How to install:

Install Net::HTTP, and copy the shell script to a suitable location.

#!/usr/bin/perl  -w
#
# Program: HTTP Ping <http-ping.pl>
#
# Author: Matty < matty91 at gmail dot com >
#
# Current Version: 1.1
#
# Revision History:
#
# Version 1.1
#     Added checks for arguments
#
# Purpose:
#  Reports latency between a web server and a given host
#
# License:
#   This program is free software; you can redistribute it and/or modify it
#   under the terms of the GNU General Public License as published by the
#   Free Software Foundation; either version 2, or (at your option) any
#   later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software
#   Foundation, 59 Temple Place – Suite 330, Boston, MA 02111-1307, USA.
#
# Usage
#  Usage: http-ping.pl [ -s server ] [ -p port ] [ -d delay ] [ -u uri ] [ -h ]
#
# Example:
#  ./http-ping.pl -s www.fastmonitoring.com -p 80 -d 5 -u /index.html
#   Querying HTTP server www.fastmonitoring.com:80 every 5 seconds (Ctrl-C to stop):
#      Mon Nov 29 18:09:59 2004: TCP Connection Time=0.052s HTTP GET Time=0.051s [Normal Delay]
#      Mon Nov 29 18:10:04 2004: TCP Connection Time=0.036s HTTP GET Time=0.052s [Normal Delay]
#      Mon Nov 29 18:10:09 2004: TCP Connection Time=0.034s HTTP GET Time=0.052s [Normal Delay]

use Net::HTTP;
use Time::HiRes qw (time);
use Getopt::Std;

############################
# Globals                  #
############################
my $httpConnection = 0;
my $content = 0;
my $buffer = 0;
my $buffer_size = 8192;
my $excessive_delay = 1;

####################################
# Get the parameters from the user #
####################################
%options=();
getopts(“d:hp:s:u:”,\%options);

my $delay = defined($options{d}) ? $options{d} : 10;
my $port = defined($options{p}) ? $options{p} : 80;
my $server = defined($options{s}) ? $options{s} : “localhost”;
my $uri = defined($options{u}) ? $options{u} : “/”;

if (defined $options{h} ) {
printf(“Usage: http-ping.pl [ -s server ] [ -p port ] [ -d delay ] [ -u uri ] [ -h ]\n”);
exit(1);
}

#######################################
# Let the user know what we are doing #
#######################################

printf(“Issuing GET request for $uri on HTTP server $server:$port every $delay seconds (Ctrl-C to stop):\n”);

#############################
# Connect to server         #
#############################
while (1) {
# Calculate the time it takes to establish a TCP connection ( SYN, SYN/ACK, ACK )
my $start = time();
my $httpConnection = Net::HTTP->new( Host => $server )
|| die $@;
my $tcpConnectionTime = time() – $start;

# Calculate the time it takes to GET / and process it
$start = time();

$httpConnection->write_request(GET => “$uri”, “User-Agent” => “MTY/1.0.5f”);

while (  $content =  $httpConnection->read_entity_body($buffer, $buffer_size) ) {
}
my $httpConnectionTime = time() – $start;

if ( ($tcpConnectionTime > $excessive_delay) || ( $httpConnectionTime > $excessive_delay))  {
my $dt = scalar localtime time;
printf(“  %s: TCP Connection Time=%.3fs HTTP GET Time=%.3fs [Excessive Delay]\n”,$dt, $tcpConnectionTime, $httpConnectionTime);
} else {
my $dt = scalar localtime time;
printf(“  %s: TCP Connection Time=%.3fs HTTP GET Time=%.3fs [Normal Delay]\n”,$dt, $tcpConnectionTime, $httpConnectionTime);
}

sleep($delay);
}

That’s it. Enjoy!

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The submission form and additional information is available at http://www.dotcom-monitor.com/website-performance-award.asp.

In today’s Internet-driven economy websites have become the leading source for knowledge and information for most businesses and consumers. With millions of websites in existence, it has never been more important for organizations to establish their website as a credible, high performance operation. The Dotcom-Monitor All-Star Website Performance Award program was created to help each participant’s website stand out from the crowd with a stamp of prestige signifying world-class excellence from the industry’s leading global authority on website performance monitoring and reliability.

