Mod_evasive Installation
Feb 25, 2008
We are having problem with installing mod_evasive on our server. We tried installing it on our Virtual Machine that runs Fedora 7 (on our server, we have Fedora core 5), and on Virtual Machine it is fine, we can compile it and put it in our Apache2 conf file.
However, when we try
[root@ mod_evasive]# /usr/local/psa/admin/bin/apxs -i -a -c mod_evasive20.c
on the server, we get a
[root@ mod_evasive]# /usr/local/psa/admin/bin/apxs -i -a -c mod_evasive20.c
gcc -DHARD_SERVER_LIMIT=512 -DDEFAULT_PATH="/usr/local/psa/admin/bin:/bin:/usr/bin" -DLINUX=22 -DTARGET="httpsd" -DHAVE_SET_DUMPABLE -DNO_DBM_REWRITEMAP -DMOD_SSL=208122 -DEAPI -O -pipe -I/usr/include -O3 -fexpensive-optimizations -fstrength-reduce -pipe -DPLESK_Linux -I/home/builder/buildbot/psa-8.2.1-bfc7/build/plesk/lib/dist/include/libxml2 -W -Wall -DPLESK_Linux -I/home/builder/buildbot/psa-8.2.1-bfc7/build/plesk/plesk-utils/include -DBSG_CR -DBSG_MSG -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DHAS_RPM -DUSE_SLEEP_ON_IDLE -Wno-unused-parameter -fpic -DSHARED_MODULE -I/usr/local/psa/admin/include -c mod_evasive20.c ....
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Jun 21, 2007
I know this can be the most foolishly question on WHT but I'm looking for mod_evasive's download link, I tried googling and searching all forums but all links was dead
anybody can give me a link to get mod_evasive ? Ofcourse If you have a better idea than using of mod_evasive I'll be glad to hear
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Oct 14, 2007
We installed mod_evasive and ever since we are getting files like: dos-xxx.xxx.xxx.xxx, where xxx.xxx.xxx.xxx is an IP in our /tmp directory. The contents of the file is usually a 4 or 5 digit number and is owned by apache. Can anyone help me understand what this file is? Is it a product of mod_evasive? Can the files be deleted?
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Mar 24, 2008
I have a file named dos-1.2.13.4 (i changed the IP address in purpose) inside the log and inside the file there is a 4 digit number that is constantly changing. more
[root@myserver]# more dos-1.2.13.4
8726
What is 8726?
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Apr 2, 2007
I have 2 questions here.
1. I have installed mod_evasive version 1.10.1 on a Cent OS 4.4 server.
I'm using the test.pl script that comes with mod_evasive to test the configuration and when running the script from the same server mod_Evasive is installed. The mod_evasive is able to detect the intrusion and block the IP of the server.
If I use the same test.pl script from an external server the requests come in and are viewable in the access log but mod_evasive doesnt block the IP of the external server. Probably is not blocing the ip of the external server because of latency.
Is there a way to modify the test.pl script to make it more agressive and get results when testing from an external server?
Here I'm pasting the code of the test.pl script:
Code:
#!/usr/bin/perl
# test.pl: small script to test mod_dosevasive's effectiveness
use IO::Socket;
use strict;
for(0..100) {
my($response);
my($SOCKET) = new IO::Socket::INET( Proto => "tcp",
PeerAddr=> "test.domain.tld:80");
if (! defined $SOCKET) { die $!; }
print $SOCKET "GET /?$_ HTTP/1.0
";
$response = <$SOCKET>;
print $response;
close($SOCKET);
}
2. Also, I have sendmail installed and on the mod_evasive config I have email address specified on DOSEmailNotify. When testing from the internal server with the test.pl script the server is able to block the ip, put in the hash table but it never sends an email to my email address.
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Mar 30, 2007
mod_evasive settings?
I cant find out the setting which would ban all bad IPs and will nto ban normal ones.
