An organization hosts an internal ticketing application that users access via https://support.company.local./ After a firewall replacement, users can reach the login page only from inside the server's subnet. Which destination TCP port should the network team allow to restore secure access from other VLANs?
HTTPS traffic is encrypted using TLS and, by convention, listens on TCP port 443. If that port is blocked at the firewall, external clients cannot complete the TLS handshake or load the secure web page. Opening TCP 443 permits the required encrypted web traffic. Ports 80 (HTTP), 22 (SSH), and 110 (POP3) serve different protocols and would not resolve the problem.
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Why is TCP port 443 used for HTTPS?
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