How it Works

The Dotcom-Monitor All-Star Website Performance Award is the IP industry’s most prestigious award for website availability as it holds participants to the highest known standards of uptime/performance excellence.
- each month during program participation, nominated companies will automatically receive the appropriate award logo based on their website’s composite performance score over the course of the month
- the website administrator must copy a few lines of HTML code into the appropriate page on their website for the award logo to automatically appear
- three awards designations and associated logos are available based on website availability;
* 5-star “Best of Industry” for > 98% availability
* 4 star “Outstanding” for > 95% availability
* 3-star “Standard of Excellence” for > 90%
* websites with < 90% availability do not receive an award for that month
- Sites that receive the highest average score within a given industry category are also awarded a “Best of Industry” Dotcom-Monitor All-Star Performance Award logo for their promotional purposes, as well as inclusion in a press release sent to major media
- all websites will initially receive a 4-star logo during the first 2 weeks of participation to allow time for accurate performance data collection
- there is a $100/month fee to participate in the program, which is designed to minimize the participation of low-quality websites and to help offset the cost of the competition.

“Websites today have taken on a role of almost Herculean importance in most organizations, as a highly visible symbol of the company’s brand, marketing, service quality, reliability, customer service, and operational integrity,” said Vadim Mazo, founder and chief technology officer of Dotcom-Monitor. “While there are myriad industry award programs that reward website design, the Dotcom-Monitor All-Star Website Performance Award program is setting the industry standard for website performance, reliability and quality, giving organizations a highly credible stamp of approval for their website, and for all that is represents.”

The consultations can be done real time with experts from every field answering to all your queries. It provides access to schedule appointments wherever internet is available. The best thing about online appointments is that you need not have to install software’s which contain loads of add ware and spy ware. All your data and reports are stored online so that your freed from carrying your appointment Scheduling software book. The critical factor here is the fee is paid as an annual membership and not as per user charges, so enables multiple users to access from anywhere. The online appointment is also compatible with different operating systems like Windows, UNIX and Linux .And works well with all known browsers.

In accordance with the official press-release,

‘Dotcom-Monitor’s free website monitoring Uptime Meter tool provides customers a unique, easy-to-use, targeted solution for quickly monitoring and validating uptime that affects website performance and revenues. The Uptime Meter is designed to aggregate uptime and automatically update and display the results on the user’s website via the Uptime Meter Button. The Uptime Meter Button displays accurate update metrics, such as “Uptime 99.999%”, based on the aggregated data since the date of original implementation.’

More details can be found here: Dotcom-Monitor’s Uptime Meter.

(http://www.dotcom-monitor.com/StampEdit.aspx)

Installing a firewall may help to protect your network, however this will work only if the firewall is properly configured. Let’s see what are the main principles of firewall configuration.

1. Protect your system
A firewall is only a part of your protection. Start with disabling unused accounts and close unnecessary ports on PCs.

2. The easier the better
Before adding any rules to your firewall software, define the principles, on which your security will be based on. It is a good idea to remove all the default rules that a firewall has upon the installation and start from the very beginning, adding your own rules one by one.

3. Strict security means Strict security
Your network should have only allowed traffic. Everything that’s not allowed, must be disallowed. Start with disallowing all the traffic by default and then allow it only for the services that really need it.

4. Monitor your outbound traffic
Usually people think that they only need protection from external threats. But it’s also important to monitor your outbound traffic. This will help you avoid situations when your servers are used as zombie computers within a botnet.

5. Firewall is only a part of Security

Don’t think that if you have a firewall installed, you are safe enough to forget about other components of security. Don’t forget to update your anti-virus, don’t visit the sites that Firefox filters off and be careful at sites that ask for any of personal information except for your name and email number.

When it comes to online business data mining is an important part of the research department. By conducting online surveys, companies collect the valuable data from consumers and use it to improve their services or to survive the competition. There are online survey companies that conduct such surveys and get paid for it. If you part take in the surveys, it is possible to get a fraction of the sum at times depending on your luck.

However, there are companies that offer genuine rewards for every survey you complete successfully. Usually these companies award points for each completed survey and lets you redeem the points after you reach the limit set by the company. But this doesn’t mean that you can get a bagful. You need to spend long hours filling out forms only to get a cheap gift or discount on merchandise.

