Port 443HTTPS
HTTPS (Hypertext Transfer Protocol Secure) is the encrypted version of HTTP, which enables secure communication over computer networks. It uses SSL/TLS protocols to encrypt and decrypt requests and responses between web clients and servers, ensuring data integrity and confidentiality. HTTPS is the standard protocol for accessing secure websites, handling sensitive transactions, and protecting user privacy online..
- transport
- tcp
- in transit
- encrypted
- assignment
- official
- risk
- 4/10
- lookups
- 65,872
single transport
payload protected on the wire
registered with iana
caution
rank 13 of 993 · top 1%
Technical Details
what runs on :443HTTPS is an extension of HTTP designed to facilitate secure communication over a computer network. It achieves this by leveraging SSL (Secure Sockets Layer) or its successor TLS (Transport Layer Security) to encrypt data in transit, thereby preventing unauthorized access or tampering.
When a client initiates an HTTPS connection, it begins with a TLS handshake, establishing a secure encrypted channel before any HTTP data is transmitted. During this handshake, the server typically presents a digital certificate issued by a trusted Certificate Authority (CA), which authenticates the server’s identity. Once the encrypted session is established, HTTP requests and responses occur within this secure tunnel.
Commonly, HTTPS is used for any web service requiring privacy and security, such as banking, e-commerce, online login interfaces, and anywhere sensitive or private data is exchanged. SSL/TLS encrypts not only the data payload but also protects session cookies and user credentials, making HTTPS the fundamental technology underpinning secure web browsing.
Security Information
exposure of :443risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
web services averages 3.9 across 112 ports — this one sits 0.1 above.
in transit
encrypted
payloads are protected on the wire
assignment
official
registered with iana for this service — scanners fingerprint it by number
reachable over
tcp
every listening transport is another surface to filter at the edge
security overview
Common Vulnerabilities:
- Misconfigured SSL/TLS implementations (obsolete protocols like SSLv2/v3, weak ciphers)
- Usage of invalid, expired, or self-signed certificates
- Susceptibility to Man-in-the-Middle (MitM) attacks if certificate validation fails
- Vulnerabilities such as Heartbleed, BEAST, POODLE targeting specific SSL/TLS flaws
- HTTPS downgrade attacks (e.g., SSL stripping)
Common Mitigations:
- Enforce use of modern, secure versions of TLS (TLS 1.2 or TLS 1.3)
- Use strong cipher suites and disable weak algorithms (like RC4, MD5)
- Deploy certificates from reputable Certificate Authorities and enable certificate revocation checks
- Implement HTTP Strict Transport Security (HSTS) headers to resist downgrade attacks
- Regularly audit SSL/TLS configuration using tools like Qualys SSL Labs
- Maintain prompt patching against SSL/TLS-related vulnerabilities/protocol weaknesses
Related Ports
the 8 most looked-up other ports in web services — 112 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :8888 | Sun Answerbook & Alt HTTP | TCP | Web Services | caution | 123.9k |
| :8000 | Intel Remote Desktop / Alternate HTTP Port | TCP | Web Services | safe | 84.3k |
| :8888 | NewsEDGE | TCPUDP | Web Services | caution | 83.3k |
| :8888 | HTTP Alternative Port | TCP | Web Services | caution | 76.5k |
| :8888 | GNUmp3d Streaming HTTP | TCP | Web Services | caution | 76.3k |
| :9080 | Groove RPC | TCPUDP | Web Services | caution | 70.8k |
| :8881 | Atlasz Secure Server | TCP | Web Services | caution | 67.6k |
| :80 | HTTP | TCPUDP | Web Services | caution | 67.3k |
risk mix of the 8 listed
- safe13%
- caution88%
0 of 8 encrypted