Yes, PubNub clients' socket connections through port 80 or port 443 of a customer's firewall are safe. PubNub provides attack mitigation solutions starting with opening only outbound connections which means no ports need to be opened. Security vulnerability using the above configuration is prevented as follows:

  • Internet Communication over Port 80 and 443
  • PubNub-enabled device must be able to transmit outward to the Internet on port 80 or 443
  • PubNub clients do not open inbound ports
  • There is NO need to open the firewall to receive on port 80 or 443
  • There is NO way for outside users to get into the user's network
  • PubNub does not listen to any ports
  • That is the case even if the user opened ports 80/443 for receipt