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-4
votes
0answers
17 views

How to Protect your site fro Brute Force Attack [closed]

I am facing problem in hosting of Zubidubi.com.In starting website is going quite good but in last days site is blocked by hosting provider.They are saying that your site is using more CPU Usage upto ...
1
vote
1answer
29 views

Ubuntu Nginx after blocking ip address, still showing up in logs

I have a server that keeps trying to brute force hack via xml-rpc post on a wordpress site. I've blocked the ip address in nginx.conf and noticed that I kept getting these errors in the log file, and ...
0
votes
2answers
22 views

Is it possible to use iptables on Ubuntu to limit brute force attacks?

Is it possible to use iptables on Ubuntu to limit brute force attacks for certain URLs? Basically I want to detect where user calls same url over and over again and drop his connection or somehow slow ...
0
votes
0answers
19 views

Server exploited, bruteforcing ssh machines. Exploit keeps coming back [duplicate]

a customer server of ours has been compromised. He was running an centos 5.9 machine, with plesk 11.5 on it. The hack/exploit was located in /var/html/ with files like: gosh.sh and encoded files ...
0
votes
0answers
21 views

Prevent bruteforcelogin attacks from my server [duplicate]

i have received this warning from google that my server has attacked their servers/partners, see the email below Thank you for your follow up! We received an external report for malicious ...
0
votes
0answers
51 views

Monitor outgoing web traffic sources on CentOS [duplicate]

I received a report today that a server I manage (Centos + Apache) is launching a bruteforce attack against wordpress websites: hacked-joomla/brobot The requests sent look like this: x.x.x.x - - ...
-4
votes
2answers
62 views

Where do the Chinese, Russian and etc. random attackers find their targets?

I recently started running a personal site on a dedicated server that i've had for some time, but have never actually used. I have never checked it's logs, but now when i do, auth.log is full with ...
0
votes
1answer
44 views

What are the differences between Fail2Ban and BFD (Brute Force Detection)

I have used both Fail2Ban and BFD, typically I go with Fail2Ban on servers running IPTables, and BFD when servers are running APF. Are there any major differences between these 2 services? What are ...
0
votes
0answers
60 views

mod_evasive: Stop attacks against wp-login.php

i would like to stop attacks against some user's WordPress-installations on my server. This is an example of an attack: 91.208.65.12 - - [20/Oct/2015:10:33:08 +0200] "POST /wp-login.php HTTP/1.0" ...
-2
votes
1answer
77 views

ModSecurity error on wordpress wp-login rules

I have made i ModSecurity rule for apache for cPanel server to protect wordpress, but it have some error, so please suggest me some modification to work it fine. # This has to be global, cannot exist ...
0
votes
0answers
32 views

Strange URL requests via Nginx on Ubuntu 14.04, what is the malicious user trying to do?

A malicious user has been trying to browse to strange URLs that don't exist on my server. One such request turned out to be url encoding: ...
2
votes
3answers
667 views

Remote users attempting to gain access to root mysqld

I have just reviewed my syslog file and notice a TON of entries of the following: Aug 25 13:06:17 ssrv001 mysqld: 150825 13:06:17 [Warning] Access denied for user 'root'@'61.160.232.48' (using ...
-1
votes
1answer
39 views

How can I defend against malicious GET requests? [duplicate]

My server is getting hit with a variety if requests like the following: Started GET "/key/values" ActionController::RoutingError (No route matches [GET] "/key/values") Started GET "/loaded" ...
0
votes
0answers
68 views

Win2008R2: A brute-force attack even though RDP port is not forwarded to the machine

After installing Windows Server 2008 R2 I configured my edge device to forward port 3389 to that host (which only has the internal IP address), which seemed like a great idea until I registered a ...
3
votes
3answers
343 views

How can I combat all of these brute force attacks?

