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Warning Warning Warning about these dastardly devices.
This is now the third customer who has installed a sourcefire module in
their ASA firewall. It WREAKS HAVOC with IBM i. First customer it
totally blew POWRERHA out of the water. Wouldn't even allow the cluster
to start. Sourefire claimed it was some HP protocol (based on the port
number) but didn't meet some spec and dropped all the packets after
packet 1.
Today it was a simple FTP of PTF Images from IBM. A couple got through
before it declared Adobe Acrobat file size out of bounds invalid format
byte mismatch unsynchronized pointer violation error retry limit
exception with miscolored M&Ms. OK I made that last bit up but the net
is that MUCH time was wasted getting bits and parts of the Image files
but nearly all the images were incomplete.
Solution? Add an access rule to the ASA that stops the traffic to and
from IBM i from passing through the sourcefire module. Not sure how
those things work but so far they appear to work badly.
You have been warned.
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