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Apr 1, 2007
Does anyone know any good mod_evasive rules that pick up DoS, but not many false positives? Just looking to see what works for everyone out there, been having trouble.
Or if there is better apache module to combat DoS.
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Mar 25, 2009
i want to install mod on my centos Cpanel server. so i try:
cd /usr/local/src
wget mod_evasive_1.10.1.tar.gz
tar -zxf mod_evasive_1.10.1.tar.gz
cd mod_evasive
/usr/sbin/apxs -cia mod_evasive20.c
but when i run /usr/sbin/apxs -cia mod_evasive20.c there is some error for me :
[root@ mod_evasive]#/usr/sbin/apxs -cia mod_evasive20.c
-bash: /usr/sbin/apxs: No such file or directory
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Nov 27, 2008
and is it good to install or not?[url]
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Apr 10, 2007
I have 2 questions here.
1. I have installed mod_evasive version 1.10.1 on a Cent OS 4.4 server.
I'm using the test.pl script that comes with mod_evasive to test the configuration and when running the script from the same server mod_Evasive is installed. The mod_evasive is able to detect the intrusion and block the IP of the server.
If I use the same test.pl script from an external server the requests come in and are viewable in the access log but mod_evasive doesnt block the IP of the external server.
Probably is not blocing the ip of the external server because of latency.
Is there a way to modify the test.pl script to make it more agressive and get results when testing from an external server?
Here I'm pasting the code of the test.pl script:
Quote:
#!/usr/bin/perl
# test.pl: small script to test mod_dosevasive's effectiveness
use IO:ocket;
use strict;
for(0..100) {
my($response);
my($SOCKET) = new IO:ocket::INET( Proto => "tcp",
PeerAddr=> "test.domain.tld:80");
if (! defined $SOCKET) { die $!; }
print $SOCKET "GET /?$_ HTTP/1.0
";
$response = <$SOCKET>;
print $response;
close($SOCKET);
}
2. Also, I have sendmail installed and on the mod_evasive config I have email address specified on DOSEmailNotify. When testing from the internal server with the test.pl script the server is able to block the ip, put in the hash table but it never sends an email to my email address.
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Jul 30, 2007
Can I turn off mod_evasive in .htaccess or does it have to be done server wide only in httpd.conf?
Or if not, is there a way I can exclude a specific account from it?
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Apr 27, 2007
I got mod_evasive installed and its working fine. Its detecting the IPs, blocking the IPs and sending me the emails.
The emails I'm getting only have the sender name "Apache" and the content shows the IP address is blocking.
How can I enhance the email report to display the following:
1) get a proper Subject header in the email
2) change the From header to include the hostname - i.e.
apache@web.domain.tld
3) have the program do a reverse lookup on the ip, and include that in the body.
Do I need to include a script using the DOSSystemCommand to do this?
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Apr 11, 2007
I have 2 questions here.
1. I have installed mod_evasive version 1.10.1 on a Cent OS 4.4 server.
I'm using the test.pl script that comes with mod_evasive to test the configuration and when running the script from the same server mod_Evasive is installed. The mod_evasive is able to detect the intrusion and block the IP of the server.
If I use the same test.pl script from an external server the requests come in and are viewable in the access log but mod_evasive doesnt block the IP of the external server. Probably is not blocing the ip of the external server because of latency.
Is there a way to modify the test.pl script to make it more agressive and get results when testing from an external server?
Here I'm pasting the code of the test.pl script:
Quote:
#!/usr/bin/perl
# test.pl: small script to test mod_dosevasive's effectiveness
use IO:Socket;
use strict;
for(0..100) {
my($response);
my($SOCKET) = new IO:Socket::INET( Proto => "tcp",
PeerAddr=> "test.domain.tld:80");
if (! defined $SOCKET) { die $!; }
print $SOCKET "GET /?$_ HTTP/1.0
";
$response = <$SOCKET>;
print $response;
close($SOCKET);
}
2. Also, I have sendmail installed and on the mod_evasive config I have email address specified on DOSEmailNotify. When testing from the internal server with the test.pl script the server is able to block the ip, put in the hash table but it never sends an email to my email address.