I have 3 dedicated servers, all running WHM/cPanel on CentOS. They're all physically located in Canada. On the newest server, cPHulk started detecting (and blacklisting) failed login attempts. It ...
-1
votes
1answer
47 views

How to prevent password bruteforce in web application? [closed]

I have php web application (nginx+php-fpm). And someone try to bruteforce password. He have a lot of IPs. Also these bruteforce works like DDOS because each time web application starts and try to ...
5
votes
1answer
758 views

Outgoing brute force attacks from my server

One of the servers I look after appears to be participating in brute force attacks against Wordpress installations. I've been on the receiving end of this many times, so am very familiar with steps ...
1
vote
2answers
1k views

How to find source of 4625 Event ID in windows server 2012

I have many audit failure with event ID 4625 and Logon type 3 in my event log. Is this problem form my server(internal services or applications) ? Or this is brute force attack? Finally How can i ...
-2
votes
2answers
87 views

Automicly report brute forcing ip's [closed]

Hosting is awesome. But hackers and bots trying to break into your server are not. I actually hate them. So, today i launched a new server with directadmin. And all is great. But a few minutes after ...
1
vote
1answer
122 views

Exim undergoing distributed dictionary attack

Our web server is currently undergoing a botnet attack on Exim. Our server is CentOS and is setup with BFD (Brute Force detect that uses APF to prevent access) to detect attempts and block them. ...
0
votes
1answer
275 views

CSF not adding IPs to deny file as a cron during high loads

I'm running a cron every minute to thwart brute-force attacks. awk '{print $2}' < ipkill.txt | while read ip; do #query geographical info IP address curl -o country.txt ipinfo.io/$ip ...
-1
votes
2answers
323 views

How to null route a dns zone [closed]

I have a domain that was attacked and flooding the server apache system. The only way to detour the attack is to reroute the dns off the server. Is there a generic IP like "127.0.0.1" that I can use ...
2
votes
1answer
72 views

Incremental Subdomain Brute forcing?

Currently looking after a small varnish/nginx webserver group sitting behind an AWS ELB. Monitoring of the primary domain recently picked up a huge number of hits to non-existent sub-domain ...
3
votes
1answer
929 views

mod_security ruleset for Joomla! admin

I run several hosting servers and recently I have experienced a lot of bruteforce attacks against joomla-based websites. Attackers seem to try a bruteforce against administrator/index.php page. I ...
1
vote
0answers
33 views

Server being hacked with lots of weird process [duplicate]

(I have asked same question at http://superuser.com/questions/841908/server-being-hacked-with-lots-of-weird-process and was told better to ask here, could some admin help delete the post at ...
2
votes
3answers
402 views

Solaris 11 sshd brute force protection. DenyHosts equivalent for Solaris 11

I'm getting regular attempts to brute force ssh on a x86 solaris 11.1 server. On linux I use DenyHosts to block connections after a number of incorrect login attempts. Is there a similar package for ...
0
votes
1answer
432 views

Nginx how to use limit_req_zone on auth_basic to protect against brute force attack?

I have an Nginx server that works as an SSL proxy for a service running on a localhost that doesn't support SSL authentication. I would like to use Nginx's limit_req_zone function to protect the ...
0
votes
1answer
146 views

Brute force attacks with server's IP

I am running a Debian wheezy server with fail2ban installed, everything works as expected but recently my own server got banned. I added the server's IP in the exception row and it seems to work, but ...
0
votes
1answer
137 views

Logging 403 Rewrites for Brute Force Attacks

As explained in Wordpress Codec, I want to prevent brute force attacks for wp-login.php via RewritetRule. http://codex.wordpress.org/Brute_Force_Attacks#Deny_Access_to_No_Referrer_Requests Rather ...
-2
votes
1answer
107 views

Multiple attacks - what can I do

I experience multiple attacks on my server recently (for past several days). Types of these attacks are e.g.: Several SQL Injection methods (select/union/where/null, etc.) Brute force attacks (e.g. ...
0
votes
1answer
156 views

Deal with brute force ftp attack [duplicate]

While Checking the /var/log/secure on my centos server have found lot of attempts of failed login by using unknown usernames, from a list of ip from Japan And China How to hide my server from these ...
0
votes
1answer
666 views

block internal ip brute force attack

Here's someone doing a bruteforce attack on my server for several days now, each time through a different external IP address (hundreds so far) but always through the same I assume local IP address: ...
1
vote
1answer
1k views

htpasswd - Any tip to block brute force attacks?

Update: As Craig suggested I'm trying fail2ban now. Even though I have issues in that as well. failregex is not finding any result though. I had enabled all apache* in jail.local and here is how my ...
3
votes
2answers
249 views

What is the optimum ban duration of a brute force attack?

