The application layer, however, doesn’t do applications. It provides services such as message or file transfer, directory lookup, transaction processing, etc., to the true user applications.

As soon as you allow an application through your firewall, there is a possibility of a layer attack on it. Of course, we have to let applications through firewalls to do business – to allow ...

Application layer attacks have been with us since the first internet-facing applications. However, a recent survey showed 89% of respondents admitted to an application attack in the past year.