How can I block my competitor's IP address range from my website?

Are you looking for free network tools to find an IP address range? This advice from our security expert shows you whois tools available to you and then explains how to block these ranges from viewing your Web resources, in this expert response.

Michael Gregg, Superior Solutions, Inc.

I'm having a problem with a local competitor and need to get his IP address or possibly the range he is using so that I can exclude his IP/IPs from seeing my web site. I'm sure he is on a wireless network and should be able to take a laptop within range. How do I get this info? I've looked all over to see if there is software that will easily do this but have come up blank. Packet sniffing programs don't seem to do it either.

There are several ways to get this information. Let's explore one method here: You could start by pinging the domain name, i.e., ping DomainName.com. You can also use any number of who is tools, such as Robtex.com's Domain Name Server records, or SamSpade.org's tool. This should provide domain information and the IP address of the server.

The next step would be to take a look at one of the regional RIR's (Regional Internet Registry). The RIR's are...

Step 2 of 2:

You forgot to provide an Email Address.

This email address doesn’t appear to be valid.

This email address is already registered. Please login.

You have exceeded the maximum character limit.

Please provide a Corporate E-mail Address.
- I agree to TechTarget’s Terms of Use, Privacy Policy, and the transfer of my information to the United States for processing to provide me with relevant information as described in our Privacy Policy.
Please check the box if you want to proceed.
- I agree to my information being processed by TechTarget and its Partners to contact me via phone, email, or other means regarding information relevant to my professional interests. I may unsubscribe at any time.
Please check the box if you want to proceed.

the organizations overseeing the allocation and registration of Internet number resources within a particular region of the world. For the US, the site to review is www.ARIN.net -- the American Registry for Internet Numbers (ARIN). You will need to enter the IP address of the organization's Web server. Look over the results as there should be a sub net mask provided and a range.

While this will provide you the information needed to block your competitors IP address range they could always use a proxy, such as TOR, to get around this restriction.

This was last published in November 2008

Dig Deeper on Network Security Monitoring and Analysis

All
News
Get Started
Evaluate
Manage
Problem Solve

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

Meet all of our Networking experts

View all Networking questions and answers

Find network security vulnerabilities by assessing risk

Integrate endpoint management systems for better security

Juniper Security Director helped by Cyphort analytics

Cisco tracks growing role of machine learning, AI in cybersecurity

Integrate endpoint management systems for better security

Juniper Security Director helped by Cyphort analytics

Cisco tracks growing role of machine learning, AI in cybersecurity

What are the top information security objectives for CISOs?

Dynamic ARP Inspection (DAI)

darknet

What is data loss prevention? -- An introduction to DLP

SYN scanning

Aligning IT with business still a struggle for enterprises

New network visibility tools create legacy and clarity issues

How to leverage UDP port scanning as a security scanning tool

Pervasive security is needed to protect modern networks

How can zero-day attack prevention be improved?

How to cut false security, malware alerts in hybrid cloud

Enlightened shadow IT policy collaborates with users

How to understand modern network security threats

Find network security vulnerabilities by assessing risk

Using unified security management to reduce sprawl of security tools

Combatting network threats: Look, Ma, no firewall!

Networking blogs: The evolution of network access control

Please create a username to comment.

How IT can help prevent UC tool communication overload

CPaaS trends reflect expanded vendor offerings

Cisco enhances Webex Teams meetings, expands PBX support

Deploy kiosk devices with the Managed Home Screen Android app

New Outlook features appeal to users on the go

Smartphone market trends elicit longer refresh cycles

Microsoft quantum development turns toward hardware

Top 5 options for Linux certifications

New hardware, use cases shape server benchmarking needs

CPaaS market could boost partners with the right skills

Cisco CX sees greater formalization at partner summit

Cybersecurity puts managed services industry at a crossroads

Dig Deeper on Network Security Monitoring and Analysis

Related Q&A from Michael Gregg

Have a question for an expert?

Join the conversation

1 comment

Register

Login

Forgot your password?

Your password has been sent to:

Please create a username to comment.