Proxy server

Skill a5c-ai/babysitter/library/specializations/network-programming/skills/proxy-server

Expert skill for proxy server implementation, configuration, and traffic interceptionFrom its SKILL.md

Install

npx -y skills add a5c-ai/babysitter --skill proxy-server

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

SKILL.md

2.3 KB, 507 tokens by cl100k_base, as published. Nobody here has run it

Proxy Server Skill

Expert skill for proxy server implementation, configuration, and network traffic interception.

Capabilities

Proxy Configuration: Configure Squid, mitmproxy, Charles, and nginx proxy
HTTP CONNECT Tunneling: Implement HTTP CONNECT for HTTPS tunneling
SOCKS Protocol: Configure SOCKS4/SOCKS5 proxy servers
Transparent Proxying: Implement transparent proxying with iptables/nftables
Traffic Analysis: Analyze proxy traffic and generate reports
Debugging: Debug proxy connection issues and SSL/TLS interception
PAC File Generation: Generate Proxy Auto-Configuration (PAC) files
Caching: Configure proxy caching strategies

Tools and Dependencies

Squid - Caching proxy server
mitmproxy - Interactive HTTPS proxy
nginx - HTTP and reverse proxy
iptables/nftables - Linux firewall for transparent proxy
Charles - HTTP proxy/monitor
tinyproxy - Lightweight proxy

Target Processes

http-proxy-server.js
socks5-proxy.js
transparent-proxy.js

Usage Examples

Squid HTTP Proxy Configuration

http_port 3128
acl localnet src 10.0.0.0/8
http_access allow localnet
cache_dir ufs /var/spool/squid 10000 16 256

Transparent Proxy with iptables

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 3129

mitmproxy Interception

mitmproxy -p 8080 --mode transparent
mitmdump -w traffic.flow

PAC File Example

function FindProxyForURL(url, host) {
    if (isPlainHostName(host)) return "DIRECT";
    if (dnsDomainIs(host, ".internal.com")) return "DIRECT";
    return "PROXY proxy.example.com:8080";
}

Quality Gates

Proxy functionality verified
SSL/TLS interception working
Transparent mode operational
Caching efficiency validated
Access control tested

What ships with it: 1 file

762 B alongside SKILL.md

README.md762 B