Network port scanner has become an essential part of IT admins go-to tools to secure networks with port scanning and network port investigation. Ports act as communication terminals that allow message passing between different network components by running various services. An effective port scanner tool enables full fledged network port scanning to determine which ports on your network are open and what services are running on them. Since ports act as a bridge between your server/desktop and the network, open ports that are left unmonitored might act as a passageway allowing malicious access into your systems. In order to avert these intrusions, scanning the entire network using a port scanner, has become a day-to-day network activity for many network admins.
OpUtils’ port scanner is a code-free, intuitive network port scanner that allows you to quickly find open ports in your network, the services running on them, and their response time by pulling real time port scan status. Generate a list of closed, open, or listening ports by conducting end-to-end port scan on a range of available IP addresses and their TCP and UDP ports with port scanner. OpUtils' port scanning software provides insights into each system’s footprint by enabling you to access and view all the services that are running on the system’s network endpoints/ports.
To avoid the risk vector of malicious agents exploiting your network, by using the code found in the server software, network port scanner offers various port scan features. These port scan capabilities enable you in testing all ports, which is vital to achieving an in-depth security verification.
On a large network, monitoring and managing open ports can be extremely time-consuming. Ports enable services to communicate with the applications running on your devices by exchanging data. When a port is left open, it can be easily infiltrated by malicious agents, causing unusual network traffic that indicates an infected system.
OpUtils' port scanner tool conducts continual and periodic port scanning routines and displays the details of the scanned ports, including their status. Using this list pulled by the network port scanner, you can identify and close all open ports and block ports exhibiting malicious traffic, thereby securing your network resources from unauthorized access.
OpUtils port scanner software provides you the option of directly scanning your network ports with the port scanner tool available under network tools, or you can continuously monitor your network ports using the product’s Switch Port Mapping feature.
You can easily scan specific ports in your network using the Port Scanner tool by following these three simple steps:
Step 1: In OpUtils, under Toolset, open the Port Scanner Tool that is available below the Network Monitoring tools.
Step 2: The 'Start-End IP Address' option is selected by default for scanning a range of IP addresses. If you wish to scan a specific IP address, select the 'Single IP Address' option.
Step 3: Specify the starting IP address and the ending IP address of the managed IP address block along with the port range and press scan. If you have chosen to scan a single IP address, specify the specific address and port range to scan.
The Port scanner tool scans the specified network ports and displays the ports, their response time, their status, and the services running on them.
OpUtils’ port scan software - Switch Port Mapper automatically maps your switches and ports when you add your switches and displays their status. Learn more about managing ports using switches.
Switch port scanner provides you visibility into the ports connected to a particular switch, and the devices connecting to the ports. It also tells you if there is a hub connection using the network port scanner.
OpUtils' IP port scanner probes the target ports in your network by sending an IP packet to each port. Based on the response from the ports, OpUtils' network port scanner marks ports as open and listening or closed. This provides visibility into the available ports in your network, the services running on them, and the list of open ports. The advanced port scanner can also fetch information that can be used to identify the presence of security devices such as firewalls between the source and the target—a technique known as network fingerprinting.
Network ports are usually numbered from 0 to 65535, with different ports running different services, each having a service name. These services run over the port scanner network transport protocols such as TCP, UDP, DCCP, and SCTP and can be traced by effective network port scanners. Ports numbered from 0 to 1023 (system ports) are known as “well-known ports” or “standard ports” and have been assigned the commonly used internet services. OpUtils’ network port scanner software allows you to scan these well-known ports along with the other network ports by specifying the port range to be scanned.
Some of the common port services scanned by OpUtils’ port scanning software are:
A port scanner helps you detect a potential security breach by identifying the hosts connected to your network and the services running on them, such as the file transfer protocol (FTP) and hypertext transfer protocol (HTTP).
An advanced port scanner, like ManageEngine OpUtils, provides you with an in-depth view into your network ports. This includes details like, connected IP, DNS, and MAC, along with name and details about the interface associated with a particular port. A network port scanner also enables you to identify and close all the open ports in your networks.
Port scanning ensures your network hosts are configured to run only approved network services, and prevents ports from allowing any unauthorized traffic.
Port scanning is the process of scanning all the ports in your network using network port scanner with a number of network scanner protocols such as SNMP scans. Port scanning is carried out by attempting to connect to the ports in your network, and their status is decided based on the response received by the network port scanning software, from them. This enables you to gain complete visibility of the status of ports in your network. You can pull out comprehensive summary of network port utilization by performing network port scanning.
Port scanning your network with an effective network port scanner is crucial to secure your network from unauthorized access and monitor services running on ports. Port scanning enables you to,
Network ports are scanned using multiple network scanning protocols to ensure pulling-out accurate data on the status and services running on the ports. The most commonly used port scans are:
These ICMP scans sweep the entire IP address block, or a single target IP, to check and see if the target is up. After sending an echo request, if the target sends an ICMP reply, this scan determines the target is up.
This is a commonly used port scan by port scanning tools that carries out a complete handshake process with the target to determine its status. The port scanner initially sends the target a synchronization (SYN) request. On receiving the SYN flag, the target sends the scanner a synchronization-acknowledgement (SYN-ACK). The port scanner then sends a ACK packet denoting that it has received the target’s SYN-ACK response. Based on the response received, the port scanner determines the status of the network ports.
A UDP scan attempts to find open UDP ports in a network. It is a connection-less protocol that works by sending a network packet to the target. This network packet usually carries no payload, but it can be set to carry a random payload for each port. Based on the ICMP response received from each target, the port scanner determines the status of the target.
As mentioned earlier, UDP is a connectionless protocol that enables the host to send a message to another host without first enabling a connection with a destination address. UDP ports do not usually require a response or acknowledgement from the destination.
On the other hand, TCP being a connection oriented protocol requires the network endpoints (the sender and the port) to establish a communication channel between them before they transmit messages.
Therefore, TCP port scans often provide a relevant feedback to the scanner whereas UDP port scans does not necessarily provide relevant information for a attacker.
If you are new to OpUtils' advanced IP port scanner, schedule a live demo with a product expert who will uncover all the advanced port scanning and switch port management features OpUtils has to offer.
Want to try out OpUtils' port scanner tools firsthand and see how it could work for your network? Download a 30-day free trial or visit demo.oputils.com and get started with OpUtils in less than an hour! OpUtils seamlessly integrates into your network infrastructure.