Scan.generic.portscan.udp Kaspersky Instant

The source sends a series of UDP packets to various port numbers. If the computer responds, the scanner knows a service is running there.

: An attacker may be scanning your IP address to find vulnerabilities. By identifying which UDP ports are open (such as those used by DNS, DHCP, or VoIP services), an attacker can plan a more targeted strike. False Positives and Network Noise

He never even knew his machine had been whispering to the void. But the void had almost whispered back. scan.generic.portscan.udp kaspersky

“Probably a worm,” she muttered, isolating the device. But Kaspersky’s behavioral engine flagged something else: the scan wasn’t random. It was probing port 161 (SNMP) and port 137 (NetBIOS) in a slow, rhythmic pattern. Not a scan for vulnerabilities. A scan for echoes .

Kaspersky treats UDP port scans differently than TCP scans because UDP is "connectionless." In a TCP scan, the scanner sends a SYN packet, and if a port is open, it receives a SYN-ACK. It is a handshake. The source sends a series of UDP packets

, this process is unique because UDP is "connectionless." Unlike TCP, which requires a formal "handshake" to establish a connection, UDP simply sends packets to a destination. When Kaspersky triggers a Scan.Generic.PortScan.UDP

. While these alerts can be alarming, they are a standard part of a firewall’s defensive mechanism, signaling that the system has detected and blocked a specific type of reconnaissance activity. The Nature of UDP Port Scanning By identifying which UDP ports are open (such

Occasionally, your Internet Service Provider (ISP) may perform network diagnostics that look like a scan to your firewall.

A botnet or a hacker may be scanning the internet for vulnerable devices (like an unsecured database or a remote desktop port). Should You Be Worried? In most cases, no .