Although professionals may find it funny, it is a good start for the beginners. Most of the surveys can be completed within 15 minutes and require no special skills to participate. Only thing the participant has to do is ensure that the company he works for is genuine, and this can be easily found out through customer reviews about the survey software offer in the internet. The best thing about these online surveys is that it improves the skills of a novice internet entrepreneur aspiring to earn online money. It acts as a motivating program for beginners to enter in to larger ventures in the future.

The first method is external load/stress testing – great solution for commercial projects. But there is also another good way for Apache – it’s open-source and free, called ApacheBench. It’s incredibly easy to use:

#ab -c10 -n3000 http://www.fastmonitoring.com/

• ab the name of the program
• C10 means the number of threads
• n3000 is the number of requests.

The program has a great variety of additional parameters — just check the official documentation. You can use cookies, POST requests, modified headers — everything that will help to simulate server users activity.

The program output is quite comprehensive:

Document Path:          /
Document Length:        121779 bytes
Concurrency Level:      10
Time taken for tests:   211.255212 seconds
Complete requests:      3000
Failed requests:        0
Write errors:           0
Total transferred:      63177000 bytes
HTML transferred:       63171000 bytes
Requests per second:    10.41 [#/sec] (mean)
Time per request:       480.425 [ms] (mean)
Time per request:       96.085 [ms] (mean, across all concurrent requests)
Transfer rate:          226.23 [Kbytes/sec] received
Connection Times (ms)
min  mean[+/-sd] median   max
Connect:        0    0   0.5      0      19
Processing:   181  479 186.0    444    1822
Waiting:      166  461 184.7    427    1708
Total:        181  479 186.0    444    1822
Percentage of the requests served within a certain time (ms)
50%    444
66%    525
75%    577
80%    619
90%    732
95%    819
98%    946
99%   1012
100%   1822 (longest request)

Highly recommended.

The switch to IPv6 is on. In June 2008, the U.S. federal government, which is arguably the world’s largest single enterprise, required that all its executive agencies add IPv6 to their network backbones. The European Commission recently set an IPv6 target adoption rate of 25 percent by 2010, and the chairman of the Asia Pacific Network Information Centre predicted that all IPv4 addresses will be depleted by 2011, forcing wide-scale IPv6 adoption. A number of Internet powerhouses, such as Google and Alta Vista, have now deployed IPv6 accessible websites. Operating systems, such as the latest versions of Microsoft Windows, include IPv6 support.

IPv6 will become the essential backbone protocol for next-generation networking. IPv6 boasts improved network reliability, lower costs and improved security in addition to its vastly expanded addressing and routing capabilities (achieved by increasing the address length from 32 to 128 bits). While the benefits of IPv6 are apparent, performance management will becomes inherently more difficult as a single IPv6 subnet is as large as the entire Internet today.

As with IPv4, IPv6 quality of service is implemented at Layer 2 and Layer 3 of the TCP/IP stack. A number of network management vendors support IPv6, but while passive network management tools may comply with the new version, some may not include the evolving set of features for IPv6 support. Alone, passive monitoring may be unable to properly detect performance issues experienced by the end user, and for web-enabled businesses, the end user experience is the most critical element of service quality.

For business and organizations deploying IPv6 websites, performance management and service-level agreement monitoring become more complicated due to the coexistence of IPv4 and IPv6, the exponential size of IPv6 addressing and routing, and the lack of a killer application to drive wide-scale and accelerated deployment.

IPV6 and IPv4 headers are not interoperable. IPv4 is a best-effort service where all packets are treated equally; IPv6 implements quality-of-service (QOS) by classifying IP packets using an 8-bit traffic class field and a 20-bit flow label field in the header. While IPv6 web sites can be accessed using dual stacks, tunneling and protocol translation, native IPv6 performance monitoring is essential to determine whether performance issues are originating in the end-to-end IPv6 environment. Companies that have deployed IPv6 websites must utilize native IPv6 performance monitoring to isolate service-level agreement (SLA) issues for these sites as IPv4 monitoring alone will not help isolate IPv6 QoS issues.

