There are three likely scenarios that could have caused this message to appear:
By submitting your email address, you agree to receive emails regarding relevant topic offers from TechTarget and its partners. You can withdraw your consent at any time. Contact TechTarget at 275 Grove Street, Newton, MA.
- First, in the best case, it's a false alarm. Intrusion detection systems (IDSes) often generate false positive alerts. In order to determine if this is the case on your systems, you'll have to look at the details of the alerts and determine whether the packets triggering the alerts appear to be legitimate activity for your environment. What may be considered a legitimate packet on one network could be a rogue packet on another.
- The second possibility is that the intrusion attempt came from an infected system on the local network. If this is the case, the alert should still provide you with valuable information: the address of the system causing the alert. You should check that system for any signs of malicious activity.
- The final possibility is that your systems received the attack from outside your local network. In this case, you likely have a misconfiguration on your network firewall that allowed the traffic to reach the endpoint. Check your configuration and ensure that external traffic is not allowed into networks hosting endpoint systems without the use of a VPN.
Good luck tracking down the source of this attack!
Dig Deeper on Network Intrusion Detection (IDS)
Related Q&A from Mike Chapple
The rights of medical identity theft victims have been confused by health providers, but the rules under HIPAA are actually quite clear. Expert Mike ...continue reading
The New York State Department of Financial Services announced plans to increase cybersecurity regulations for financial firms. Here's what they need ...continue reading
Smaller organizations have a tougher time handling the compliance burden, specifically from the PCI DSS requirements. Expert Mike Chapple has some ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.