Port 80 supports HTTP and http (UDP reference coverage) and http (SCTP reference coverage) across distinct transports. Review each protocol before writing firewall or monitoring policy.
Unencrypted HTTP application traffic.
Websites, APIs, health checks, redirects to HTTPS and internal service communication.
Client to server
Do not send sensitive data without TLS. Prefer redirecting public traffic to HTTPS and constrain administrative endpoints.
http (UDP reference coverage) is documented as a network service convention for port 80 over UDP.
Use this reference entry when identifying or validating systems documented to use 80/UDP.
Varies
Confirm the listening process and current vendor documentation before permitting traffic; a listed convention does not prove the active service or its security posture.
http (SCTP reference coverage) is documented as a network service convention for port 80 over SCTP.
Use this reference entry when identifying or validating systems documented to use 80/SCTP.
Varies
Confirm the listening process and current vendor documentation before permitting traffic; a listed convention does not prove the active service or its security posture.