External attacks are attempted by individuals without any assistance from internal contractors or employees. These attacks are performed with the use of predefined technologies and plan. It involves the process of gathering and scanning information. You can also defend this attack by scrutinizing the logs of existing firewall. You can also install intrusion detection software to identify various external threats.External attacks are divided into sub categories including structure or unstructured attacks.

Structured external attacks:

These types of threats originate from a group of malicious people or organization. These types of network attacked are performed by such individuals who think premeditatedly on the actual losses and damages. There is need to implement access control procedures, detection system and hacking tools.

Unstructured external threats: These types of attacks are attempted by inexperienced attackers. A script kiddie is the type of terminology that is related to inexperienced attacker. They use cracking or scripted tools on the web to invade the system of target source.

Internal threats: Internal attacks are performed by unhappy or dissatisfied contractors or employees. These attackers have access to the system and try to steal information from normal process. These hackers have administration privileges on the network. You can easily block these types of attack through intrusion detection system that configure these attacks both from internal or external.

Point to remember:

There are some core components that you need to remember when you design network security infrastructure for your organization.

• Network attack detection.
• Network attack prevention.
• Network attack recovery
• Network attack isolation.

Identification of entry point

You should need proper scanning programs to trace all entry point of hackers into the internal network. You need to take assistance of skilled ethical hacker to identify these security points.

Penetration tests

If you run some type of penetration tests, it will help you to identify possible vulnerable points that can be easily accessed both internal and external users. It will help you to thwart attacks from multiple external sources.

Configure firewalls

It is essential to configure firewall otherwise it will act like open door for any hacker. You must configure firewall in accordance to the security aspect of your firm.
Password policies

It is good habit to set strong password policies so that hackers cannot guess it easily. You need to compose password based on numeric and alpha characters.
You also need to install good antivirus software and some other security measures to protect your network from hacker’s attacks.