Cisco ASA 5510 - Monitor Port Traffic

Posted on 2009-04-15
Last Modified: 2013-11-16
How can I monitor port 25 traffic on my ASA 5510?
Question by:bschwarting
    1 Comment
    LVL 1

    Accepted Solution

    add these to your ASA:
    access-list filtermail permit tcp any any eq 25
    capture filtermail access-list filtermail interface inside.

    Then you can do "show capture filtermail", and it will show all of the
    packets going on the inside interface on port 25.

    "clear capture filtermail" will clear the capture buffer.

    then add a no to each command to remove the capture:
    no access-list filtermail permit tcp any any eq 25
    no capture filtermail access-list filtermail interface inside

    you can also search the capture by doing:
    show capture filtermail | include

    that will show everything in the capture with IP

    hope this helps someone in the future!

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