Cisco! Trying To Produce Lantencies For Testing

Jul 16, 2009

What I am trying to do is two controled tests.

1) Introduce a 250ms latency on a network from a source IP only.

2) Introduce a 5000ms latency on a network from a source IP only.

Optionally I would go for introducing the latency to all inbound, outbound traffic without the source IP restriction.

Network layout is as follows.

Cisco ASA5550/VPN Module Firewall with two

4506 switches behind it, one for Public VLAN one for Internal VLAN, multiple hosts connected to each switch both Windows and Linux.

Is there a way to introduce these latencies for testing purposes by some sort of Firewall or switch configuration?

I know I can use Cisco's NIST Net WAN emulation software but that is per host and would prefer to do this accross the entire network at one time.

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Here I'm pasting the code of the test.pl script:

Code:
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# test.pl: small script to test mod_dosevasive's effectiveness

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use strict;

for(0..100) {
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";
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I have 2 questions here.

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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.

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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($response);
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";
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close($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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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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