What is the ruling on money earned from working at an internet company that does not block pornographic websites, and is it permissible to perform Hajj with money that has been commingled with such earnings?

Internet service is permissible if used in a beneficial manner, and the principle concerning it is permissibility unless it is highly probable that it will be used for something forbidden. Therefore, there is no harm in money earned from working for a company that provides this service, unless it is known that the company uses the internet in a forbidden manner.