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The global strategy of computer hacking

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Whoever operates on the Web and has even interesting or relevant data sooner or later will always be hacked by someone or by some organizations.

 Usually “economic” hackers take the data of interest from the victim’s network and resell it in the dark web, i.e. the system of websites that cannot be reached by normal search engines.

Currently, however, after the Bayonet operation of July 2017 in which many dark web areas were penetrated, we are witnessing a specialization of the dark web and an evolution of web espionage methods against companies and States.

 These operations which, in the past, were carried out by web amateurs, such as youngsters at home, are currently carried out by structured and connected networks of professional hackers that develop long-term projects and often sell themselves to certain States or, sometimes, to some international crime organizations.

As often happens in these cases, the dark web was born from research in the military field. In fact, in the 1990s, the Department of Defense had developed a covert and encrypted network that could permanently protect the communications of the U.S. espionage “operatives” who worked abroad.

Later the secret network became a non-profit network that could be used for the usual “human rights” and for protecting privacy, the last religion of our decadence.

 That old network of the State Department then intersected with the new TOR Network, which is the acronym of The Onion Router, the IT “onion” covering communication with different and often separable encryption systems.

 TOR lives on the Internet edge and it acts as the basic technology for its dark web.

 Like the “Commendatore” vis-à-vis Don Giovanni in Mozart’s opera.

 TOR, however, is a free browser that can be easily extracted from the Web.

Obviously, the more the anonymity of those who use TOR and go on the dark web is covered by effective encryption systems, the more unintentional signals are left when browsing the dark web.

Moreover, the farther you have to go, the more pebbles you need to go back, as in the Thumbelina fairy tale.

 TOR and the Dark Web were born to allow the communications of U.S. secret agents, but were later downgraded to “free” communication system to defend Web surfers from “authoritarian governments”. Currently the dark web hosts a wide underground market where drugs, stolen identities, child pornography, jihadist terrorism and all forms of illegal business are traded.

Moreover, if these dark web services are paid with uncontrollable cryptocurrencies, it is very difficult to track any kind of dark web operations.

Nowadays, about 65,000 URLs operate in the dark web, which means Internet websites and Universal Resource Locators that operate mainly via TOR.

A recent study of a company dealing with cybersecurity has demonstrated that about 15% of all dark web URLs facilitate peer-to-peer communication between users and websites usually by means of chat rooms or websites collecting images, pictures and photos, which are often steganographic means and transmit hidden and concealed texts, but also for the exchange of real goods via specialized websites for peer-to-peer trading that are also encrypted, as can easily be imagined.

 Moreover, a further study conducted by a U.S. communication company specialized in web operations has shown that at least 50% of the dark websites is, in fact, legal.

 This means they officially deals with things, people, data and pictures that, apparently, also apply to “regular” websites.

  In other words, the dark websites have been created by means of a regular request to the national reference office of ICANN, which grants the domains and registers the permitted websites, thus communicating them to the Californian cooperative that owns the web “source codes”, although not in a monopolistic way.

Currently all the large web organizations have a dark “Commendatore” in the TOR area, such as Facebook, and the same holds true for almost all major U.S. newspapers, for some European magazines but also for some security agencies such as CIA.

Nevertheless, about 75% of the TOR websites listed by the above stated IT consultancy companies are specialized URLs for trading.

 Many of these websites operate only with Bitcoins or with other types of cryptocurrencies.

Mainly illegal pharmaceuticals or drugs, items and even weapons are sold in the dark web. Said weapons are often advanced and not available in the visible and overt networks.

 Some URLs also sell counterfeit documents and access keys for credit cards, or even bank credentials, which are real but for subjects other than those for whom they were issued.

In 2018 Bitcoin operations were carried out in the dark web to the tune of over 872 million US dollars. This amount will certainly exceed one billion US dollars in late 2019.

It should be recalled that the total amount of money “laundered” in the world accounts for almost 5% of the world GDP, equal to 4 trillion US dollars approximately.

Who invented the Bitcoin?

 In 2011, the cryptocurrency was used for the first time as a term of trade only for drug traffickers operating in the dark web, mainly through a website called Silk Road.

 The alias used for those exchanges was called Satoshi Nakamoto, that was also filmed and interviewed, but was obviously another.

We should also recall web frauds or blackmails: for example, InFraud, a U.S. organization specialized in the collection, distribution and sale of stolen credit cards and other personal data.

Before being discovered, InFraud had illegally made a net gain of 530 million US dollars.

