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Generally speaking, how do firewalls handle Comet style protocols? Are there firewalls that are better at handling a large number of mostly idle long-polling connections?

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up vote 2 down vote accepted

Most respond well, though some (particularly old/cheap models) have arbitrary time limits on connections. You're unlikely to have issues with a semi-modern firewall though.

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Does this apply also to application-aware firewalls? (The kind that check for SQL injections and the like?) –  ripper234 Jul 15 '10 at 14:29
    
Yes, unless the the data in the connection trips a rule. –  Chris S Jul 15 '10 at 15:29
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