Shelly vs KnockKnock PingPort

SSH client designed for usability and performance. RELIABLE AND FAST • Hardware accelerated text rendering. • Robust terminal emulation based on the PuTTY engine. • Works great with programs such as 'screen' and 'irssi'. CONTROL WITH GESTURES • Default gestures optimized for irssi. Just swipe to switch channels or to scroll up and down. • Fully customizable. Any keypress or action can be attached to any gesture. EASY CONNECTING • Save user credentials and configure a remote command such as ‘screen -rd’ to connect with one tap. • 3D touch support. Connect directly from the iOS home screen. CUSTOMIZABLE KEYBOARD • Easily bind custom actions to buttons on the keyboard toolbar. • Works with custom iOS keyboards such as SwiftKey. OPEN LINKS AND SELECT TEXT • Familiar iOS text selection experience. Long-press on text to show the selection controls. • Copy and paste text. • Select a URL to easily open it in the web browser. OTHER FEATURES • iCloud sync support. • Terminal color themes. Choose your favorite from the several themes included or make your own. • Key file authentication support. Import an existing private key, or create a new key and export the public key. • Host key verification and management. • Agent forwarding (OpenSSH servers only). • Keep connections alive while the app is in the background. • Connection history with optional realtime location data. • Plenty of other configuration options. Please note that some features require a paid upgrade. You can try all features for free for a limited time.

KnockKnock opens access to your servers with one tap. It sends the knock your firewall expects, a sequence of TCP and UDP ports or ICMP echo requests of agreed sizes, and shows each step as it goes. PORTKNOCK • Name, host (domain, IPv4 or IPv6) and an ordered list of ports, each TCP or UDP • Delay between ports from 0 to 1000 ms to fit your knockd timeout • Progress for every port, and the time of the last knock in the list PINGKNOCK • Ordered groups of ICMP echo requests: count × data size in bytes • The equivalent ping commands, to try the same knock from a terminal • A table of ICMP and IP packet sizes to match your firewall rule, such as iptables -m length or MikroTik packet-size • A warning when VPN or cellular networks may split large packets Works with knockd and any firewall that opens access after a sequence of packets. PRIVATE BY DESIGN • No account, no analytics, no ads, no tracking • Records stay on your iPhone unless you export them, and packets go straight to the hosts you enter FREE AND PRO The free version keeps one PortKnock server and one PingKnock target. KnockKnock Pro, a one-time purchase, removes the limit and lets you export and import your records as a file, to move them to another iPhone. No subscription. Port knocking hides a service but does not replace SSH keys or passwords.