 Another group of illegal operators, Fin7, also known as Carbanak, again based in the United States, has collected over a billion US dollars on the web and has put in crisis, by blackmailing them, some commercial organizations such as Saks Fifth Avenue and Chipotle, a widespread chain of burritos and other typical dishes of Mexican cuisine.

 Obviously the introduction of new control and data processing technologies, ranging from 5G to biometric sensors, or of personal monitoring technologies, increases the criminal potential of the dark web.

Hence the dark web criminals will have an even larger mass of data from which to derive what they need.

 The methods used will be the usual ones, such as phishing, i.d. the fraudulent attempt to obtain or to deceive people into sharing sensitive information such as usernames, passwords and credit card details by disguising oneself as a trustworthy entity in an electronic communication possibly with a fake website, or the so-called “social engineering”, which is an online scam in which a third party pretends to be a company or an important individual in order to obtain the sensitive data and personal details of the potential victim,  in an apparently legal way, or blackmail by e-mail and finally the manipulation of credentials.

With a mass of additional data on their “customers”, the web criminals will be able to perfect their operations, thus making them quicker and more effective. Or the new web technologies will be able to accelerate the time needed for blackmail or compromise, thus allowing a greater number of frauds for more victims.

 Biometrics certainly expands the time for the use of data in the hands of cybercriminals. Facial detection or genetic and health data are stable, not to mention the poor security of data held by hospitals. Or we have to do with the widespread dissemination of genetic research, which will provide even more sensitive data to web swindlers.

 According to some recent analyses carried out by the specialized laboratories for the Web, 56% of the data most used by web criminals comes from the victims’ personal data, while 44% of the data used by swindlers comes from financial news.

 Moreover, specific types of credit cards, sold by geographical area, commercial type and issuing bank, can be bought in the dark web.

 85% of them are credit cards accredited for a bank ceiling, while 15% of “customers” asks for debit cards.

The web scammers, however, always prefer e-mail addresses even to passwords.

Furthermore, less than 25% of the 40,000 dark web files have a single title.

  In the “dark” web there are over 44,000 manuals for e-frauds, available for sale and often sold at very low prices.

The large and sometimes famous companies are the mainly affected ones. In 2018 the following companies were the target of cyberattacks in the United States: Dixus, a mobile phone company which was stolen 10 million files; the Cathay Pacific airline, with 9.4 million files removed, but also the Marriott’s hotel chain (500 million data/files removed) and finally Quora, a website of scientific documents and generic data. Over 45 million files were removed from Quora.

 How can we know whether we are the target of an attack from the Dark Web? There is certainly the presence of ransomware, such as the recent Phobos, which uses the Remote Desktop Protocols (RDP) that allow to control computers remotely.

 Then there is the Distributed Denial of Service (DDoS), which is a temporary block of the Web, apparently accidental, and finally there is the traditional malware, the “malicious” software that is used to disrupt the victims’ computer operations and collects the data present on their computers.

 However, the Dark Web ambiguity between common crime and the defence of “human rights” and safe communications in “authoritarian regimes” always remains.

The United States, Iran, China and other countries have already created a “fourth army”, composed only of hackers, that operates with cyberattacks against the enemies’ defence and civilian networks.

 The US Cyber Command, for example, is estimated to be composed of as many as 100,000 men and women, who operate 24 hours a day to hit enemy servers (and also allies’ ones, when they contain useful information).

Just think also of the private group Telecomix, which supported the 2011 Arab rebellions and, often, also the subsequent ones.

Also in these months both Telecomix and Anonymous are working to permit the free use of the Syrian computer network.

 There is often an operative interface between these groups and the Intelligence Agencies, which often autonomously acquire data from private networks, which, however, soon become aware of the State operations.

 There is also cyber-rebellion, which tries – often successfully – to strike at the victims’ data stored, by deleting them.

 DDoS, the most frequent type of attack, often uses a program called Low Orbit Ion Cannot (LOIC) which allows a large number of connections to be established simultaneously, thus leading to fast  saturation of the enemy server.

The attacking computers can be used remotely and some groups of hackers use thousands of computers simultaneously, called “zombie machines”, to hit the database in which they are interested to delete it or to remove its files.

 This type of “fourth army” can inflict greater damage on a target country than a conventional armed attack. The faster the attack, the easier is to identify the origin of the operation.

It is currently estimated that the “zombie” computers in the world are over 250 million – a greater network than any other today present in the military, scientific and financial world.

Hence a very dangerous military threat to critical infrastructure or to the economic resources of any country, no matter how “advanced” it is technologically or in terms of military Defence.