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Oct 26, 2007
Is there a way to block ips with mod_evasive by adding the ips to the mod_evasive configuration file?
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Jul 9, 2007
Some times I read in logs
server mod_evasive[24203]: Blacklisting address 84.255.151.xxx: possible attack.
Where can I find this black list and all IP listed
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May 5, 2008
Installing mod_evasive after serveral attacks on our server.
but when restarting httpd I get this error,
httpd: Syntax error on line 36 of /usr/local/apache/conf/httpd.conf: API module structure 'evasive20_module' in file /usr/lib/httpd/modules/mod_evasive20.so is garbled - expected signature 41503232 but saw 41503230 - perhaps this is not an Apache module DSO, or was compiled for a different Apache version?
Running apache 2.2.8
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Jun 23, 2008
I would like to install the Mod_evasive for Apache 2.0 on RHEL 4 Server(Cpanel Installed). I downloaded the Mod_evasive source and extracted and used the following command.
# cd mod_evasive
# /usr/sbin/apxs -cia mod_evasive20.c
I am getting folowing message.
-bash: /usr/sbin/apxs: No such file or directory
# whereis apxs
apxs:
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Feb 6, 2008
We tried to use one software for offline browsing to download our site and test it if it will fail or not. We used 500 threads at once. Program was able to request 56 pages per second. Of course server (site) failed because there were no more available mysql connections. So site went down. Mod_evasive didn't block that.
Here is the config:
<IfModule mod_evasive20.c>
DOSHashTableSize 3097
DOSPageCount 2
DOSSiteCount 80
DOSPageInterval 1
DOSSiteInterval 1
DOSBlockingPeriod 30
DOSLogDir "/var/log/httpd"
</IfModule>
Here is the copy of text I found on one site about mod_evasive:
Mod_evasive does work relatively well for small to medium sized brute force or HTTP level DoS attacks. There is, however, an important limitation that mod_evasive has that you should be aware of. The mod_evasive module is not as good as it could be because it does not use shared memory in Apache to keep information about previous requests persistent. Instead, the information is kept with each child process or thread. Other Apache children that are then spawned know nothing about abuse against one of them. When a child serves the maximum number of requests and dies, the DoS information goes with it. So, what does this mean? This means that if an attacker sends their HTTP DoS requests and they do not use HTTP Keep-Alives, then Apache will spawn a new child process for every request and it will never trigger the mod_evasive thresholds. This is not good…
Is there any solution for such type of attack with Keep Alive disabled?
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Dec 10, 2007
mod_evasive bans some of the legit users (galleries , typo3 etc.) with following settings:
<IfModule mod_dosevasive20.c>
DOSHashTableSize 3097
DOSPageCount 10
DOSSiteCount 150
DOSPageInterval 1
DOSSiteInterval 3
DOSBlockingPeriod 10
</IfModule>
Somebody have an idea for some less restrictive but still usefull rules?
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Mar 12, 2008
The server gets around 25k unique visitors per day, but one website in particular allows hotlinking and uses a lot of bandwidth. Last time I checked...according to whm apache status page, I was getting 180 requests per second. Not sure what time it was though. So it might be higher at a different time of the day.
Recently got mod_evasive installed, but I didn't want it to block out legitimate users. Currently it's set to this...
<IfModule mod_evasive20.c>
DOSHashTableSize 3097
DOSPageCount 5
DOSSiteCount 100
DOSPageInterval 2
DOSSiteInterval 2
DOSBlockingPeriod 10
DOSBlockingPeriod 600
</IfModule>
what a better configuration would be? When I run the log I already see it block out a bunch of IP's. I don't want to lose any visitors to this program, but I do get ddos a lot.
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Oct 24, 2007
I just started using lighttpd for download purpose.