I use fail2ban to prevent brute force attacks on my production servers. Fail2ban bans an ip after 5 authentication failure and unbans it after 1 hour with my own configuration. I wonder that what is ...
0
votes
2answers
1k views

SSH attacks on Freenas [closed]

I had my freenas box set up using no-ip to forward ssh requests to my machine so that I could get to it from work, friends house, parents, etc. A couple days ago i noticed a large in crease in ...
0
votes
0answers
347 views

Brute force attack on my servers ports burning through bandwidth

Am having some form of brute force attack being done to my server and I have a screenshot of what's happening below. Remote Address 121.14.154.206 is somehow abusing all of my ports and burning ...
8
votes
3answers
14k views

How to stop/prevent SSH bruteforce

I'm very new to network administration, so please regard that I'm not that experienced yet. I have a Ubuntu root server with plesk panel. Yesterday my friends and I noticed that the quality of ...
4
votes
1answer
3k views

User account was locked out from exchange server - how to prevent in future?

I had a bizarre instance this morning and I'm hoping someone can help me shed some light as to what's happened. A user complained about being locked out this morning. After resetting the password, ...
1
vote
1answer
2k views

fail2ban regex working but no action being taken

I have the following snippet of fail2ban configuration on Ubuntu 13.10 server: #jail.conf [apache-getphp] enabled = true port = http,https filter = apache-getphp action = ...
1
vote
1answer
212 views

ldap ppolicy implementation for brute force prevention

I have an openldap server (with user passwords) open worldwide which I'm trying to secure. Step 1 was to limit access to data to authenticated users via ACLs. Step 2, to prevent brute force attacks, ...
2
votes
2answers
2k views

How to stop or prevent Postfix / smtpd / Sasl brute forcing

There are numerous attempts to connect to my mail server in order to send mail either unauthenticated or to guess username and password to, I suppose, accomplish the same. Should I fight against ...
2
votes
0answers
505 views

fail2ban fails to block from auth.log with directadmin

i'm using directadmin on a Ubuntu server. i recently installed Fail2Ban. but i'm still recieving "Brute-Force attack" email from directadmin. my jail.conf (only the auth.log jails!): [ssh] enabled ...
3
votes
1answer
120 views

Ban IP Address on unsuccessful login on Server 2003

I'm regularly under brute force attacks on my Windows Server 2003 with Citrix installed. How can I automatically ban IP addresses that have several unsuccessful login attempts ? This question has ...
1
vote
1answer
190 views

Constant brute force attack on specific email addresses

I have a bit of an issue, this has caught my attention yesterday. Someone or something, a botnet I presume, has been trying to gain access to specific e-mail addresses. The server software keeps ...
0
votes
1answer
186 views

Ubuntu 10.04LTS Server under attack, random reboots UNTIL I blocked China

What could have been sent to my server to cause it to reboot? Details: I have a for-internal-use LAMP server running Ubuntu 10.04LTS (upgrade is scheduled for that nebulous "when I have time"). It ...
5
votes
1answer
5k views

How to Blacklist a Range of IPs in cPHulk Brute Force Attack Settings [closed]

Does anyone know how to define a range of IPs to blacklist in the cPHulk Brute Force attack settings? I am getting bombarded from IPS 103.26.193.* and 103.26.194.* I Googled it and cannot find ...
2
votes
2answers
1k views

What is the difference between /etc/hosts.allow and denyhosts' /var/lib/denyhosts/allowed-hosts?

Put another way, why doesn't denyhosts simply reference /etc/hosts.allow? Why does it have it's own file? Some of the denyhosts tutorials you see instruct the user to add their management IPs to this ...
7
votes
3answers
30k views

What is the source of thousands of 4625 Logon Failure errors with Logon Type 8 (NetworkCleartext)?

I have a Windows Server 2008 R2 system that's showing thousands of 4625 Logon Failure errors with Logon Type 8 (NetworkCleartext) in the Security section of the Windows Logs every single day. There ...
0
votes
1answer
2k views

Do cPHulk Brute Force Protection Settings Effect Hosts? [closed]

Question: Do my settings (shown below) prevent visitors from getting to any of the public web sites on my server if their ISP's IP Address has been blocked/black-listed through cPHulk Brute Force ...
1
vote
1answer
549 views

Apache Error log showing File webdav,wp-login.php does not exist- Possible Attack

Apache Error Log shows the following messages. Seems like an attack to me But not sure what it means. Can anyone tell me what are these attacks and how to prevent any damage from such attacks [Wed ...