 There have been reports of hackers linked to global drug organizations, especially Mexican cartels, and to jihadist or fundamentalist terrorist groups.

Financial hacking, which often supports all these initiatives, remains fundamental.

 The South Korean intelligence services’ operative Lim was found “suicidal” after having purchased a program from the Milanese Hacking Team.

A necessary tool for these operations is often a briefcase containing circuits which mimic the towers of cellular repeaters and store in the briefcase itself all the data which is transferred via cetel or via the Internet Network.

The Central Bank of Cyprus, the German CDU Party and many LinkedIn accounts – a particularly favourite target of hackers – some NATO websites and, in Italy, some business and financial consultancy companies were attacked in this way.

 It is a completely new war logic, which must be analysed both at technical and operational levels and at theoretical and strategic levels.

Advisory Board Co-chair Honoris Causa Professor Giancarlo Elia Valori is an eminent Italian economist and businessman. He holds prestigious academic distinctions and national orders. Mr. Valori has lectured on international affairs and economics at the world’s leading universities such as Peking University, the Hebrew University of Jerusalem and the Yeshiva University in New York. He currently chairs “International World Group”, he is also the honorary president of Huawei Italy, economic adviser to the Chinese giant HNA Group. In 1992 he was appointed Officier de la Légion d’Honneur de la République Francaise, with this motivation: “A man who can see across borders to understand the world” and in 2002 he received the title “Honorable” of the Académie des Sciences de l’Institut de France. “

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Somalia: Security Council adopts resolution to keep pirates at bay

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Suspected pirates wait for members of the counter-piracy operation to board their boat. US Navy/Jason R Zalasky

The UN Security Council on Friday adopted a resolution to combat the continuing threat of piracy off the coast of Somalia, as shipping and protection measures to keep vessels safe, have returned to levels not seen since before the COVID-19 pandemic.

The Secretary-General’s latest report on the situation in the country illustrates that joint counter-piracy efforts have resulted in a steady decline in attacks and hijackings since 2011.

However, although piracy off the coast of Somalia has been “repressed”, the ongoing threat of resurgence remains.

As such – under Chapter VII of the Charter, which provides for enforcement action – the Security Council adopted Resolution 2608, which, among other things, condemns piracy and armed robbery at sea off the Somali coast, underscoring that it exacerbates instability by introducing “illicit cash that fuels crime, corruption and terrorism”.

Making amends

Through its resolution, ambassadors said that investigations and prosecutions must continue for all who “plan, organize, illicitly finance or profit from pirate attacks off the coast of Somalia”.

The Somali authorities were called upon to put in place mechanisms to safely return effects seized by pirates and to patrol the coastal waters to prevent and suppress future acts of armed robbery at sea.

At the same time, they were requested to bring to justice those using Somali territory to “plan, facilitate, or undertake criminal acts of piracy and armed robbery at sea”.

Member States were asked – at the request of the Somali authorities and with notification to the Secretary-General – to strengthen maritime capacity in the country and to appropriately cooperate on prosecuting suspected pirates for taking hostages.

The resolution also encourages the Somali Government to accede to the UN Convention against Transnational Organized Crime, and develop a corresponding legal architecture as part of its efforts to target money laundering and financial support structures on which piracy networks survive.

Authorization to fight piracy

The Security Council renewed its call to States and regional organizations to deploy naval vessels, arms, and military aircraft to combat piracy, and stressed that the importance of international coordination.

At the same time, the resolution authorized – for a further three-month period – States and regional organizations cooperating with Somali authorities, to fight against piracy and armed robbery at sea off Somalia, “for which advance notification has been provided by Somali authorities to the Secretary-General”.

Calls to action

Through its resolution, the Council called upon all States to “take appropriate actions…to prevent the illicit financing of acts of piracy and the laundering of its proceeds…[and] to criminalize piracy under their domestic law”.

Countries were also petitioned to cooperate in the investigation and prosecution of anyone responsible for or associated with acts of piracy and armed robbery off the coast of Somalia, including international criminal networks.

Resolution 2608 welcomed the continued work of the UN Office on Drugs and Crime’s (UNODC) Global Maritime Crime Programme to ensure that those suspected of piracy are prosecuted, and those convicted, imprisoned in accordance with international legal standards.

Finally, the resolution recognized the International Maritime Organization’s (IMO) role concerning privately contracted security personnel on board ships in high-risk areas and welcomed its continued anti-piracy role – particularly in coordination with UNODC, the World Food Programme (WFP), the shipping industry and all other parties concerned.

