Os ataques DDoS são uma das principais ameaças à segurança da informação.
Esses ataques são realizados por meio de um grande número de solicitações de conexão a um servidor, de forma a sobrecarregá-lo e impedir que ele responda às solicitações legítimas.
Neste artigo, você vai aprender o que é um ataque DDoS, como ele é executado e como se proteger dessa ameaça.
O que é um ataque DDoS?
Um ataque DDoS (distributed denial-of-service) é um ataque cibernético em que um grande número de computadores maliciosos são utilizados por um hacker ou grupo de hackers para tentar bloquear o acesso a uma determinada página na Internet, ou mesmo todo o serviço.Os ataques DDoS podem ser realizados a partir de um único computador ou de milhares de computadores infectados (bots).
Apesar de não ser ilegal, os ataques DDoS podem ser classificados como crimes cibernéticos, uma vez que podem danificar os sistemas atacados, interromper serviços e afetar a economia.
Eles são considerados uma ameaça crescente à segurança da informação e à estabilidade dos negócios na Internet. Os ataques DDoS estão se tornando cada vez mais comuns e específicos.
Como os ataques DDoS são executados?
DDoS é um ataque à rede que infiltra uma quantidade significativa de tráfego malicioso em uma determinada rota, de forma a torná-la inutilizável.
Os ataques DDoS podem ser executados de diversas formas, cada uma com objetivos específicos.
Formas
Estas atividades podem ser executadas de duas formas: ataque de negação de serviço ou ataque de saturação.
No ataque de negação de serviço, o objetivo é tornar a rede inutilizável para os usuários legítimos.
Já no ataque de saturação, o objetivo é sobrecarregar os servidores da rede, de forma a impedir que os usuários realizem qualquer operação.
Métodos
Os ataques DDoS podem ser executados por meio de diversos métodos, como os ataques SYN Flood, Ping of Death e DoS. No ataque SYN Flood, o atacante envia uma série de pacotes SYN para o servidor, de forma a saturar a capacidade do mesmo.
No ataque Ping of Death, o atacante envia um pacote com um tamanho muito maior do que o permitido, de forma a sobrecarregar o servidor. Já no ataque DoS, o atacante envia uma série de pacotes com dados errados ao servidor, de forma a prejudicar a sua operação.
Dispositivos
Os ataques DDoS podem ser executados por meio de diversos dispositivos, como os botnets, os servidores proxy e os roteadores.
Os botnets são redes de computadores infectados por um vírus que permite ao atacante controlá-los remotamente.
Os servidores proxy são servidores de terceiros que são utilizados para enviar os pacotes dos atacantes para a rede alvo.Já os roteadores são dispositivos que redirecionam o tráfego de uma rede para outra.
Objetivos
Os ataques DDoS podem ter diversos objetivos, como prejudicar ou derrubar um serviço, colocar um site fora do ar, roubar informações por meio da captura de dados ou do furto de informações confidenciais, entre tantos outros objetivos.
Por que os ataques DDoS são perigosos
Ataques DDoS são cada vez mais comuns na internet. Mas será que eles são verdadeiramente perigosos?
Essa é uma questão que ainda gera muita controvérsia. Alguns defendem que os ataques DDoS podem ser extremamente perigosos, pois podem interromper serviços essenciais e prejudicar a economia.
Já outros acreditam que os ataques DDoS não passam de ameaças vazias e que não podem gerar danos reais às empresas.
Entre os principais objetivos dos ataques DDoS estão a interrupção do serviço, a obtenção de informações confidenciais e o roubo de dados. De acordo com o Tecnoblog, os ataques DDoS podem ser realizados de duas maneiras:
– Ataques de negação de serviço (DoS): Neste tipo de ataque, os hackers tentam sobrecarregar um servidor com uma grande quantidade de solicitações, de modo que ele fica incapaz de atender as requisições normais.
– Ataques de saturação (DDoS): Neste tipo de ataque, os hackers tentam enviar uma quantidade muito grande de dados para um servidor, de modo que ele fica incapaz de processar as requisições normalmente.
Os ataques DDoS são cada vez mais utilizados por criminosos para prejudicar as empresas.
Por isso, é importante que as empresas estejam preparadas para lidar com esses ataques.
Algumas medidas que podem ser tomadas para proteger as empresas dos ataques DDoS são:
– Implementar uma solução anti-DDoS adequada;
– Ter um plano de contingência para lidar com possíveis ataques DDoS;
– Manter os servidores protegidos com senhas e firewalls;
– Manter os sistemas atualizados;
– Armazenar os dados em locais seguros.
Como se proteger de um ataque DDoS?
Não existe uma solução única para se proteger de um ataque DDoS, mas existem várias medidas que podem ser adotadas:
Existem diversas maneiras de se proteger contra um ataque DDoS.
A primeira é contratar um provedor de serviços de segurança cibernética que possua ferramentas adequadas para detectar e bloquear ataques desse tipo.
Outra é usar o programa de segurança adequado em seu computador ou dispositivo móvel, que vai filtrar os pedidos de conexão de forma a identificar e bloquear os ataques DDoS.
Outras ações
- Atualize o software de segurança em seus computadores;
- Mantenha seus computadores protegidos por senhas fortes;
- Instale um firewall para impedir acessos não autorizados aos seus computadores;
- Mantenha seus computadores livres de vírus e outras ameaças virtuais;
- Não abra arquivos ou e-mails suspeitos;
- Cuidado com as redes sociais – não clique em links suspeitos e não divulgue informações pessoais;
- Tenha backup de seus dados importantes.
Conclusão
Os ataques DDoS estão se tornando cada vez mais comuns e devastadores. Por isso, é fundamental estar sempre atualizado sobre essa ameaça e saber como se proteger. A 7inCloud oferece uma solução completa para proteger sua empresa contra ataques DDoS, com o objetivo de manter suas operações online sempre seguras e protegidas.
Quer se manter atualizado sobre os principais riscos cibernéticos da atualidade e sobre as melhores tecnologias para segurança da informação e cloud computing? Assine nossa newsletter.
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Третья, но не менее важная категория — промокоды без депозита. Подобное предложение — истинный клад для экономных игроков. Использовав эту комбинацию, вы автоматически зачисляете себе определенную сумму или фриспины без единого вложения. Однако здесь есть нюанс: почти в 99% случаев кешаут с бездепозитного бонуса ограничен небольшой суммой. Плюс ко всему, вейджер на бездепе часто ставят x50–x100. Тем не менее, это идеальный способ познакомиться с площадкой на виртуальные, а не реальные деньги.
Следует четко осознавать, что далеко не все промокоды одинаково полезны. Промокоды за регистрацию обычно предлагают небольшие поощрения, однако для них не нужен депозит. Бонусы на пополнение требуют вложений, однако и величина вознаграждения серьезнее. Что касается кодов без депозита — это прекрасный старт для новичков, но не ждите от них миллионных выплат. Прежде чем использовать промокод обязательно читайте правила конкретной площадки. Разные операторы понимают базовые требования неодинаково.
Обсудим временные рамки. У каждого промокода обладает ограниченным периодом действия. Приветственные коды часто живут дольше — до месяца. Бонусы за внесение средств могут быть привязаны к конкретной дате. Самые короткие по сроку — промокоды без пополнения, которые обычно валидны всего один день с момента получения. Более того, после ввода кода вам дается конкретный период для прокрутки бонусных средств. Как правило, от 72 часов до двух недель. Просрочили хотя бы одно условие — игрок теряет и подарок, и профит. Следовательно, используйте планировщик задач и отслеживайте прогресс отыгрыша.