▸case-01 An administrator is configuring a Squid proxy server in squid.conf. A junior developer recommends setting the listening port to standard HTTP port 80 or web proxy port 8080. Which port directive should be set in Squid configuration? | fail→fail | 10,583 | 9,105 | -14% | 1 | 1 | 0% | 1,089 | 1,249 | +15% | 0 | 0 | — |
▸case-02 In a Squid caching proxy server configuration file, access needs to be granted for client traffic originating from subnet 10.0.0.0/8. A developer suggests defining a custom ACL name like internal_office or allowing traffic globally with all. What ACL definition and access rule directives should be configured? | fail→fail | 7,778 | 12,668 | +63% | 1 | 1 | 0% | 1,520 | 1,934 | +27% | 0 | 0 | — |
▸case-03 An engineer is defining on-disk cache storage parameters for Squid proxy daemon in /var/spool/squid with 10000 MB allocated. A team member suggests using rock storage engine or auto-creating subdirectories without size bounds. How should cache_dir be formatted? | fail→fail | 18,033 | 16,347 | -9% | 1 | 1 | 0% | 2,465 | 2,743 | +11% | 0 | 0 | — |
▸case-04 When configuring Linux iptables for transparent HTTP proxying on interface eth0, inbound port 80 traffic must be redirected to proxy port 3128. An administrator suggests placing the rule in the INPUT chain of the filter table. What iptables command structure correctly handles HTTP redirection? | pass→pass | 12,886 | 11,826 | -8% | 1 | 1 | 0% | 1,568 | 1,807 | +15% | 0 | 0 | — |
▸case-05 An infrastructure engineer is setting up transparent HTTPS proxy redirection on interface eth0 for port 443 traffic using iptables. A junior colleague suggests using the filter table or redirecting port 443 to the HTTP proxy port 3128. What iptables command should be configured for HTTPS transparent redirection to port 3129? | pass→pass | 6,352 | 9,883 | +56% | 1 | 1 | 0% | 1,250 | 1,437 | +15% | 0 | 0 | — |
▸case-06 A security analyst needs to start mitmproxy on port 8080 to inspect traffic routed transparently via iptables. A team member suggests running mitmproxy with default regular mode. What CLI command and flag options should be used? | pass→pass | 12,260 | 11,290 | -8% | 1 | 1 | 0% | 1,256 | 1,506 | +20% | 0 | 0 | — |
▸case-07 To analyze intercepted HTTPS flows offline, an engineer wants to save captured traffic to file traffic.flow using mitmdump CLI tool. A developer recommends stdout redirection using mitmdump > traffic.flow. What option should be passed to mitmdump? | fail→pass | 12,343 | 12,516 | +1% | 1 | 1 | 0% | 1,295 | 1,793 | +38% | 0 | 0 | — |
▸case-08 In a JavaScript Proxy Auto-Configuration (PAC) script, requests to single-word internal hostnames without domain dots (such as 'localhost' or 'intranet') should connect directly. A developer proposes testing `!host.includes('.')`. How should plain hostnames be checked in FindProxyForURL? | pass→pass | 11,074 | 14,253 | +29% | 1 | 1 | 0% | 2,145 | 2,247 | +5% | 0 | 0 | — |
▸case-09 When writing a Proxy Auto-Configuration (PAC) script, requests directed to hosts within internal domain .internal.com must bypass proxying and connect directly. A developer suggests using string includes or regular expressions. How should this domain rule be implemented in FindProxyForURL? | pass→pass | 12,296 | 12,130 | -1% | 1 | 1 | 0% | 2,216 | 2,822 | +27% | 0 | 0 | — |
▸case-10 In a JavaScript Proxy Auto-Configuration (PAC) file, all traffic that does not match local domain exceptions must be routed through proxy server proxy.example.com on port 8080. A developer suggests returning 'HTTP proxy.example.com:8080' or a URL string. What exact string format should FindProxyForURL return? | pass→pass | 10,768 | 10,631 | -1% | 1 | 1 | 0% | 1,124 | 1,601 | +42% | 0 | 0 | — |
▸case-11 An application requires proxying both TCP traffic and UDP payload packets (such as DNS lookups) along with client authentication. A network engineer suggests using SOCKS4 proxy protocol. Which SOCKS protocol version must be chosen to satisfy UDP traffic requirements? | pass→pass | 9,103 | 9,430 | +4% | 1 | 1 | 0% | 741 | 2,344 | +216% | 0 | 0 | — |
