How server-info/.htaccess works
This repository is not an application or library; it is a single-purpose security guidance document centered on Apache HTTP Server exposure risks.
The entire repo consists of one top-level artifact, README.md. There are no source files, build scripts, tests, containers, or runtime components. For an architecture diagram, this should be represented as a documentation-only repo with no executable system boundary.
The content is organized around one security pattern: the public exposure of Apache’s mod_info and the associated leak of configuration details, especially .htaccess-derived directives. The README explicitly notes that .htaccess itself is not the problem; the risk comes from pairing it with an externally reachable server-info endpoint.
The main “subsystems” described are:
• Apache mod_info, which exposes parsed server configuration at /server-info
• Apache mod_status, referenced as a similar endpoint at /server-status
• .htaccess files, which can reveal internal paths, auth backends, and rewrite rules
• public internet exposure, which is the attacker-facing boundary
The data flow described is simple: Apache parses configuration and, if mod_info is enabled and reachable, renders that configuration to an HTTP response. That response can include virtual hosts, loaded modules, directive values, and filesystem paths, which becomes reconnaissance data for external bots or attackers.
The trust boundary is the server edge. The repo’s core message is that administrative/debug endpoints must not cross from internal-only access into public access. The recommended controls all reinforce that boundary by restricting access to loopback/internal networks and denying direct access to dotfiles.
Mitigations called out in the README are operational configuration controls, not code changes:
• restrict /server-info with IP-based access control
• similarly restrict /server-status
• deny serving .ht* files directly
• reduce fingerprinting via ServerTokens Prod and ServerSignature Off
The verification step is also part of the architecture. The README recommends testing from an external machine with curl -I against /server-info and /server-status to confirm that the public interface returns 403 or 404. That makes external reachability the key acceptance criterion.
Overall, the repo’s architecture is best described as a security education artifact with three logical layers: exposed Apache diagnostics, configuration-sensitive metadata, and defensive access controls. It teaches how a small misconfiguration can turn internal server metadata into an externally observable attack surface.
Main entry points: README.md README
Components 13
Documentation
Single-file guidance repository.
- README · Single security guidance document for Apache exposure risks.
README.md
Exposure
Public-facing Apache diagnostics and leaked metadata.
- Public Internet · External attackers and bots that can probe exposed endpoints.
- mod_info · Exposes parsed configuration via /server-info when reachable.
- /server-info · Administrative endpoint that can leak Apache configuration details.
- mod_status · Status module referenced as a similar internal-only endpoint.
- /server-status · Administrative status endpoint that should not be publicly reachable.
- .htaccess · Access and rewrite directives that may reveal internal paths and auth details.
- Apache Config · Loaded modules, vhosts, directives, and filesystem paths parsed by Apache.
- Leakage · Configuration and path data exposed to unauthenticated clients.
Mitigations
Operational controls that keep diagnostics internal.
- IP ACLs · Restrict diagnostic endpoints to loopback or internal networks.
- Deny dotfiles · Block direct serving of .ht* files from the web server.
- Fingerprinting · Reduce banner and signature detail with ServerTokens Prod and ServerSignature Off.
- External check · Confirm public access is denied using curl from an outside machine.
Connections 18
- README → mod_info: describes · The guide centers on mod_info exposure.
- README → mod_status: references · The guide also discusses mod_status as a similar endpoint.
- README → .htaccess: warns about · Explains how .htaccess can leak sensitive internal details.
- mod_info → /server-info: serves · Enabled mod_info can render configuration at /server-info.
- mod_status → /server-status: serves · Enabled status module can expose /server-status.
- /server-info → Apache Config: reveals · The endpoint can expose loaded modules, directives, and vhosts.
- .htaccess → Apache Config: contains · Dotfile directives may expose auth backends, rewrites, and paths.
- Public Internet → /server-info: probes · External clients can reach the endpoint if it is exposed.
- Public Internet → /server-status: probes · External clients can reach the status endpoint if it is exposed.
- Apache Config → Leakage: creates · Parsed configuration becomes reconnaissance data when exposed.
- /server-info → Leakage: exposes · Public server-info responses leak internal metadata.
- /server-status → Leakage: exposes · Public server-status responses can reveal operational details.
- IP ACLs → /server-info: restricts · Limit access to trusted internal addresses.
- IP ACLs → /server-status: restricts · Limit access to trusted internal addresses.
- Deny dotfiles → .htaccess: blocks · Prevent direct retrieval of dotfiles over HTTP.
- Fingerprinting → Leakage: reduces · Lower banner and signature detail to shrink exposed metadata.
- External check → /server-info: checks · Validate that external requests return 403 or 404.
- External check → /server-status: checks · Validate that external requests return 403 or 404.