Changing the settings

If someone has blocked you from accessing the domain roblox.com you can try a couple things. Try accessing the secure version of the site:
https://www.roblox.com/Landing/Animated

If that doesn't work, try using a proxy service. This will work unless your administrator has blocked access to the proxy service:

https://proxy.org/

Facebook has become an integral part of many people's daily lives by keeping them connected to friends and family, which can make not being able to get on the site quite frustrating. Facebook does experience occasional downtime and other issues, but if you're consistently having problems accessing it, a browsing filter, firewall or outdated software could be the culprit.

Browser Requirements:
You may have problems accessing Facebook if you haven't upgraded your Internet browser in awhile. As of 2011, Facebook recommends using Internet Explorer 8, Firefox 3 or Safari 4 for the best user experience. Updates to these browsers are free and can be found at the companies' websites. Some older computers may not be able to run the latest browser version and, therefore, have trouble displaying Facebook and other sites correctly.

Home Blocks:
Home computers also have tools to block certain websites; parents often install them to keep kids' Web activity under control. If this is your situation, you will have to talk to Mom and Dad about unblocking Facebook for you. If you have a PC with multiple user accounts, the "admin" is often the only account with permission to install or uninstall filtering software and extensions; you'll need to be logged into this account to change a filter's settings
.
Firewalls:
Many computers and their antivirus programs now enable firewalls by default. Firewalls help protect your computer from malicious viruses and software, but sometimes they block access to sites you legitimately want to access. If you suspect your firewall is limiting your Facebook access, check the settings in Windows' Control Panel or in the program that enables the firewall, such as your antivirus software or wireless router software. Making the settings more permissible could solve the problem.

Facebook has become an integral part of many people's daily lives by keeping them connected to friends and family, which can make not being able to get on the site quite frustrating. Facebook does experience occasional downtime and other issues, but if you're consistently having problems accessing it, a browsing filter, firewall or outdated software could be the culprit.

Browser Requirements:
You may have problems accessing Facebook if you haven't upgraded your Internet browser in awhile. As of 2011, Facebook recommends using Internet Explorer 8, Firefox 3 or Safari 4 for the best user experience. Updates to these browsers are free and can be found at the companies' websites. Some older computers may not be able to run the latest browser version and, therefore, have trouble displaying Facebook and other sites correctly.

Home Blocks:
Home computers also have tools to block certain websites; parents often install them to keep kids' Web activity under control. If this is your situation, you will have to talk to Mom and Dad about unblocking Facebook for you. If you have a PC with multiple user accounts, the "admin" is often the only account with permission to install or uninstall filtering software and extensions; you'll need to be logged into this account to change a filter's settings
.
Firewalls:
Many computers and their antivirus programs now enable firewalls by default. Firewalls help protect your computer from malicious viruses and software, but sometimes they block access to sites you legitimately want to access. If you suspect your firewall is limiting your Facebook access, check the settings in Windows' Control Panel or in the program that enables the firewall, such as your antivirus software or wireless router software. Making the settings more permissible could solve the problem.

Facebook has become an integral part of many people's daily lives by keeping them connected to friends and family, which can make not being able to get on the site quite frustrating. Facebook does experience occasional downtime and other issues, but if you're consistently having problems accessing it, a browsing filter, firewall or outdated software could be the culprit.

Browser Requirements:
You may have problems accessing Facebook if you haven't upgraded your Internet browser in awhile. As of 2011, Facebook recommends using Internet Explorer 8, Firefox 3 or Safari 4 for the best user experience. Updates to these browsers are free and can be found at the companies' websites. Some older computers may not be able to run the latest browser version and, therefore, have trouble displaying Facebook and other sites correctly.

Home Blocks:
Home computers also have tools to block certain websites; parents often install them to keep kids' Web activity under control. If this is your situation, you will have to talk to Mom and Dad about unblocking Facebook for you. If you have a PC with multiple user accounts, the "admin" is often the only account with permission to install or uninstall filtering software and extensions; you'll need to be logged into this account to change a filter's settings
.
Firewalls:
Many computers and their antivirus programs now enable firewalls by default. Firewalls help protect your computer from malicious viruses and software, but sometimes they block access to sites you legitimately want to access. If you suspect your firewall is limiting your Facebook access, check the settings in Windows' Control Panel or in the program that enables the firewall, such as your antivirus software or wireless router software. Making the settings more permissible could solve the problem.