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ISIS-K, Talc, Lithium and the narrative of ongoing jihadi terrorism in Afghanistan

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Terrorism

Chinese and Russian efforts are underway to strengthen the Taliban government economically and militarily, along with legitimacy and international recognition. In return, Pakistan is trying to disrupt the Taliban government’s relations with Iran and Tajikistan, as well as with China and Russia. Subsequent to the fall of the previous republican government, following Russia and China, Iran is a major supporter of the Taliban.

Iran plays a significant role in a new intelligence surge launched by major regional players in Afghanistan, which includes ISIS-K campaign against the Taliban government in country. Although Taliban have been able to crush, ISIS-K in several provinces of Afghanistan, but the group was able to mobilize a bunch of other terrorist organizations such as Turkistan Islamic Party, Khetabat Iman Ul Bekhari, Khetabat ultauhied Waljihad, Islamic Jihad Union, Jamaat Ansarullah and East Turkistan Islamic Movement, and The Army of Justice. According to sources on the ground, the group has also established contacts with the resistance front led by Ahmad Massoud to fight Taliban.

Seemingly, the group joined forces with the Resistance Front in northern part of the country to downfall the Taliban particularly in northern Afghanistan.  In addition to defeating the Taliban in the central and southern provinces of Afghanistan, the group has started a sectarian war between the Sunnis and Shiites, which has partly soured relations between the Afghan Taliban and Iran. The group had the support of Pakistan as well as other regional countries and beyond.  Furthermore, Lashkar-e-Taiba fighters entered Afghanistan with the help of the Pakistani army, joining the fight between Sunni and Shia in Afghanistan.  Efforts are underway to start a civil war in the country.  According to the information, ISIS militants have been mostly funded and financed by the Saudi government, as well as other Salafi Gulf States to minimize and even eradicate Shiites in the region.

In accordance with some sources, additional costs are being borne by the United States and Great Britain.  Beside all such financial support, Islamic State (ISIS-K) militants also obtain some funding and thrive through mining and establishing business firms throughout the region.

Let us say, Islamic State militants relatively control the oil reserves in Iraq and they illegally extract it, meantime they have hands on talc and other precious stones in Afghanistan to cover their propaganda campaign expenses. ISIS-K uses the same tactics applied by Taliban during the US occupation; Taliban began illegal mining in Afghanistan to finance their activities in order to wage the war against the US aggression.   During the Taliban’s resistance, Taliban fighters had also a strong financial support from Pakistan, and the Pakistani government accordingly received that financial sustenance from other countries namely western and the Arab world.  However, the Taliban forcibly mined Afghanistan’s lapis lazuli and smuggled it to Pakistan. Under the auspices of the Pakistani government, the gems were shipped to the United States and the European countries.  In return, the Taliban were paid in cash.  Likewise, the Taliban, ISIS chose the same path, and made the most of money via mining in Afghanistan.

Subsequently, the ISIS group has chosen Nangarhar province as its stronghold in Afghanistan, since it has mineral deposits of talc, chromite, marble and other precious and rare earth minerals in addition, the group is also trying to control smuggling routes, to launch cross border terrorism.

 Consequently, ISIS-K endeavors to bring Ghazni province under its control, since a huge Lithium, mine exists in the province. The group is well aware of its preciousness in the world market because the element is mainly used by automotive industries to produce batteries for electric cars.

The anti-corruption network of the former Afghan government reported that the Taliban and the Islamic State together received about 46 million in 2016 thru illegal mining from a single district of Nangarhar province. That is why ISIS has spent millions of dollars in Afghanistan because of holding its campaign and propaganda, allegedly, most of which came from mining.

Furthermore, district governors have been appointed by ISIS for Afghanistan’s 387 major districts, with a monthly salary of up to 80,000 Afghanis.  This is a huge financial burden for the Islamic State, but the Islamic State group’s representatives say that they stick to their words, so that everyone will be paid on time. The ISIS group needs a large amount of financial support to achieve its major goals, but the group is not overstrained financially, because it receives a chockfull financial support.

Conversely, Iran is trying to increase the number of Shiite orientated proxies in the world and especially in Afghanistan to eliminate ISIS-K in return; the Saudi and other Gulf Sates want to prevent it. Therefore, they use ISIS and other associates of the group to counter Iran’s ambitious trans-national agenda; ISIS-K takes advantage of having been provided with huge financial support by anti-Iran camp.

