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Remote Access

SSH Protocol Overview​

SSH (Secure Shell) provides secure remote access to Port systems for administration and monitoring.

SSH Client Setup​

PuTTY Installation​

PuTTY is a free, open-source terminal emulator supporting SSH, Telnet, and other network protocols.

!!! tip "Download PuTTY" Download PuTTY Application

SSH Connection Process​

1. Connection Configuration​

PuTTY Connection

Connection Details:

  • Host: 127.0.0.1
  • Port: 22
  • Protocol: SSH

!!! note "Default Credentials" - Username: admin - Password: admin

2. Authentication​

SSH Login

Enter your credentials when prompted to establish the secure connection.

3. Command Execution​

SSH Commands

Once connected, you can execute various Port commands remotely:

  • View system status
  • Access log files
  • Monitor project operations
  • Perform administrative tasks

Remote Command Examples​

Basic System Commands​

# Check server status
status

# Get server uptime
uptime

# Measure network latency
latency

Data Access Commands​

# Get data from server
get Equipment Status
get SECS Temperature
get MyProject.log

# Set data on server
set Equipment Status RUNNING
set SECS CommState ENABLED
set Process Temperature 150.5

Log Access Commands​

# Access project logs
get sample.log
get MyProject.log

# Access package logs
get SECS.log
get GEM.log

# Access system events
get SECS.event
get GEM.event

Administrative Commands​

# User management
set password admin oldpass newpass123
set grant operator 2

# System notifications
set notify "Process completed successfully"

# Package operations
set init SECS
set init GEM

SSH Security Best Practices​

Connection Security​

  1. Change Default Credentials: Always change default username/password
  2. Use Strong Passwords: Implement complex password policies
  3. Enable Key-based Authentication: Use SSH keys instead of passwords when possible
  4. Limit Access: Restrict SSH access to authorized users only

Network Security​

  1. Firewall Configuration: Configure firewall rules for SSH access
  2. Port Configuration: Consider changing default SSH port (22)
  3. IP Whitelisting: Restrict access to specific IP addresses
  4. VPN Integration: Use VPN for additional security layer

Session Management​

  1. Session Timeout: Configure automatic session timeout
  2. Connection Monitoring: Monitor active SSH connections
  3. Audit Logging: Enable comprehensive SSH audit logging
  4. Failed Login Protection: Implement failed login attempt protection

Troubleshooting SSH Connections​

Common Connection Issues​

Connection Refused​

# Check if SSH service is running
get status

# Verify port configuration
get config ssh_port

Authentication Failures​

# Verify user credentials
get user admin

# Check authentication logs
get auth.log

Network Connectivity​

# Test network connectivity
ping 127.0.0.1

# Check firewall status
get firewall status

Error Resolution​

ErrorCauseSolution
Connection timeoutNetwork/firewall issueCheck network connectivity and firewall rules
Authentication failedWrong credentialsVerify username/password
Permission deniedUser access restrictionsCheck user permissions and access rights
Host key verification failedSSH key mismatchUpdate or remove old host keys

Advanced SSH Features​

SSH Tunneling​

Create secure tunnels for accessing internal services:

# Local port forwarding
ssh -L 8080:localhost:5001 admin@127.0.0.1

# Remote port forwarding
ssh -R 9090:localhost:5001 admin@127.0.0.1

SSH File Transfer​

Transfer files securely using SSH protocols:

# Using SCP (Secure Copy)
scp file.txt admin@127.0.0.1:/remote/path/

# Using SFTP (SSH File Transfer Protocol)
sftp admin@127.0.0.1

SSH Key Management​

Generate and manage SSH keys for enhanced security:

# Generate SSH key pair
ssh-keygen -t rsa -b 4096

# Copy public key to server
ssh-copy-id admin@127.0.0.1

Integration with Port Applications​

Remote Monitoring​

Monitor Port applications remotely through SSH:

# Monitor system resources
get system resources

# Check application health
get health status

# View real-time logs
get logs --follow

Remote Configuration​

Configure Port applications remotely:

# Update configuration
set config parameter value

# Restart services
set service restart

# Deploy updates
set deploy package_name

Remote Debugging​

Debug Port applications remotely:

# Enable debug mode
set debug enabled

# View debug logs
get debug.log

# Set breakpoints
set breakpoint function_name