ReSharper's network activity
ReSharper may use your network connection for several purposes.
Description and configuration
Look for updates
ReSharper can detect available updates (including plugin updates) and suggest downloading new versions.
To disable automatic checks for updates, clear the Download the list of available updates checkbox on the page of ReSharper options (Alt+R, O).
Send out anonymous usage statistics
ReSharper can collect and send out some information that helps us find bottlenecks and improve the quality of the product. All information is sent anonymously.
To enable or disable this activity, use the Participate anonymously in the Feedback program checkbox on the page of ReSharper options (Alt+R, O).
Download PDB and symbol files
In order to work with original sources when navigating compiled code ReSharper may need to download PDB and symbol files from symbol server. You can disable that, in which case ReSharper will have to decompile locally available assemblies.
To toggle the access to symbol servers, use the Allow downloading from remote locations checkbox on the page of ReSharper options (Alt+R, O).
Search and install ReSharper extensions
By default, ReSharper enables the external package source (https://plugins.jetbrains.com/resharper/) for browsing and installing extensions. If necessary, you can disable this source and/or add your own local sources on the page of ReSharper options (Alt+R, O).
Download NuGet packages
ReSharper needs the internet connection to search metadata of NuGet packages when you are using NuGet Browser window.
Verify license information
ReSharper may use your network to check for duplicate licenses or to obtain a license from the license server. For more information, see Specify license information.
Normally, no additional modifications in the firewall configuration are needed. In case of any difficulties, adjust firewall settings so that devenv.exe can access the network. You can also adjust the proxy settings for ReSharper's internet connection on the page of ReSharper options (Alt+R, O).