From DD-WRT Wiki

SSH access from Internet

Ensure SSH Enabled

1. Goto the Administration tab and the Services sub-tab on the Web Interface
2. Enable "SSHd" is under the section titled "Secure Shell"
3. Choose an appropriate port (The default is 22, but it is recommended that you change it to a non-standard port above 1024 for security reasons)
4. Apply Settings if needed

Enable Remote Access

1. Goto the Administration tab and the Management sub-tab on the Web Interface
2. Enable "SSH Management" under the section titled "Remote Access"
3. Apply Settings

Disabling Remote Access

1. Goto the Administration tab and the Management sub-tab on the Web Interface
2. Disable "SSH Management" under the section titled "Remote Access"
3. Apply Settings

References

• http://hetos.de/sshtut.html