Overblocking occurs when a single website containing some form of adult or explicit content is blocked by its IP address. If this happens, all other sites hosted on that IP address, regardless of their content, will be blocked as well. Unfortunately, research has indicated that it is not atypical for a single web server to host a mixture of sites that are sexually explicit and sites that are not. Overblocking is a problem known to affect filtering in China, Vietnam, Saudi Arabia, and other countries that employ government-mandated country-wide web filtering policies.
Additionally, research has indicated that IP address filtering is used by many commercial web filters installed in libraries and schools in the United States. Sometimes Internet services providers are legally required to implement IP address level filtering. For example, under law, the Attorney General of Pennsylvania ordered Internet service providers in Pennsylvania to disable access to sites found to offer child pornography.
Most providers receiving such orders reportedly use router-level filtering to disable access to the affected IP addresses, even though those IP addresses host scores of additional web sites without child pornography. Solution To avoid any of the potential problems related with IP address sharing, it is best to acquire a unique IP address for your web site. Contact your web host and tell them you would like your own unique IP address.
Be sure to let them know you would like a fresh IP address, not a recycled one. Web hosts will often reuse IP addresses that spammers have previously blacklisted. You may need to speak with several individuals until you can find a technician who can understand your request. The tool currently does not support sites only using IPv6 addresses. All rights reserved. Last 10 Test Results.
Test Done. Test Result Link. Find IP Address. New Test. Sign Up and Monitor. Result URL :. Check Website Availability. Ping Website. DNS Analysis. Find Location. Connect Time taken to setup the between connection Site24x7 and website. First Byte The time spent waiting for the web server to send data. Last Byte The time at which the entire content of the file is downloaded.
Handshake Time The time taken to complete the handshake. Check website availability. Unable to check. Please try again later! Domain Blacklist check Results:. IP Blacklist check Results:. Blacklists IP Address. Want to be sure you are not blacklisted? One may work while the other fails, and it may take a while to notice otherwise. A website may have multiple IP addresses or just one. You get a link to your result that you can send or post anywhere.
If a check fails, Uptrends tests again from another checkpoint right away. If the second test fails, Uptrends alerting lets you know. Uptrends has checkpoints for you to use for your testing.
Checking from your users' locations is crucial for effective DNS monitoring. A website IP address issue is devastating to your business. Uptrends rechecks every error from another checkpoint location before sounding the alarm. Based on your alert definitions, you can escalate the alerting as the error condition continues. You can change the contact method or who gets notified and continue to send reminders until the problem gets fixed.
Get the picture Say cheese! If possible, our uptime monitors grab a browser selfie at the time of the error. An error screenshot is often a great clue when investigating availability problems. Uptrends has checkpoints on the ground in cities and towns all around the world. You can choose to test from some or all of them when you automate your checks. Uptrends' scheduled reporting gives you website data whenever you want it delivered to your inbox. Uptrends' custom dashboards give you the ability to generate charts and tables showing you the metrics that matter to you.
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