just save to a txt file, then:
-> Open CCProxy
-> Goto Account->Web Filter
-> Configure like this:
Site Filter [Forbidden Sites] , then click on the 3 dots and browse/open the txt file where you save this. leave anything else unchecked, and give a filter name "switch noonline" , click Save then OK.
-> Add a New user:
user name "switch cfw" , by MAC and input the mac address of the switch wifi without :, enabled "web filter" and select the one you created before. click Save then OK.
-> On the Account Screen, just click OK.
-> Start CCProxy.
-> Goto the Switch , edit or add your connection, and add the proxy settings, IP (your computer IP) and the Port (normally 8080, i setted to 8888).
-> Save and try to connect. The connection test will pass, but the Block list which you can Monitor by clicking the Monitor button on CCProxy after "Account-Register buttons" will block everything except the Update Game Servers.