I limited the number of connection per ip to 5 using mod_evasive .
When a user is downloading with a download manager the number of connection is reached to its maximum. I was wondering if there is a way to allow that same user to be able have 1 additional connection when an index.php is requested . That is, if the user is trying to view an index.php file it would ignore the rule evasive.max-conns-per-ip = 5 .
Each user have their download dir located on [url] in that same dir contains an index.php which contains login tab and integrated directory listing .
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Jul 26, 2007
how to install mod_security, suhosin, Mod_Evasive on server plesk (apache2, php5)?
win I loacate apxs I have empty results
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May 26, 2007
I have just started working through the book Build Your Own Database Driven Website Using PHP & MYSQL, and in the installation section I am required to find a file called php5isapi.dll for the IIS, but I have downloaded the latest version of PHP - PHP 5.2.2 and I cannot find this file...
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Dec 26, 2007
I got the following message after creating my test php script. Can someone explain what
I need to change? I am computer literate, but no techie!
<p>This PHP CGI binary was compiled with force-cgi-redirect enabled. This
means that a page will only be served up if the REDIRECT_STATUS CGI variable is
set, e.g. via an Apache Action directive.</p>
<p>For more information as to <i>why</i> this behaviour exists, see the <a href=[url]>manual page for CGI security</a>.</p>
<p>For more information about changing this behaviour or re-enabling this webserver,
consult the installation file that came with this distribution, or visit
<a href="[url]
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Apr 19, 2009
I was wondering if there was anyone out there that could do an ffmpeg, flvtool2, mencoder installation on my CentOS 5.2 VPS for $10. I need it to be able to run phpmotion / youtube clone scripts...
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Oct 26, 2009
I purchased an EV SSL Cert, and all is fine. Installed via cPanel, and I get the green address bar in Firefox, but not in IE.
Comodo (the vendor) have an Auto-Enhancer feature which automatically tells IE to give me a green bar. They state in their FAQ the following instructions to install the feature:
Replace the bundle file that is in use for the web site.
Use the 'SSLCertificateChainFile' directive instead of the 'SSLCACertificateFile'/'SSLCACertificatePath' directives.
I have download a .CA-BUNDLE file from them.
Please tell me, now what do I do? I am at a lost at their instuctions, and going by my dealings with them, I think I can get help from you guys more accurately and quickly.
The server runs WHM/cPanel 11 with Apache 2 with mod_ssl. Full root access, but I am a Linux newbie.
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May 26, 2009
anyone has got the steps to install this on centos 5? I have got it for centos 4 but censtos 5 having issues
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libxslt.so: undefined reference to `xmlXPathContextSetCache'
collect2: ld returned 1 exit status
make[3]: *** [icecast] Error 1
make[3]: Leaving directory `/usr/src/redhat/BUILD/icecast-2.3.1/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/usr/src/redhat/BUILD/icecast-2.3.1/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/src/redhat/BUILD/icecast-2.3.1'
make: *** [all] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.1366 (%build)
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Feb 18, 2009
What do people mean by profesional installation, for example if I have a forum professionally installed could I expect this to be with phpmyadmin and apache and the mod_rewrite, or are these more custom aspects?
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Jun 19, 2009
I need to install a video script on my server and for this I need following addons on my server, how I can install these...
# mbstring [url]
# FFmpeg [url]
# Mplayer + Mencoder [url]
# Flvtool2 [url]
# Libogg + Libvorbis [url]
# LAME MP3 Encoder ([url]
I am using linux server with CPanel.
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Jun 18, 2009
I have installed nagios 3.06 on my centos server. Anybody know the steps to configure this nagios to check my other servrers.
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Mar 8, 2009
I have WAMP 2.0 installed on my Windows Vista. WAMP has released a new version: 2.0G. I've just downloaded it and i'm wondering if i could just run the installer or do i have to uninstall my current WAMP and then only install the latest version?
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