PortKnock 4.18

Overview

• This application is a simple port knocker for the iPhone, primarily useful for network administrators. It requires a port knock daemon to be running on the server for functionality.

Features in this version of Port Knock:

• Password Protection
• Knock Validation
• Import/Export Hosts
• Auto App Launcher(+)
• Knock Progress Screen
• Shows your External IP Address
• Arbitrary number of ports per host
• An unlimited number of host definitions
• TCP/UDP configuration per port
• Selectively sending knocks through WiFi or Carrier/3G networks
• Configurable interpacket delay
• No advertising

Use Cases

• This app is convenient when on a WiFi network without access to a port knocker on available computers. It can also be effectively used with TouchTerm or any other ssh or telnet software by providing the hostname and a list of ports with the choice of sending TCP or UDP packets.

Brief Description of Port Knocking for the Layman:

• Port Knocking is a security technique to protect services behind a firewall until a specific knock sequence is given, distinct from port scanning which is used for discovering open services on a system.
• Imagine leaving your kids at home alone. You teach them to listen for a certain knock that only your family knows, similar to how servers can be instructed to respond to specific knocks sent via this application.

Additional Info

• If you require a knock server, Judd Vinet's knock daemon for Linux is recommended due to its ease of use: http://www.zeroflux.org/projects/knock
• For more information and resources on port knocking, visit http://www.portknocking.org/

Notes

• + Some limitations apply to the Auto App Launcher feature; for SSH, only temporary connections can be created, and Mail operations may initiate a new compose mail window first due to iOS integration constraints.

Support

• To report bugs and suggest features, contact danny@sungheroes.com for prompt assistance rather than posting in reviews.

History

• 2022-02-28 PortKnock 4.18 released with restored functionality of Auto App Launcher and resolved import bugs.