tramp-connection-timeout

tramp-connection-timeout is a variable defined in `tramp.el'.
Its value is

60

Documentation:
Defines the max time to wait for establishing a connection (in seconds).
This can be overwritten for different connection types in `tramp-methods'.

The timeout does not include the time reading a password.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.4 of Emacs.