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204 views

Protection against scrapping with nginx

This morning we had a crawler going nuts on our server hitting our site almost 100 times per second. We'd like to add a protection for this. I guess I'' have to use HttpLimitReqModule but I don't ...
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1answer
110 views

Stange stream of HTTP GET requests in apache logs, from amazon ec2 instances

I just had a look at my apache logs, and I see a lot of very similar requests: GET / HTTP/1.1 User-Agent: curl/7.24.0 (i386-redhat-linux-gnu) libcurl/7.24.0 \ NSS/3.13.5.0 zlib/1.2.5 libidn/1.18 ...
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1answer
119 views

How shared hosted web servers deal with spam (flood) attacks?

I want to know how shared webhosting or other types of it deal with Spam issues. Example: stop serving the website for a period of time, and how much is it? ...
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0answers
46 views

Network flooded with LLC packet

Recently my network has been slow. From Tcpdump i found lot of frame with protocol LLC. A complete packet capture can been here tcpdump result Any hints on interpreting these packet?
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0answers
49 views

GET /wpad.dat entries flooding my access_log

I have a small LAN of some 30 users in it with proxy auto configuration enabled and working. Two of them are requesting wpad.dat file too rapidly at a pace of 30 times per second. 10.1.14.246 - - ...
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0answers
32 views

Floodlight :too many hosts displayed

I have 2 openvswitch switches to whom are attached 2 devices per switch leading to 4 overall devices. However, when I start floodlight web ui and go to "topology" section it displays me a lot of ...
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0answers
120 views

HP network discovery service flooding network with SLP / SRVLOC requests

I am having trouble with "HP Network discovery service" which I think is responsible for flooding my network with SLP/SRVLOC requests. This has happened on multiple occasions on different devices ...
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0answers
44 views

My site looks to be encoutering flooding, what should I do?

I'm recieving too many requests to my site that the CPU usage is always exceeding the limit and the site gets suspended. I tried blocking the IP range that most requests are coming from (a Chinese ...
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443 views

Prevent from UDP flood

How should I prevent from UDP flood attacks? My ISP don't wan't to block those attacks. So all I can do is block this using IPTABLES, I'm using Debian 5.0. I heard that if there is not maany IP ...