is there any way to hide uptime of systems in an ASA-5520's DMZ?
from outside i see (e.g.)
Uptime 0.020 days (since Mon May 14 13:38:49 2007) TCP Sequence Prediction: Class=truly random Difficulty=9999999 (Good luck!) IPID Sequence Generation: All zeros
Nmap finished: 1 IP address (1 host up) scanned in 61.469 seconds Raw packets sent: 3429 (153.492KB) | Rcvd: 30 (1680B)