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TOPIC: ASA5505, tons of "duplicate tcp syn from outside"

ASA5505, tons of "duplicate tcp syn from outside" 8 years 4 months ago #26998

ASA5505, tons of "duplicate tcp syn from outside" messages......what does this mean and how do I correct it?
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Re: ASA5505, tons of "duplicate tcp syn from outside&qu 8 years 4 months ago #27046

  • Elohim
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It probably means that you are dropping SYN packets and the sender will retransmit trying to establish a session.

ASA5505, tons of "duplicate tcp syn from outside" messages......what does this mean and how do I correct it?
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Re: ASA5505, tons of "duplicate tcp syn from outside" 8 years 3 months ago #27280

  • Patiot
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or it may be a syn attack .

You can limit the embryonic connections with the static or any translation statement for that matter . Ideally unlimited connections are allowed that`s the reason you see tonnes of them .

Thanks

patiot
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