Distributed Denial Of Service (DDOS) is the intentional paralyzing of a computer network by flooding it with data sent simultaneously from many individual computers (so-called zombies) which are used to stage DDOS attacks

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What is an Origin Error Attack?

Similar to my previous question here, however I thought it was best to ask two separate questions rather than combining them into one. From The Forrester Wave™: DDoS Services Providers, Q3 2015 ...
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Azure Based DDOS Mitigation, Azure Based Firewall?

I'd like to mitigate DDOS attacks, for an Azure vm server (just TCP ports 80 and 443). Azure appears to be a great solution. I can't find any Azure documentation, as to if there is an Azure ...
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Mitigate DDos on Windows box

I would love to know, If you know some way to mitigate DDos/Dos attacks on Windows. In Linux we can Mitigate using the IPTables Almighty, but I wonder If there is something like that in Windows. ...
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DDoS Mitigation - Whitelist or Blacklist Incoming Ports?

For a network offering webservices, I have had recommendations to blacklist a couple of common incoming ports, such as UDP 53, to combat the increasing load from DDoS. I'm wondering if it makes more ...
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How can I launch DHCP starvation attack in WLAN?

In WLAN, due to MAC association on Access Point (AP), I can't send the DHCPDISCOVER messages using random MAC addresses. But if I keep my original MAC address as the source ethernet MAC a and random ...
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906 views

cisco asa syn flood detection and response not working

I have a Cisco ASA 5510 (ASA Version 8.3(2)) that has been getting a syn flood attack on it (or more accurately through it - targeting a host behind it) a couple of times a day for the past few days. ...
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How to find which domain in my VPS triggered a DDoS attack with WP xmlrpc

Today, my data center suspended my VPS for DDoS attack reasons. They say one of my clients, that has WordPress website, started a DDOS attack to another websites using xmlrpc. But I don't know which ...
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30 views

iptable ip_conntrack_max testing

I was trying to understand how ip_conntrack_max works so i have created two VM and set ip_conntrack_max to 10000 I used hping to open 10000 udp connection on VM using following command hping --udp ...
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Probabilistic packet marking content ID field

For Above image: All routers are using PPM. What will be the content ID field if 1) R1 = mark packet, R2= Mark packet, R3 = Not mark the packet. 2) R1 = Not mark packet, R2= Mark packet, R3 = Not ...
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42 views

Downloadable Autonomous System contact information

When under (a security) attack, it might be useful for the victim to first identify the source IP, then potentially contact the offending ISP. There seem to be plenty of tools for the part where an IP ...
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DOS attack to increase packets received from a single request?

Is there any attack out there that can be implemented where a single request to a server i host for example responds by sending the same file say 20 times back ? the idea behind the attack is to DOS ...
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Wordpress pingback attack

I am getting Wordpress pingback attach on my server. I tried to put if condition on nginx to block deny all requests that contains "Wordpress" in the header. It works fine but still nginx get millions ...
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What are the most popular DNS amplification attack tools for Windows and Linux?

I would like to test my edge-router firewall rules against some DNS amplification attack traffic. I could run some DNS lookup utility in an endless loop, but maybe there are some dedicated utilities ...
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Deny IP spoof from on ASA destination

on Cisco ASA I am seeing lost of logs like following (127.108.61.90) to 190.93.249.93 on interface inside (127.30.171.61) to 190.93.249.93 on interface inside (127.105.54.108) to 190.93.248.93 on ...
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Options to protect an outbound initiated connection IP?

Consider a service that has 3 separate organizations in a SaaS model. The end user(#1) connects to the first provider(#2) and then initiates a function from within the #2 that connects directly to ...
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Behaviour of DNS query packet

When the configured name server resolver is not reachable, the query packet will retransmitted after certain t times (in windows, every 1 seconds until 8 seconds,max). The behaviour of the legitimate ...
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326 views

Is there any method to prevent/trace ddos attack?

I have a debian linux server which run a few online game services. I have some competitors in this area and i think one of them is behind the ddos attacks. I have full access to the router, so I set ...