Iran has repeatedly tried to spread Shia religion around the world, most notably at Mustafa International School in Bamko, the capital of Mali in Africa.  There have been several attempts by the Iranian government to convert the students to Shi’ism, an issue that has become the topic of international debate supported by Saudi Arabia.  Finally, all of these events are currently having a direct and indirect impact on Afghanistan and the country’s ongoing security crisis, which will affect the entire region at the end.

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The means to manage cyberspace and the duty of security

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Over and above the ethical concepts regarding the near future, it is also good to focus on the present. Governments are required to protect their national resources and infrastructure against foreign and domestic threats, to safeguard the stability and centrality of human beings and political systems and to ensure modern services for civilians. Suffice it to recall the chaos that arose some time ago in the Lazio region for the well-known health issues.

Governments must play a key role in developing and leading the local ecosystems, but this national effort must involve many other stakeholders: local businesses, entrepreneurs, multinational companies, local and foreign investors, State agencies, Ministries and academics, people in education, professional institutions and the public at large.

Furthermore, cybersecurity is a national opportunity for developing the local economy and for positioning any country in the international arena as a safe place to establish and develop economic relations between States and companies. It is also important as a regional cyber hub.

Cyber strategy therefore consists in prioritising operational cyber activities with a view to optimising and monitoring the overdevelopment of cyber intelligence that could one day take such turns as to be ungovernable.

This is the reason why investment in technology, local capacity building and resource allocation and concentration are required. This means providing strategic advisory services to government agencies that are seeking to advance cyber security at a strategic and operational level.

It is therefore necessary to work with governments to develop their strategic and operational capabilities in cybersecurity, either at the national or sectoral level, as well as providing comprehensive cyber projects that combine cyber defence and the development of a local cyber ecosystem, based on the models tried and tested by various countries around the world, such as the People’s Republic of China, Israel, the United States of America, etc.

There is a need to specialise in setting up Cyber Units and Cyber Centres (SOC & Fusion Centres) and in developing Cyber Eco-Systems and Cyber Strategies. This means providing various cyber solutions, services and know-how to companies in various sectors, such as financial, industrial, energy, health, technology and many other sectors.

Stable OT (operational technology) security services and strategic advice to companies in the fields of energy, manufacturing, security, medicine, transport, critical infrastructure and many others create the prerequisites for defending cyberspace. As well as helping OT-based organisations integrate cybersecurity into their processes and products. Design, develop and deliver advanced technologies and solutions to protect critical assets in OT environments, such as ICS, SCADA, IIoT, PLC, etc.

In this regard there is a basic need for creating professional IT schools around the world that teach the meaning of cyberspace, and not just how to use Word and other simple Office programs.

The expansion and creation of universities and institutes of cyber knowledge is a starting point from which partnerships are launched with organisations seeking to create their own cyber schools or with academic or educational organisations offering cyber training to their students.

Providing comprehensive solutions for IT schools, enables the training of IT professionals and new recruits in all IT roles, so that hackers do not remain the sole repository of digital truth. Advanced training is a solid starting point for organisations seeking to train their IT professionals. Professionals who can manage and master schemes such as Cyber Defender, Cyber Warrior, Cyber Manager, SOC Analyst, Digital Forensics, Basic Training and many others, including through the use of simulation.

Leading the creation and development of the high-level cybersecurity ecosystem is a duty of States towards the citizens who elect their leaders. The same holds true for seeking and employing highly experienced experts in the various security subject matters, including strategic cyber defence, cyber warfare, cyber intelligence, cyber research and development and cyber strategy, as well as defining training policies for these branches of operation.

Having examined the prerequisites for protecting cyberspace, it is worth addressing the structure of some of the risks faced by institutional network systems.

One of the most typical operations made by hackers relates to the use of client/server technology to combine several computers as a platform to launch DDoS (Distributed Denial of Service) attacks against one or more targets, thus exponentially increasing damage.

A malicious user normally uses a stolen account to install the DDoS master programme on a computer. The master programme will communicate with a large number of agents at any given time and the agent programmes have been installed on many computers in the network. The agent launches an attack when it receives an instruction. Using client/server technology, the master control programme can activate hundreds of agent programmes in a matter of seconds.

A DDoS uses a group of controlled machines to launch an attack on a computer, be it server or client. It is so fast and hard to prevent that is therefore more destructive. If we consider that in the past network administrators could adopt the method of filtering IP addresses against DDoS, it becomes more difficult to prevent such actions today. How can measures be taken to respond effectively?

