TCP Reset Question

[avilt]

I have a query on TCP/IP communication. Let's say I have a cisco device running with http server disabled. If I send a TCP syn packet to the device with destination port 80/443(any non-listening port), will the device respond with TCP RESET? Or will it simply drop the packet without any acknowledgement?

[Rodrigo Gurriti · Accepted solution]

I think this will be different from device to device:

ASA will drop denied connection to services it does not run, to make it send resets use the command "service resetoutside" to send reset to a denied TCP packet to outside interface.

Access Points will by default reset

Routers  will by default reset

Switches will by default reset

Regards,

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