0
votes
0answers
151 views

Linux message: Possible SYN flooding on port 25. Sending cookies

I have a Linux CentOS server online. At my console this message appeared: possible possible SYN flooding on port 25. Sending cookies. See SYN flood and SYN cookies. I have done an Apache JMeter ...
1
vote
0answers
28 views

A lot of random NAT tables appear

My brothers Mac seems to be infected. It keeps on sending UDP and SYN floods to our router, and it multiplies my ping 10 times.When I look in the NAT Mapping table there are a lot of random address ...
1
vote
0answers
26 views

Block packets by size in Windows

currently I am receiving an attack against one of my services running on Windows Server 2008 R2 with malicious UDP packets all of a specific length. I have tried dropping these packets with a plugin ...
0
votes
1answer
63 views

Can Torrent/DHT network remember my IP?

I suspect that my torrent activity casted some sort of "natural" DDOS attack on me. I had UPnP configured and each time I was starting uTorrent client, it was generating new random port and was ...
1
vote
2answers
97 views

Can a home user behind a firewall be targetted by a DDoS attack?

I've read about an attack that targets simple home computer users who are playing online poker: Players A and B join a real money 1 on 1 tournament. You cannot unregister from this tournament and if ...
1
vote
2answers
140 views

Why is preventing DDoS so hard? [closed]

I was thinking, if a DDoS attack can come in 2 ways: Sending large packets. Sending many packets. Why don't network administrators limit IP connections, to let's say 3 users/IP's and set a limit ...
1
vote
1answer
1k views

Wireless router lods reporting loads of DoS attack attempts

We're having intermittent connectivity issues with our ADSL at the office. We've been dealing with our ISP for weeks and they don't know how to fix our problem. What happens is that at multiple times ...
1
vote
1answer
167 views

DDOSED, Static IP but ISP says dynamic

I'm having a problem, sometime I'm getting ddosed for no reason (I verified with commview,wireshark). The first time I noticed I didn't think it was a problem because I was pretty sure my ip was ...
0
votes
1answer
216 views

MacBook Air gets added to Watchguard XTM-21W Appliance's Blocked Site List?

We have this issue where one of our MacBook Air (Mountain Lion) users is periodically getting added to the Blocked Sites list within our Watchguard XTM-21 Appliance (XTM21-W). Couple of questions: ...
2
votes
1answer
198 views

Is it a DOS or DDOS if the attacking computers are on the same network

I'm currently doing a reflective report (reviewing someone else's work) for uni and the report is about DDOS. For the report the author carried out a DOS attack on a web server using computers that ...
13
votes
1answer
523 views

How come sites like Google/Facebook/etc. don't get DDOS'd even though they receive so many requests?

Something I don't understand: (Tens/hundreds of?) thousands of people simultaneously try to connect to a site like facebook.com or google.com. From what I understand, they must all necessarily ...