Hi Gregory,
Thanks man appreciate your response.... just one point... I know the DNS express tab appears in LTM but I believe unless the box is license for GTM this feature won't work, correct me if I am wrong. Also I need to further understand your point when you say " implementing only the GTM module can already help you protect against DDoS attacks" two points comes to my mind.
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The no. of queries that the GTM can answer per second is very huge so in order to bring down this box the setup (attack) that may generate very huge amount of query is not easy to setup.
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On GTM we can configure iRules to accept or block certain types of queries so that is one of the ways to enable protection.
What are more features that the GTM can offer that I have missed can you pls highlight.
Regards,