There are several reasons to actively monitor IPv6 websites in a native environment:

• Because there’s a gap between IPv6 capabilities and current network management tools, active monitoring is essential.
• As with any new technology, there is the potential for flaws, which may impact uptime and performance.
• Pv6 will lead to larger networks that directly address more network devices, increasing the overall complexity.
• IPv6 end-to-end security features, while improving security, will make it harder to analyze network traffic.

Dotcom-Monitor has deployed a native IPv6 monitoring bureau to offer end-to-end IPv6 performance monitoring for QOS and SLA management from the end-user perspective. With active web site monitoring using native IPv6, companies deploying IPv6 website can ensure that SLAs are being met specific to IPv6 performance. End-to-end IPv6 performance monitoring is crucial to maximize the return on investment of the deployment and to understand its effects on the IT operations and the business.

Dotcom-Monitor provides extensive real-time reporting using graphical charts that explain success/failure rates for specific performance checks, response/download times, uptime/downtime, load variations by hour/day/week and much more. For e-commerce sites, Dotcom-Monitor will measure quality of service for each phase of the transaction process as well as performance comparisons among different geographic areas. Dotcom-Monitor provides instantaneous notification of website and web application performance issues, based on customer configured notification and escalation parameters.

About Dotcom-Monitor:

Dotcom-Monitor is the leader and innovator in advanced website performance monitoring services. Founded in 1998, Dotcom-Monitor has saved over 3,000 companies money by insuring maximum website uptime — at a cost up to 50 percent less than other web site monitoring services.

The first threat is virus attacks. Virus infection may lead to disastrous consequences: data leakage, destruction of all the information, server software destruction or just server blocking caused by inability to process all the incoming requests. On the most famous example of the latter case was root DNS servers attack in October, 2002. This attack resulted in freezing of 7 root servers (there were 13 overall), and all the Internet operation got under the threat of stopping. The attack was performed by data flood: 13 servers containing information about top-level domains (.com, .org, etc.) were flooded with ICMP packets. When the attack was over, experts said that if it had continued for more than 10 hours, the Internet users would have seen significant Internet slowdown and then even suspension of work.

Why the root DNS attack may have such serious consequences? The reason is the hierarchical structure of DNS servers. The first request goes to the local server. If the requested domain name cannot be found, the request goes further, to a higher-level server. Requests usually reach the root servers when new domain names appear on the Net. Furthermore, every record on DNS servers has a limited time to live (TTL), and when a record has expired, the server sends a request to a DNS server of a higher level. Since new domain names are added daily, the information on lower-level servers gets outdated. This explains why if root servers are disabled, Internet will work for a while but then will stop.

The second threat is false DNS servers. This phenomenon has been developed by malefactors. The malefactors may pursue different objects, the gist is always the same: to make a real server work in a wrong way or block it. The victims of such attacks are DNS servers as well as end users. If a malefactor succeeds in providing a host with counterfeit DNS information, the host will send data to a counterfeit IP address. At the best the end user won’t be able to surf Internet or use Internet services. At worst, the confidential data from the host may be sent to a malefactor’s server.

How can one protect DNS servers from remote attacks? Of course, absolute protection does not exist, but possible effect may be diminished. Of of the options is implementation of authentication and integrity of the information kept in DNS. To solve this problem on Internet the DNS system has been extended (extensions are called DNSSEC and are described in RFC-2535, RFC-2536, RFC-2537, RFC-2541, and RFC-3008). The main idea of DNSSEC is applying a digital signature to transferred data. To develop this concept, IETF created DNSSEC Working Group. Using DNSSEC doesn’t require a private key from the recipient, and this allows walking round the unsolvable problem of distribution of the private key among all the existing DNS servers on the Internet. It also helps to get rid of the problem of providing secure DNS traffic. However there is a price for the security – significant increase of the database for every zone and enhanced requirements for server CPU, which is required to perform encryption/decryption operations.

Another alternative is using special hardware and software. They include:

• Network traffic cipherer
• Hardware and software firewalls
• Secure network crypto-protocols
• IDS – Intrusion Detection Systems
• Software for security analysis
• Secure network OS

Whatever method or combination of methods a network administrator chooses, it is extremely important to monitor DNS servers for uptime and security holes. One of the easiest ways to be aware of a DNS server is hosted DNS monitoring service, which is offered by some commercial companies.

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