August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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14.22. Ograniczenie liczby poleceń SSH
Problem
Chcemy ograniczyć zakres działalności użytkowników i skryptów ustanawiających połączenia SSH z danym systemem[3].
Rozwiązanie
Należy zmodyfikować plik ~/.ssh/authorized_keys, uwzględniając mechanizm wymuszonych poleceń (ang. forced commands), i opcjonalnie wyłączyć niepotrzebne funkcje usługi SSH. Załóżmy, że chcemy umożliwić pracę procesowi rsync i jednocześnie wyłączyć interaktywny dostęp do systemu.
Pierwsza czynność polega na ustaleniu, jakie dokładnie polecenie zostaje wykonane w zdalnym systemie. Utwórzmy klucz (zgodnie z instrukcjami zawartymi w „14.21. Wykorzystanie usługi SSH bez hasła”) i dodajmy wymuszone polecenie, które dostarczy stosownych informacji. W tym celu trzeba otworzyć plik ~/.ssh/authorized_keys ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.