External SSH

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Contents

Setup SSH access from Internet

DD-WRT v23 SP1 or later

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

REFERENCES: Telnet/SSH_and_the_Command_Line#SSH or Sections 1.1 and 1.2 of [1]

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

DD-WRT v23 or Earlier

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

REFERENCES: Telnet/SSH_and_the_Command_Line#SSH or Sections 1.1 and 1.2 of [2]

Enable Remote Access

  1. Goto the Administration tab and the Diagnostics sub-tab.
  2. Add the following to the text area:
   /usr/sbin/iptables -I INPUT -p tcp --dport $(nvram get sshd_port) -j logaccept
  1. Save as Firewall Script

Disabling Remote Access

  1. Goto the Administration tab and the Diagnostics sub-tab.
  2. Add the following to the text area:
 /usr/sbin/iptables -D INPUT 1
  1. Save as Firewall Script

Warning!

It's not too secure to set up SSH access like that. Be sure to choose a long and secure password or even better use Public Key Method. Otherwise someone could succeed to hack your router by a Brute Force Attack. Also go through System Security to learn how to secure your Linux Server.

The above method is obsolete at this time: You should only now need to go to Administration->Management->Remote Access->SSH Management and enable it, specifying the port you wish to enable WAN access to.