Internet-Security.com TCP port 80 details

TCP port 80 is primarily used for HTTP/1.0 and HTTP/1.1 cleartext web traffic.
Common web servers that listen on 80 include Apache HTTP Server (httpd), Nginx, Microsoft IIS, Lighttpd, and Caddy (often to redirect to HTTPS on 443).
Reverse proxies and load balancers such as HAProxy, Traefik, NGINX Ingress Controller (Kubernetes), and AWS Application Load Balancer expose HTTP services on port 80.
Caching/CDN front ends like Varnish Cache, Cloudflare, and Akamai accept client connections on 80 (frequently redirecting to 443 or fetching origins over 80).
Clients initiating TCP/80 connections include web browsers (Chrome, Firefox, Edge, Safari) and CLI tools like curl and wget.
OS/package systems often fetch over HTTP on 80, e.g., Debian/Ubuntu apt and RHEL/CentOS dnf/yum when using HTTP mirrors.
Many embedded/IoT admin UIs use port 80, including home routers (Netgear, TP-Link), printers (HP Embedded Web Server/JetDirect), and IP cameras/NAS using GoAhead, uHTTPd, or BusyBox httpd.
Web apps/platforms like WordPress, Drupal, and Joomla are commonly served via port 80 behind Apache/Nginx/IIS.
Security: port 80 is a frequent target for web exploits (SQL injection, XSS, RCE in CGI/WebDAV/embedded servers like GoAhead/IIS/Apache modules) and mass scanning/brute-forcing of default admin pages.

TCP 80