[isalist] log file

i was testing out the msdetotxt script, and i found this in my log
files.
has anyone else seen this??
 
downstreamISA    anonymous       WhatsUp Professional/1.0        0
3/21/2007        3:54:20         1       isagateway             x.x.x.x
x.x.x.x0         80      60032   153     405     http    TCP     HEAD
http://x.x.x.x/  -       0       0x2FB1  0x0     -
Compression:None         -       -       0x80    8      

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