IP port over 65535 ?!

I sometimes see a port number like this in Tcpdump:

10.0.0.76.2049 > 64.x.x.5.796094310: reply ERR 394

64.7.197.5.791752241 > 10.0.0.76.2049: 1460 proc-170106..

Ever seen anything like this?

I'm a small natting ISP -- all of the above looks good
except that port 
number of 791752241..

Thanks!

-Jesse Gordon


Nikola Engineering Inc.
224 W. Washington St.
Suite 104
Sequim, WA 98382-3371
Tel  (360)582-1051
Fax (360)582-1104