Denial of service (DoS)/(DoS) attack
Heuristic analysis
|
Anti-relay
|
Botnet / Zombie
|
Bounce
|
Dane
|
Denial of service - DDOS
|
DKIM
|
DMARC
|
DNSSEC
|
False-negatives
|
False positives
|
Bayesian filters
|
FOVI - President's scam
|
FQDN
|
Greylisting
|
Social Engineering
|
White lists
|
DNSBl blacklists
|
Malware
|
MTA / MDA
|
Opt-in
|
Opt-out
|
Ransomware
|
Scam / Nigerian419
|
Phishing
|
SMTP
|
Spam
|
Spear phishing
|
SPF
|
StartTLS
|
Virus
|
Teergrubing
|
Turing test
|
Definition of DDoS
DDoS stands for Distributed Denial of Service. It’s a computer attack designed to render a service or website inaccessible by saturating the network or server with large amounts of traffic from multiple sources.
What’s the difference between DoS and DDoS?
The main difference between DoS and DDoS lies in the fact that DoS stands for Denial of Service and refers to an attack emanating from a single source, whereas DDoS (Distributed Denial of Service) involves the use of multiple sources to carry out the attack.
Denial of Service (DoS) is an attack aimed at rendering a computer application incapable of responding to user requests. Mail servers can fall victim to this type of attack. Distributed Denial of Service (DDoS) is a DoS attack emanating from several distinct origins. This type of attack is extremely complex to block, as it is often impossible to differentiate between a real request and a DDoS request. The DDos attack very often uses a multitude of zombie PCs infected with backdoors, remotely exploited by a hacker and simultaneously attacking a single target.
How does Denial of Service work?
A Denial of Service attack works by overwhelming a server or network with illegitimate traffic, so that legitimate requests cannot be processed. This can be achieved using a multitude of techniques, such as sending useless packets, overloading the network or exploiting vulnerabilities in software.
How is a DoS attack triggered?
A DoS attack can be triggered in a number of ways, for example by exploiting a security hole in the system, sending a large number of requests to a server or flooding a network with data packets.
How can you tell if you’ve been DDoS’d?
Signs of a DDoS attack include network slowdowns, slow response times and service outages. System administrators can also use network monitoring tools to detect DDoS attacks.
What is the risk for a company under DDoS attack?
DDoS attacks can lead to loss of revenue, reduced customer satisfaction and damage to the company’s reputation. What’s more, DDoS attacks can sometimes serve as a diversion for other, more dangerous types of computer attack.
Which attacks are considered DDoS?
Attacks that are considered denial-of-service attacks include SYN flood attacks, Ping of Death attacks, Smurf attacks, UDP flood attacks and DNS amplification attacks, among others.
Altospam Mailsafe applications
ALTOSPAM incorporates specific rules to prevent denial-of-service attacks. For example, the number of simultaneous connections from the same IP address is limited. What’s more, ALTOSPAM’s front-end position in your SMTP architecture prevents your server from falling victim.
Would you like to strengthen your e-mail security?
Security starts in your mailbox. We offer a free 15-day analysis of your mailbox.
