I have a website that offers web stats. It receives like 30 million hits per day (legitimate) in addition to a large number of invalid URL requests and DOS attacks that max at 50MB. I currently have a server at liquidweb who, after bearing too much with me, informed me that I might have to move away some day because the attacks are affecting their network. I have been with them for 4 years now.
We tried using a normal firewall but it couldn't handle the normal requests. I don't have a budget to afford an expensive one. Firewall tweaking is not easy because of the large number of legitimate requests.
So, my questions are:
1. What should I do? Is there a known, affordable firewall that can help (or any other setting)?
2. Which hosting company will take me and manage to make things work without getting their network affected?
I am running a SQL test server here that is piping HUGE amounts of data for a test project I am running.
Approximately 30 queries a second - constantly. That's over 2.5M queries a day -- so we are talking big (I think?)
I am currently running this test on a
AMD Phenom 9300, 4GB RAM - SATA 500GB HDD and I am running MySQL 5.0.51a i386 on CentOS
I have programmed a process control for our applications purpose - basically it controls the launching of our SQL intense applications, and stops launching when the Load is greater than 2.5
I have plans to optimize the number of queries (I will build in a cache to some of the applications - and run INSERT statements all together) however I am looking for SQL tweaks that will improve performance. Would running the 64bit version work better?
I just wanted to know that could we track or are able to know the actual email address of the user that hits on our website or is this possible from the provider / host to know?
I just looked into some of the services like -
Trace Email Domain Look up Trace IP
But somehow it does not full fill my above query. Or it is not at all possible to track email addresses directly ?
I'm currently hosting my wordpress blog with dreamhost (yuck). It recieves 2000 unique visitors a day, which amounts to about 10,000 page hits per day. Storage is around 2Gb at the moment and monthly usage is about 20Gb however both are likely to increase.
Please suggest what sort of hosting and a provider for me? Budget is pretty much anything (within reason). I would prefer not to spend more than $25 a month but can if the consensus is for something a little bigger. Reliability is important to me so I don't want the site to be down coz I was asleep when the server went down.
I have a drupal based site. The front page is about 200kb and I have 10 trimmed topics in front page. Currently the site is hosted on a shared server. My question is how many hits or page loads per hour/minute should I have before it would be necessary to switch to a dedicated server?
We've got a client who is using both AWstats and Webalizer and they are claiming the numbers are different between the two and that the numbers reported are not accurate. They need a specific list on how many impressions they are getting on a daily, weekly and monthly time period for advertisers.
I'm sure that i have Trojans and Viruses on my Server but every time i contacted My Company they ask me to pay money and then they will check and scan my server
so is it any Free application which can scan and remove all bad files on my Server? i'm looking for free applications to scan the whole server
My server stop responding, I couldn't access via webmin or ssh, and DNS were not responding, so I have to ask for a reboot and now everything is fine.
Looking at the logs I found this:
Code: Jul 18 19:23:12 server sshd[18484]: Failed password for root from 61.145.196.117 port 56817 ssh2 Jul 18 19:23:12 server sshd[18485]: Failed password for root from 61.145.196.117 port 60227 ssh2 Jul 18 19:23:13 server sshd[18488]: Failed password for root from 61.145.196.117 port 38038 ssh2 Jul 18 19:23:15 server sshd[18493]: Failed password for root from 61.145.196.117 port 49884 ssh2 Jul 18 19:24:30 server sshd[18497]: Failed password for root from 61.145.196.117 port 37929 ssh2 Jul 18 19:25:06 server sshd[18521]: Did not receive identification string from 61.145.196.117 Jul 18 19:25:09 server sshd[18508]: Did not receive identification string from 61.145.196.117 Jul 18 19:25:14 server sshd[18505]: fatal: Timeout before authentication for UNKNOWN Jul 18 19:26:00 server sshd[18509]: Did not receive identification string from 61.145.196.117 And searching that IP on google I found it here: http://www.tcc.edu.tw/netbase/net/in...?fun=240&prd=3
And is flagged as a SSH Attack.
Any ideas why my server stopped working? and how to prevent it?
My site currently in prolong HTTP flood attack since 2 weeks ago. The attack was never stop and for this moment i could only mitigate the attack using my own firewall (hardware).
Since my ISP is not interested to help from upstream, even provide any mitigation services, i could only doing mitigation on my own source or using proxy services alternatively as well, but i've chose to tried on my own. I've tried once on one of well-known mitigation services out there but it seems not fully satisfied me since most of legitimate traffic is blocked from their source.
What i could do now is keep staying alive as well as will not going down on whatever situation becomes worst (but if the attack change to udp attack, i couldn't help myself coz there must be high incoming bandwidth into my network). My network is totaling 10MB last time but since this attack i've been forced to subscribe for 30MB in order to keep balance on the attack.
