I guess your reason is that you didn't open port 443 of this machine. Web browsing port 443 is mainly used for HTTPS service, which is another HTTP that provides encryption and transmission through a secure port. In some websites with high security requirements, such as banks, securities, shopping, etc. , using HTTPS service, so that the information exchanged on these websites can not be seen by others, ensuring the security of transactions. The address of a web page starts with https:// instead of the usual http://. How to open port 443: Open windows Firewall in Control Panel, click Add Port in the Exceptions tab and enter the port number. If it doesn't work, your network administrator must have restricted port 443 at the place of network router or firewall, and there is no way, unless the network administrator opens the port. Of course, if your company's other online banking can access it, it means that the default access port of HSBC is not 443, but another one, but your company's network management has not opened the corresponding port on the router or firewall.