Vulnerabilities in network systems

This organization also communicates with multiple mail servers using LAN and WAN.

As a Web server. Cyber ​​hackers are always shouting and attacking the network of organizations. These attacks occur primarily at major financial institutions, government agencies and pharmaceutical companies, but this does not mean that organizations engaged in other businesses are not attacked by cyber hackers. The patient network hacker does not endanger the web server during normal business hours. He usually starts an attack from 9 p.m. And at 6 am, please reduce the possibility that someone knows the attack. This allows cyber hackers to increase the time to apply sniffers and backdoors to network hosts without worrying about system administrators. This is mainly a field aimed at hackers.

Hackers can obtain confidential information from the company by asking them to disguise themselves as employees and obtain useful information to apply social engineering to other employees.

If a hacker wishes to access network resources, a mail server is a common target. Especially companies that access email from the Internet are potential targets. To protect your mail server from attacks, be sure to apply the latest security patches to your operating system and e-mail application.

Hackers scan for firewall vulnerabilities that are not configured properly or are not configured correctly for updating. A properly configured firewall is a means to prevent hackers from attacking the network.

Filtering routers are also the main cause of hacking attacks by aggressive SNMP scanners. If attacks are enabled, the router can easily become a bridge and allow unauthorized access to the network.

A network hacker can also intercept data sent to the mail server via the network. To prevent this, network administrators can send information via the Internet or mail server using 128-bit key encryption.

Adesh Rampat has 10 years of experience in networking and IT management. He is a member of the Internet Experts Association, Network Experts Association and International Webmaster Association. He also made extensive speech on various topics.

Maintaining network security requires protecting the network system from malicious or unauthorized interference and access. This type of access may be executed using the vulnerability of the network system. Schneider (1998) uses the following definition. "Vulnerability is an error or vulnerability in design, implementation, or operation." Kizza (2009) explains this concept as follows. "System vulnerability is a vulnerability in software or hardware on a server or client that is being exploited by an identified intruder to access or shut down the network." From a practical point of view, Vulnerability means a security procedure vulnerability or lack of appropriate security measures or other controls that may be abused by intruders (Ciampa, 2008). In addition to computer systems, ie hardware and software, there are vulnerabilities.

It is a "remote" attack to use and operate through a network security vulnerability or "vulnerability" without having to access a previously vulnerable system. Vulnerabilities that require pre-access to the system are called "local" exploits. These are usually designed to increase hacker access beyond the privileges granted by the system administrator. Even if you are paying attention, do not download or open attachments for unknown people. Banks and most companies that create online personal accounts will not send you attachments. If so, it is best to ask the download on the company website or at least to see if it is legal. Adult site, avoid hackers paradise

Vulnerability assessment tool (also known as security scan tool) evaluates security of network or host system and reports system vulnerability. These tools can scan network, server, firewall, router, and application vulnerabilities. Typically, these tools detect software and hardware known security vulnerabilities or errors, determine if the system is vulnerable to known attacks and attacks, and violate established security policies, etc. Search for system vulnerabilities.