[League Of Legends] - "We're unable to log you in because you may be offline"

If you're having issues logging into League of Legends, this article will help you troubleshoot them. If you're getting an error that is related to your username or password, you should consider recovering your account instead. The issue could be caused by your computer rejecting the security certificates from our servers. Our client relies on a particular browser depending on your client; Internet Explorer for Windows and Safari for Mac. These browsers must be configured regardless of your default browser, so be sure to make all suggested changes within each browser.

If you're using Windows, the Hextech Repair Tool can resolve a few common issues that may prevent you from logging on.

CHECK THE SELECTED REGION IN THE CLIENT

NO, REALLY!
This is a very simple thing to overlook, especially when you are rushing to jump into Summoner's Rift. After clicking on the League of Legends icon (but before hitting Play!), check the region that you are logging into in the top right corner of the window. You have to login into the region where you currently have your account, since any given account can only be active in one region at a time.

CHECK IF THE SERVER IS UP

Before performing any troubleshooting steps, it's worth checking the current status of the League of Legends server that you are trying to connect to. The links below will take you to the Server Status forum for each region:

North America
Brazil
Turkey
EU West
EU Nordic & East
Russia
Latin America North
Latin America South
Oceania
Japan

SYNCING WINDOWS CLOCK

If your Windows Clock is out of sync with real time, it will not provide our servers with correctly timestamped certificates. This could affect connectivity to the League of Legends servers, Store or matches. In order to avoid those issues, please follow the solutions shown below:

SYNCING YOUR CLOCK MANUALLY
Right-click on your computer's clock and choose Adjust Date/Time.
Select the Internet Time tab, and click the Change Settings button.
At this point you may receive a UAC prompt. After this prompt, click the Update now button to resync.

IF THE ABOVE STEPS DIDN'T WORK, PLEASE TRY THE FOLLOWING INSTEAD:
Press [Windows Key] + R
Type cmd
Press Ok
Type the following command:
net start w32time
This will start the time sync service if it is currently not active.
Press Enter
Type the following command:
w32tm /resync
This will resync your clock. If it fails you may manually have to set your time and date.
Press Enter


USING UPDATED SECURITY PROTOCOLS

USING UPDATED SECURITY PROTOCOLS
You may also be unable to connect through the game client if your system is configured to access the internet using SSL 2.0 or SSL 3.0 primarily. You can alleviate this by setting the Internet Options to disable SSL 2.0 and SSL 3.0 and enable TLS 1.0, 1.1, and 1.2. The Internet Options settings can be accessed through Internet Explorer:

Open Internet Explorer.
Select "Internet Options."
Navigate to the "Advanced Tab."
Scroll down in the window to the security section.
Uncheck the boxes to disable SSL 2.0 and SSL 3.0.
Check the boxes to enable TLS 1.0.
Hit Apply.
Restart League of Legends.
Alternatively, you can access it by clicking the Windows key and searching for "Internet Options." From there, you can continue from Step 3 and onward.

CONFIGURE YOUR DNS

CHANGING TO A PUBLIC DOMAIN NAME SYSTEM
The League of Legends launcher uses server aliases that have problems connecting to some Internet Service Providers' default Domain Name System resolver. If your launcher never seems to start downloading a patch, you may want to change to public DNS servers in your network settings. Most often, this only applies to players outside of the US.

NOTE: Changing these settings can cause problems with your internet connection if you have specified network configurations for another purpose. Be prepared to revert to your old settings and save any information you are about to change.


WINDOWS 8
Hit the Windows Key
Type "Control Panel"
Select "Network and Internet"
Select "Network and Sharing Center"
Select "Change Adapter Settings" on the navigation bar on the left
Right click on your network adapter and select "Properties"
Go to the bottom of the menu and change "Obtain DNS server address automatically" to "Use the following DNS server addresses:"
Put in the following public DNS servers, one in each empty field
8.8.8.8
8.8.4.4
Save your changes by selecting "Ok"
Close all open web browsers and applications
Hit the Windows Key
Right click anywhere
Click on "All Apps"
Right click "Command Prompt" and run as administrator
Type ipconfig /flushdns and press Enter
Restart your computer

WINDOWS 7 AND VISTA
Open the Start Menu
Open Control Panel
Select "Network and Internet"
Select "Network and Sharing Center"
Select "Change Adapter Settings" on the navigation bar on the left
Right click on your network adapter and select "Properties"
Select "Internet Protocol Version 4 (TCP/IPv4)" and open Properties
Go to the bottom of the menu and change "Obtain DNS server address automatically" to "Use the following DNS server addresses:"
Put in the following public DNS servers, one in each empty field
8.8.8.8
8.8.4.4
Save your changes by selecting "Ok"
Close all open web browsers and applications
Press the Windows Key
In the Search bar, type command prompt
Right click on the result and select Run as Administrator
In the command prompt, type ipconfig /flushdns and press Enter
Restart your computer

WINDOWS XP
Open the Start Menu
Open Control Panel
Open Network Connections
Right click on your network adapter and select “Properties”
Select “Internet Protocol (TCP/IP)” and open “Properties”
Go to the bottom of the menu and change ‘Obtain DNS server address automatically,’ to ‘Use the following DNS server addresses:’
Put in the following public DNS servers, one in each empty field:
8.8.8.8
8.8.4.4
Save your changes by selecting “Ok”
Close all open web browsers and applications
Press the Windows Key
In the Search bar type command prompt
Right click on the result and select Run as Administrator
In the command prompt type ipconfig /flushdns and press Enter.
Restart your computer