Facebook has become an integral part of many people's daily lives by keeping them connected to friends and family, which can make not being able to get on the site quite frustrating. Facebook does experience occasional downtime and other issues, but if you're consistently having problems accessing it, a browsing filter, firewall or outdated software could be the culprit.

Browser Requirements:
You may have problems accessing Facebook if you haven't upgraded your Internet browser in awhile. As of 2011, Facebook recommends using Internet Explorer 8, Firefox 3 or Safari 4 for the best user experience. Updates to these browsers are free and can be found at the companies' websites. Some older computers may not be able to run the latest browser version and, therefore, have trouble displaying Facebook and other sites correctly.

Home Blocks:
Home computers also have tools to block certain websites; parents often install them to keep kids' Web activity under control. If this is your situation, you will have to talk to Mom and Dad about unblocking Facebook for you. If you have a PC with multiple user accounts, the "admin" is often the only account with permission to install or uninstall filtering software and extensions; you'll need to be logged into this account to change a filter's settings
.
Firewalls:
Many computers and their antivirus programs now enable firewalls by default. Firewalls help protect your computer from malicious viruses and software, but sometimes they block access to sites you legitimately want to access. If you suspect your firewall is limiting your Facebook access, check the settings in Windows' Control Panel or in the program that enables the firewall, such as your antivirus software or wireless router software. Making the settings more permissible could solve the problem.

I hope you find it very helpful. Thank you for using fixya.

Facebook has become an integral part of many people's daily lives by keeping them connected to friends and family, which can make not being able to get on the site quite frustrating. Facebook does experience occasional downtime and other issues, but if you're consistently having problems accessing it, a browsing filter, firewall or outdated software could be the culprit.

Browser Requirements:
You may have problems accessing Facebook if you haven't upgraded your Internet browser in awhile. As of 2011, Facebook recommends using Internet Explorer 8, Firefox 3 or Safari 4 for the best user experience. Updates to these browsers are free and can be found at the companies' websites. Some older computers may not be able to run the latest browser version and, therefore, have trouble displaying Facebook and other sites correctly.

Home Blocks:
Home computers also have tools to block certain websites; parents often install them to keep kids' Web activity under control. If this is your situation, you will have to talk to Mom and Dad about unblocking Facebook for you. If you have a PC with multiple user accounts, the "admin" is often the only account with permission to install or uninstall filtering software and extensions; you'll need to be logged into this account to change a filter's settings
.
Firewalls:
Many computers and their antivirus programs now enable firewalls by default. Firewalls help protect your computer from malicious viruses and software, but sometimes they block access to sites you legitimately want to access. If you suspect your firewall is limiting your Facebook access, check the settings in Windows' Control Panel or in the program that enables the firewall, such as your antivirus software or wireless router software. Making the settings more permissible could solve the problem.

I am assuming that you are accessing the internet in a public location with a network connection that isn't yours or you are trying to access United States content from a foreign country.

If you are on a public network that has blocked youtube, you can consider websites below to unblock the proxy settings and access the website again:

http://www.silversurf.info/

http://unblockyoutube.com/

Simply copy and paste the URL address you are trying to access in the dialogue box and click "SURF!"

if the place is your home your accessing internet from then try making sure the site is allowed through internet explorer. this can be done in the options page from the top menu. if your accessing internet from another area the issue could be with that site being blocked from the access point itself, for example most schools block all social sites

Try accessing those sites using this webpage http://www.surf24h.com/ .
The school cannot block at home. If the sites are blocked then it must be under your parents control. Talk to them and see.
PLEASE follow the rules !

are you accessing it in the office or at home? If in the office or workplace, maybe the site is blocked by your IT guy or system administrator. Or if your accessing it at home, you can contact your ISP and asked them if there is no problem with their server. You can check if the site you are accessing is blocked or there is a problem by your isp by doing the trace route option in the command prompt of your pc. Example: tracert facebook.com, if there is a delay in the trace route result or there is an error, there is a big possiblity that there is a problem with your ISP.