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I am considering to buy a UTM-1 firewall. However, I didnt get exactly what concurrent users mean. There are three models for Concurrent Users 16/32 or Unlimited. What does this mean ? How is concurrent user measured ?

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up vote 2 down vote accepted

Each seperate IP address any machine on your network tries to cross the firewall with (even if it is blocked) counts as a single user.

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Thanks James. Do you know what happens if this limit is exceeded ? Are packets dropped or put into a wait queue or something like that ? – mete Jan 8 '11 at 20:45
It will mark those ips as blocked and log an error that you have exceeded your limit. from this handy faq… – JamesRyan Jan 10 '11 at 15:50

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