Port knocking is a method of externally opening ports, which, by default, the firewall keeps closed, by generating a connection attempt on a set of pre-specified closed ports.
Termius for iOS and Android provides a port knocking client supporting both UDP / TCP protocols and inter-packet delays.
To send a knock sequence in Termius, you'll need to:
- Create a snippet of the port knocking type.
- Run it from the Snippets screen.
Important: You must have a port knock daemon running on your server to be able to use this feature.
Note: Port knocking is available only through a Termius subscription.
Create a Port Knocking Snippet
- Open the Snippets screen.
- Tap + and then tap Port Knocking Snippet.
- (Optionally) in the Name field, specify the name of the snippet.
- (Optionally) in the Default Destination field, specify a host that will be receiving the knock sequence.
- In the Knock Sequence section, create a knock sequence. Each item in the sequence is either a TCP or UPD packet sent to a required port, or a delay (pause).
Note: Tap and hold an item in the sequence to re-arrange it.
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