environments.
+