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 is recommended you change to a non-standard port above 1024 because of security)
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