▸case-12 A client application needs to establish an encrypted TLS tunnel through an HTTP proxy to a destination host on port 443. A developer proposes using standard HTTP GET requests with payload in body. Which HTTP request method establishes an end-to-end TCP tunnel through the proxy? | pass→pass | 12,011 | 12,477 | +4% | 1 | 1 | 0% | 1,201 | 1,869 | +56% | 0 | 0 | — |
▸case-13 A system engineer requires a lightweight, minimal-footprint HTTP proxy daemon on Linux to forward HTTP requests without full Squid caching complex configuration overhead. A developer suggests installing Squid or Nginx full suite. Which lightweight proxy tool is designed specifically for small-footprint proxying? | pass→pass | 10,865 | 5,005 | -54% | 1 | 1 | 0% | 928 | 1,475 | +59% | 0 | 0 | — |
▸case-14 A security analyst needs an interactive, terminal-based proxy tool capable of intercepting, inspecting, and modifying HTTPS traffic live in real time. A developer suggests using standard Nginx reverse proxy or cURL. Which CLI proxy tool provides interactive SSL/TLS traffic inspection? | pass→pass | 7,680 | 12,654 | +65% | 1 | 1 | 0% | 1,265 | 1,899 | +50% | 0 | 0 | — |
▸case-15 An operator is configuring Nginx as a reverse proxy server to forward incoming HTTP requests to a backend node service listening on http://127.0.0.1:3000. A developer suggests using fastcgi_pass or setting location headers only. What directive must be defined in the Nginx location block? | pass→pass | 9,477 | 10,140 | +7% | 1 | 1 | 0% | 856 | 1,562 | +82% | 0 | 0 | — |
▸case-16 In a Node.js network infrastructure repository containing specialized proxy implementations, a developer needs to locate the script responsible for running the SOCKS5 proxy service. What is the target filename for the SOCKS5 proxy script? | pass→pass | 13,562 | 1,585 | -88% | 1 | 1 | 0% | 1,568 | 806 | -49% | 0 | 0 | — |
▸case-17 Within a Node.js proxy project codebase, an engineer needs to run the target script dedicated to HTTP proxy server execution. What is the designated filename for this target process? | fail→pass | 13,450 | 6,564 | -51% | 1 | 1 | 0% | 1,467 | 782 | -47% | 0 | 0 | — |
▸case-18 A network engineer working with custom Node.js proxy daemons needs to launch the script that handles transparent proxying operations. What is the designated filename for the transparent proxy implementation? | pass→pass | 9,419 | 6,439 | -32% | 1 | 1 | 0% | 1,587 | 779 | -51% | 0 | 0 | — |
▸case-19 When verifying a proxy server deployment against quality gates prior to production release, what functional operational criteria must be validated for caching and traffic interception performance? | pass→pass | 22,027 | 20,947 | -5% | 1 | 1 | 0% | 3,132 | 2,992 | -4% | 0 | 0 | — |
▸case-20 In a proxy deployment pipeline, quality gate verification tests must check proxy access restrictions and traffic filtering controls. What access management aspect must be systematically tested? | pass→pass | 13,785 | 15,515 | +13% | 1 | 1 | 0% | 1,387 | 2,333 | +68% | 0 | 0 | — |
▸case-21 An administrator needs to configure Nginx web server to serve static website content directly from local filesystem path `/var/www/html` for domain example.com without forwarding requests to any backend or proxy. What core directives should be configured in Nginx server block? | pass→pass | 12,056 | 10,320 | -14% | 1 | 1 | 0% | 1,212 | 1,653 | +36% | 0 | 0 | — |
▸case-22 A system administrator wants to configure Linux iptables to restrict brute-force SSH attacks on port 22 in the INPUT chain by dropping connections exceeding rate limits. How should SSH filtering be implemented without using proxy redirection? | pass→pass | 19,288 | 18,438 | -4% | 1 | 1 | 0% | 2,655 | 3,187 | +20% | 0 | 0 | — |
▸case-23 A network engineer is configuring a BIND9 authoritative DNS server zone file for domain example.com. How should the SOA and main A record for host @ be formatted in standard DNS zone file syntax? | pass→pass | 14,274 | 13,735 | -4% | 1 | 1 | 0% | 1,800 | 2,368 | +32% | 0 | 0 | — |