The answer is YES! NSFOCUS NIPS can block SSH connections.
You may have similar questions, for example, whether Nmap or sqlmap can be blocked by NIPS. The answer is YES, too!
These questions can often be resolved by configuring application control profile.
Follow these steps to enable SSH connection blocking:
Step 1: Click Objects on the navigation bar.
Step 2: In the navigation pane, from the Application Control drop-down list, choose Profile.
Step 3: Click New in the upper right corner of the displayed page.
Step 4: In the New Application Control Profile dialog box, select SSH for the Application field.
Step 5: Click OK.
Step 6: Click Commit in the upper right of the window.