I've blocked all access except for my country and some other neighbours. If i change policy to allow all countries, the load of firewall will become max and after that hang will hang in less than a minute. I've done load balancing of 4 servers (8GB memory each one) and it seems the condition is getting under control with slight problem of server hang (memory shortage) and very limited keep alive connection.
Now what am i thinking is to buy a router objectively to null route incoming specific IP of countries so i can change my firewall policy to allow all connections as well as to help the firewall itself release its burden halting blocked IP that currently keep hitting itself that could might impact its performance.
Which brands of router is possible doing this thing?
Do you have some other suggestions instead of buying router?
i am just having one issue in one of my highly visited website hangibar.com, its being hosted in softlayer, we are facing synattack too much in this website.
the solution which microsoft given in their website related with tcp/ip registry entry but thing is same , some where and some connections become increases too much over tcp/ip. due to that reason website become very sticky and it stop functioning the execution of sql process, during this issue i have to restart the server to establish a fresh connection.
When i tried to view this http://gihkus.com/Lnx.txt it seems to be attack on my server. http://gihkus.com/Lnx.txt is not hosted by us. I have disabled perl support on all domains hosted on our server but still we are under attack. There is nothing special in /tmp.
Over the past day one of my servers has seen a huge rise in incomming traffic (from normal web requests to a constant 4Mbit/s, peaking upto 80Mbit/s). My outgoing traffic has remained at its normal profile, so I am pretty sure that these are not web requests, and it does not seem to be having an adverse effect on the server (the site still runs perfectly well and quick and load is still less than 1).
However, I am unsure as to how to identify what this traffic is? Are there any easy ways to tell on a FreeBSD server what the source and type of incomming traffic is? I have tried playing with netstat, but an not getting anything useful - I would like to see which ports are involved.
Am Really suffering here for ddos attack ( apache - pop3 ) every week my server under attack am using APF but now am really wanna get red from it am looking for a powerfull firewall I do not know if CSF Could stop this attack like limiting receiving SYN from an ip or any other policy another thing . i have get this rules from forums but am really weak at iptables rules so can any one help my if these rules useful or not . against Dos attack:
iptables -t nat -N syn-flood iptables -t nat -A syn-flood -m limit --limit 12/s --limit-burst 24 -j RETURN iptables -t nat -A syn-flood -j DROP iptables -t nat -A PREROUTING -i eth0 -d (dest ip) -p tcp --syn -j syn-flood
I have a windows server, and today it has a large inbound traffic, so I tried to disable all web service, and after that, the result of netstat -an shows no connection at all, but the server still has large inbound traffic,
i had installed anti ddos or firewall,but those are useless.His attacks are such great that The server and all the vps are down now. One told me that I should check the ips and receive ips. The attacker is so skillful .describe the best method to defeat him. Be sides the attacker use diffirenet ips in each attack,I block him by iptables but no use…. His attack occupy all the ram and I have to resetart the server… Now this time his attack lead to shutting all the vps down
My website is under ddos attack from some competitors. I don't know yet how big is the attack. The ips of the ddos attack come from all the world.
I have contacted a few hosting companies specialised in ddos proof hosting, unfortunatly the price is so expensive that i cannot afford it.
So i try to find another solution : my website is only aimed to the french people, so maybe is it possible to install a kind of firewall or proxy located before the server to block all the incoming IP adress not from france ? Do you know some websites who can do this and the price ?
I already try do deny the non-french ip in one htaccess file but the ddos attack saturate the server anyway.
We are currently experiencing an SYN Flood attack on our primary production server and are looking for some help in resolving the issue.
Running: Novell SUSE Linux Enterprise Server 10.2-64 SuperMicro X7DBR-E Intel Xeon QuadCore DualProc SATA [2Proc] Processor Intel Xeon-Clovertown 5320L-QuadCore [1.86GHz] 8GB Memory @ Softlayer DC in Texas.
Need help within the next hour or two. Please ask any necessary follow up questions and how you might go about resolving the issue (i.e. SYN Cookies, etc.)
It's literally thousands of those requests overloading apache. The server is fine, the load average is like .8. But none of the website are loading.
We're hosting with ThePlanet, and they're doing a great job at blocking a huge portion of the attack. But we're still getting hit pretty hard. I've got APF installed, and 3 or 4 anti-dos scripts.
Every once in a while a page will load for the websites, I think we've got just under 50 legit connections.
In addition, please send us any source files of the attack.
Please let us know if you have any questions or need further assistance. We appreciate your cooperation.
RSA Anti-Fraud Command Center RSA, The Security Division of EMC "
I look at subdomains...and I dont have any, I look at .htaccess nothing, look at 404 page, nothing..also look at template files and no any iframe or similar?
