My N08 internet security activity log reports an attempted intrusion each time I activate internet explorer and log onto internet. The message is below. I rang my ISP and they said the Intruder is actually their DSN (double checked the number); however, also made comment that they cannot understand why Norton is identifying their DSN as an intruder. Can anyone shed light on this?
Details: Attempted Intrusion "Portscan" against your machine was detected and blocked.
Intruder: 210.15.254.240(domain(53)).
Risk Level: Medium.
Protocol: UDP.
Attacked IP: 220.253.191.243.
Attacked Port: 57576.
You can get detailed information about this attack at Symantec Security Response.