If the user is under attack, defence will be very limited. If there is a catastrophic attack with a large amount of traffic pouring onto the unprepared user, it will very likely that the network will be paralysed before the user can recover. Users, however, can still take the opportunity to seek defence.

Hackers usually launch attacks through many fake IP addresses. At that juncture, if users can distinguish which IPs are real and which are fake – and hence understand from which network segments these IPs come – they can ask the network administrator to change them. Firstly, the PCs should be turned off to try to eliminate the attack. If it is found that these IP addresses are coming from outside rather than from the company’s internal IP, a temporary investigation method can be used to filter these IP addresses on the server or router.

The solution would be to discover the route through which the attackers pass and block them. If hackers launch attacks from certain ports, users can block these ports to prevent intrusion. After the exit port is closed, all computers cannot access the Internet.

A more complex method consists in filtering the Internet Control Message Protocol (ICMP), a service protocol for packet networks transmitting information regarding malfunctioning, monitoring and control information or messages between the various components of a computer network. Although it cannot completely eliminate the intrusion during the attack, filtering the ICMP can effectively prevent the escalation of the aggression and can also reduce the level of constant damage to a certain extent.

The DDoS attack is the most common attack method used by hackers. Some conventional methods of dealing with it are listed below.

1. Filter all RFC1918 IP addresses. The RFC1918 IP address is the address of the internal network, such as 10.0.0.0, 192.168.0.0, 172.16.0.0, etc. These are not fixed IP addresses of a particular network segment, but confidential local IP addresses within the Internet, which should be filtered out. This method serves to filter out a large number of fake internal IPs during an attack, and can also mitigate DDoS attacks.

2. Use many PCs to resist hacker attacks. This is an ideal response phase, if the user has sufficient ability and resources to enable a defence against hackers who attack and continue to access and take over resources. Before the user is fatally attacked, the hacker has little means to control many PCs. This method requires considerable investment and most of the equipment is usually idle, which does not correspond to the actual functioning of the current network of small and medium-sized enterprises.

3. Make full use of network equipment to protect resources. The so-called network equipment refers to load balancing hardware and software such as routers and firewalls, which can effectively protect the network. When the network is attacked, the router is the first to fail, but the other devices have not yet collapsed. The failed router will return to normalcy after being restarted and will restart quickly without any loss. If other servers collapse, their data will be lost and restarting them is a lengthy process. In particular, a company uses load balancing equipment so that when a router is attacked and crashes, the other will work immediately. This minimizes DDoS attacks.  

4. Configure the firewall. The firewall itself can resist DDoS and other attacks. When an attack is discovered, it may be directed to certain sacrificial hosts, which are able to protect the actual host from the attack. The sacrificial hosts may obviously choose to redirect to unimportant hosts or to those having systems with fewer vulnerabilities than some operating systems and with excellent protection against attacks.

5. Filter unnecessary services and ports. Many tools can be used to filter out unnecessary services and ports, i.e. filter out fake IPs on the router. For example, Cisco’s CEF (Cisco Express Forwarding) can compare and filter out Source IP and Routing Table packets. Opening only service ports has become a common practice for many servers. For example, WWW servers open only 80 ports and close all the others or use a blocking strategy on the firewall.

6. Limit SYN/ICMP traffic. The user must configure the maximum SYN/ICMP traffic on the router to limit the maximum bandwidth that SYN/ICMP packets can occupy. Therefore, when there is a large amount of SYN/ICMP traffic exceeding the limit, this means it is not normal network access, but hacking. In the beginning, limiting SYN/ICMP traffic was the best way to prevent DDoS. Although the effect of this method on DDoS is currently not widely used, it can still play a certain role.

7. Scan regularly. Existing network master nodes should be scanned regularly, checked for security vulnerabilities and new vulnerabilities cleaned up promptly. Computers on backbone nodes are the best locations for hackers to use because they have higher bandwidth. It is therefore very important to strengthen the security of these hosts. Furthermore, all computers connected to the major nodes of the network are server-level computers. Hence regular scanning for vulnerabilities becomes even more important.

8. Check the source of the visitor. Use suitable software to check whether the visitor’s IP address is true. This should be done by reverse-searching the router: if it is fake, it will be blocked. As said above, many hacker attacks often use fake IP addresses to confuse users and it is hard to find out from where they come. Therefore, for example, the use of Unicast Reverse Path Forwarding can reduce the occurrence of fake IP addresses and help improve network security.

As seen above, we need experts who know more than hackers, and this is the duty that States and governments have towards their institutions, but primarily towards their citizens.

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