How to implement multi-user access to the SUFD portal?

Question

Electronic accounting

Briefly about the essence: What is SUFD? This is another state portal, which, as usual, is protected, but they do not give normal instructions, namely the treasury.
There are:
Two machines, one of which has already installed all the crap (continent up, signatures, java, firefox). On the second one, Java, Firefox and, just in case, user signatures are installed.
The essence of the problem:
From the time I googled, it was revealed that the continent up is not needed on the second machine, the signatures are also needed somehow to do all this so that one machine gets to the portal at the expense of the other. Tried to prokidyvat gateways (computers in the same network) (possibly crooked).
In general, at this place I was lost, a huge request to put on the right path. =(